Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in s√=8s=8 TeV pp collisions with the ATLAS detector

Journal of High Energy Physics Springer 2013:10 (2013) 189

Authors:

Alan Barr, Amanda Cooper-Sarkar, Elizabeth Gallas, Claire Gwenlan, Christopher P Hays, B Todd Huffman, Cigdem Issever, Richard B Nickerson, Nicholas C Ryder, Jeffrey C-L Tseng, Georg HA Viehhauser, Anthony R Weidberg, Jiahang Zhong

Abstract:

The results of a search for pair production of supersymmetric partners of the Standard Model third-generation quarks are reported. This search uses 20.1 fb^−1 of pp collisions at s√=8s=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The lightest bottom and top squarks ( b˜1 and t˜1 respectively) are searched for in a final state with large missing transverse momentum and two jets identified as originating from b-quarks. No excess of events above the expected level of Standard Model background is found. The results are used to set upper limits on the visible cross section for processes beyond the Standard Model. Exclusion limits at the 95 % confidence level on the masses of the third-generation squarks are derived in phenomenological supersymmetric R-parity-conserving models in which either the bottom or the top squark is the lightest squark. The b˜1 is assumed to decay via b˜1 → bχ~01 and the t˜1 via t˜1 → bχ~±1, with undetectable products of the subsequent decay of the χ∼±1 due to the small mass splitting between the χ∼±1 and the χ∼01 .

Dynamics of isolated-photon plus jet production in pp collisions at s=7 TeV with the ATLAS detector

Nuclear Physics B 875:3 (2013) 483-535

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, S Abdel Khalek, AA Abdelalim, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, T Adye, S Aefsky, T Agatonovic-Jovin, JA Aguilar-Saavedra, M Agustoni, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, TPA A kesson, G Akimoto, AV Akimov, MA Alam, J Albert, S Albrand, MJ Alconada Verzini, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, BMM Allbrooke, LJ Allison, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer, B Alvarez Gonzalez, MG Alviggi, K Amako, Y Amaral Coutinho, C Amelung, VV Ammosov, SP Amor Dos Santos, A Amorim, S Amoroso, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, S Angelidakis, P Anger, A Angerami, F Anghinolfi, AV Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli

Abstract:

The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb-1. Measurements of isolated-photon plus jet bin-averaged cross sections are presented as functions of photon transverse energy, jet transverse momentum and jet rapidity. In addition, the bin-averaged cross sections as functions of the difference between the azimuthal angles of the photon and the jet, the photon-jet invariant mass and the scattering angle in the photon-jet centre-of-mass frame have been measured. Next-to-leading-order QCD calculations are compared to the measurements and provide a good description of the data, except for the case of the azimuthal opening angle. © 2013 CERN.

Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at root s = 8 TeV proton-proton collisions using the ATLAS experiment

Journal of High Energy Physics Springer Berlin Heidelberg 10:1 (2013)

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, T Adye, S Aefsky, T Agatonovic-Jovin, JA Aguilar-Saavedra, M Agustoni, SP Ahlen

Abstract:

A search is presented for new particles decaying to large numbers (7 or more) of jets, with missing transverse momentum and no isolated electrons or muons. This analysis uses 20.3 fb−1 of pp collision data at s√=8s=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The sensitivity of the search is enhanced by considering the number of b-tagged jets and the scalar sum of masses of large-radius jets in an event. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of various simplified supersymmetry-inspired models where gluinos are pair produced, as well as an mSUGRA/CMSSM model.

Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb+Pb Collisions at sNN=2.76 TeV with the ATLAS Detector

Physical Review Letters American Physical Society (APS) 111:15 (2013) 152301

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, S Abdel Khalek, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, T Adye, S Aefsky, T Agatonovic-Jovin, JA Aguilar-Saavedra, M Agustoni, SP Ahlen, A Ahmad, M Ahsan, G Aielli, TPA Åkesson, G Akimoto, AV Akimov, MA Alam, J Albert, S Albrand, MJ Alconada Verzini, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, L Alio, J Alison, BMM Allbrooke, LJ Allison, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer, B Alvarez Gonzalez, MG Alviggi, K Amako, Y Amaral Coutinho, C Amelung, VV Ammosov, SP Amor Dos Santos, A Amorim, S Amoroso, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, S Angelidakis, P Anger, A Angerami, F Anghinolfi, AV Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, J-F Arguin, S Argyropoulos, E Arik, M Arik, AJ Armbruster, O Arnaez, V Arnal, A Artamonov, G Artoni, D Arutinov, S Asai, N Asbah, S Ask, B Åsman, L Asquith, K Assamagan, R Astalos, A Astbury, M Atkinson, NB Atlay, B Auerbach, E Auge, K Augsten, M Aurousseau, G Avolio, D Axen, G Azuelos, Y Azuma, MA Baak, C Bacci, AM Bach, H Bachacou, K Bachas, M Backes, M Backhaus, J Backus Mayes, E Badescu, P Bagiacchi, P Bagnaia, Y Bai, DC Bailey, T Bain, JT Baines, OK Baker, S Baker, P Balek, F Balli, E Banas, Sw Banerjee, D Banfi, A Bangert, V Bansal, HS Bansil, L Barak, SP Baranov, T Barber, EL Barberio, D Barberis, M Barbero, DY Bardin, T Barillari, M Barisonzi, T Barklow, N Barlow, BM Barnett, RM Barnett, A Baroncelli, G Barone, AJ Barr, F Barreiro, J Barreiro Guimarães da Costa, R Bartoldus, AE Barton, V Bartsch, A Basye, RL Bates, L Batkova, JR Batley, M Battistin, F Bauer, HS Bawa, S Beale, T Beau, PH Beauchemin, R Beccherle, P Bechtle, HP Beck, K Becker, S Becker, M Beckingham, KH Becks, AJ Beddall, A Beddall, S Bedikian, VA Bednyakov, CP Bee, LJ Beemster, TA Beermann, M Begel, C Belanger-Champagne, PJ Bell, WH Bell, G Bella, L Bellagamba, A Bellerive, M Bellomo, A Belloni, OL Beloborodova, K Belotskiy, O Beltramello, O Benary, D Benchekroun, K Bendtz, N Benekos, Y Benhammou, E Benhar Noccioli, JA Benitez Garcia, DP Benjamin, JR Bensinger, K Benslama, S Bentvelsen, D Berge, E Bergeaas Kuutmann, N Berger, F Berghaus, E Berglund, J Beringer, C Bernard, P Bernat, R Bernhard, C Bernius, FU Bernlochner, T Berry, C Bertella, F Bertolucci, MI Besana, GJ Besjes, O Bessidskaia, N Besson, S Bethke, W Bhimji, RM Bianchi, L Bianchini, M Bianco, O Biebel, SP Bieniek, K Bierwagen, J Biesiada, M Biglietti, J Bilbao De Mendizabal, H Bilokon, M Bindi, S Binet, A Bingul, C Bini, B Bittner, CW Black, JE Black, KM Black, D Blackburn, RE Blair, J-B Blanchard, T Blazek, I Bloch, C Blocker, J Blocki, W Blum, U Blumenschein, GJ Bobbink, VS Bobrovnikov, SS Bocchetta, A Bocci, CR Boddy, M Boehler, J Boek, TT Boek, N Boelaert, JA Bogaerts, AG Bogdanchikov, A Bogouch, C Bohm, J Bohm, V Boisvert, T Bold, V Boldea, NM Bolnet, M Bomben, M Bona, M Boonekamp, S Bordoni, C Borer, A Borisov, G Borissov, M Borri, S Borroni, J Bortfeldt, V Bortolotto, K Bos, D Boscherini, M Bosman, H Boterenbrood, J Bouchami, J Boudreau, EV Bouhova-Thacker, D Boumediene, C Bourdarios, N Bousson, S Boutouil, A Boveia, J Boyd, IR Boyko, I Bozovic-Jelisavcic, J Bracinik, P Branchini, A Brandt, G Brandt, O Brandt, U Bratzler, B Brau, JE Brau, HM Braun, SF Brazzale, B Brelier, J Bremer, K Brendlinger, R Brenner, S Bressler, TM Bristow, D Britton, FM Brochu, I Brock, R Brock, F Broggi, C Bromberg, J Bronner, G Brooijmans, T Brooks, WK Brooks, E Brost, G Brown, J Brown, PA Bruckman de Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni, G Bruni, M Bruschi, L Bryngemark, T Buanes, Q Buat, F Bucci, J Buchanan, P Buchholz, RM Buckingham, AG Buckley, SI Buda, IA Budagov, B Budick, L Bugge, O Bulekov, AC Bundock, M Bunse, T Buran, H Burckhart, S Burdin, T Burgess, S Burke, E Busato, V Büscher, P Bussey, CP Buszello, B Butler, JM Butler, CM Buttar, JM Butterworth, W Buttinger, M Byszewski, S Cabrera Urbán, D Caforio, O Cakir, P Calafiura, G Calderini, P Calfayan, R Calkins, LP Caloba, R Caloi, D Calvet, S Calvet, R Camacho Toro, P Camarri, D Cameron, LM Caminada, R Caminal Armadans, S Campana, M Campanelli, V Canale, F Canelli, A Canepa, J Cantero, R Cantrill, T Cao, MDM Capeans Garrido, I Caprini, M Caprini, D Capriotti, M Capua, R Caputo, R Cardarelli, T Carli, G Carlino, L Carminati, S Caron, E Carquin, GD Carrillo-Montoya, AA Carter, JR Carter, J Carvalho, D Casadei, MP Casado, M Cascella, C Caso, E Castaneda-Miranda, A Castelli, V Castillo Gimenez, NF Castro, G Cataldi, P Catastini, A Catinaccio, JR Catmore, A Cattai, G Cattani, S Caughron, V Cavaliere, D Cavalli, M Cavalli-Sforza, V Cavasinni, F Ceradini, B Cerio, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, A Cervelli, SA Cetin, A Chafaq, D Chakraborty, I Chalupkova, K Chan, P Chang, B Chapleau, JD Chapman, JW Chapman, DG Charlton, V Chavda, CA Chavez Barajas, S Cheatham, S Chekanov, SV Chekulaev, GA Chelkov, MA Chelstowska, C Chen, H Chen, S Chen, X Chen, Y Chen, Y Cheng, A Cheplakov, R Cherkaoui El Moursli, V Chernyatin, E Cheu, L Chevalier, V Chiarella, G Chiefari, JT Childers, A Chilingarov, G Chiodini, AS Chisholm, RT Chislett, A Chitan, MV Chizhov, G Choudalakis, S Chouridou, BKB Chow, IA Christidi, A Christov, D Chromek-Burckhart, ML Chu, J Chudoba, G Ciapetti, AK Ciftci, R Ciftci, D Cinca, V Cindro, A Ciocio, M Cirilli, P Cirkovic, ZH Citron, M Citterio, M Ciubancan, A Clark, PJ Clark, RN Clarke, JC Clemens, B Clement, C Clement, Y Coadou, M Cobal, A Coccaro, J Cochran, S Coelli, L Coffey, JG Cogan, J Coggeshall, J Colas, B Cole, S Cole, AP Colijn, C Collins-Tooth, J Collot, T Colombo, G Colon, G Compostella, P Conde Muiño, E Coniavitis, MC Conidi, SM Consonni, V Consorti, S Constantinescu, C Conta, G Conti, F Conventi, M Cooke, BD Cooper, AM Cooper-Sarkar, NJ Cooper-Smith, K Copic, T Cornelissen, M Corradi, F Corriveau, A Corso-Radu, A Cortes-Gonzalez, G Cortiana, G Costa, MJ Costa, D Costanzo, D Côté, G Cottin, L Courneyea, G Cowan, BE Cox, K Cranmer, S Crépé-Renaudin, F Crescioli, M Cristinziani, G Crosetti, C-M Cuciuc, C Cuenca Almenar, T Cuhadar Donszelmann, J Cummings, M Curatolo, C Cuthbert, H Czirr, P Czodrowski, Z Czyczula, S D’Auria, M D’Onofrio, A D’Orazio, MJ Da Cunha Sargedas De Sousa, C Da Via, W Dabrowski, A Dafinca, T Dai, F Dallaire, C Dallapiccola, M Dam, DS Damiani, AC Daniells, HO Danielsson, V Dao, G Darbo, GL Darlea, S Darmora, JA Dassoulas, W Davey, C David, T Davidek, E Davies, M Davies, O Davignon, AR Davison, Y Davygora, E Dawe, I Dawson, RK Daya-Ishmukhametova, K De, R de Asmundis, S De Castro, S De Cecco, J de Graat, N De Groot, P de Jong, C De La Taille, H De la Torre, F De Lorenzi, L De Nooij, D De Pedis, A De Salvo, U De Sanctis, A De Santo, JB De Vivie De Regie, G De Zorzi, WJ Dearnaley, R Debbe, C Debenedetti, B Dechenaux, DV Dedovich, J Degenhardt, J Del Peso, T Del Prete, T Delemontex, M Deliyergiyev, A Dell’Acqua, L Dell’Asta, M Della Pietra, D della Volpe, M Delmastro, PA Delsart, C Deluca, S Demers, M Demichev, A Demilly, B Demirkoz, SP Denisov, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, PO Deviveiros, A Dewhurst, B DeWilde, S Dhaliwal, R Dhullipudi, A Di Ciaccio, L Di Ciaccio, C Di Donato, A Di Girolamo, B Di Girolamo, S Di Luise, A Di Mattia, B Di Micco, R Di Nardo, A Di Simone, R Di Sipio, MA Diaz, EB Diehl, J Dietrich, TA Dietzsch, S Diglio, K Dindar Yagci, J Dingfelder, F Dinut, C Dionisi, P Dita, S Dita, F Dittus, F Djama, T Djobava, MAB do Vale, A Do Valle Wemans, TKO Doan, D Dobos, E Dobson, J Dodd, C Doglioni, T Doherty, T Dohmae, Y Doi, J Dolejsi, Z Dolezal, BA Dolgoshein, M Donadelli, J Donini, J Dopke, A Doria, A Dos Anjos, A Dotti, MT Dova, AT Doyle, M Dris, J Dubbert, S Dube, E Dubreuil, E Duchovni, G Duckeck, D Duda, A Dudarev, F Dudziak, L Duflot, M-A Dufour, L Duguid, M Dührssen, M Dunford, H Duran Yildiz, M Düren, M Dwuznik, J Ebke, W Edson, CA Edwards, NC Edwards, W Ehrenfeld, T Eifert, G Eigen, K Einsweiler, E Eisenhandler, T Ekelof, M El Kacimi, M Ellert, S Elles, F Ellinghaus, K Ellis, N Ellis, J Elmsheuser, M Elsing, D Emeliyanov, Y Enari, OC Endner, R Engelmann, A Engl, J Erdmann, A Ereditato, D Eriksson, J Ernst, M Ernst, J Ernwein, D Errede, S Errede, E Ertel, M Escalier, H Esch, C Escobar, X Espinal Curull, B Esposito, F Etienne, AI Etienvre, E Etzion, D Evangelakou, H Evans, L Fabbri, C Fabre, G Facini, RM Fakhrutdinov, S Falciano, Y Fang, M Fanti, A Farbin, A Farilla, T Farooque, S Farrell, SM Farrington, P Farthouat, F Fassi, P Fassnacht, D Fassouliotis, B Fatholahzadeh, A Favareto, L Fayard, P Federic, OL Fedin, W Fedorko, M Fehling-Kaschek, L Feligioni, C Feng, EJ Feng, H Feng, AB Fenyuk, J Ferencei, W Fernando, S Ferrag, J Ferrando, V Ferrara, A Ferrari, P Ferrari, R Ferrari, DE Ferreira de Lima, A Ferrer, D Ferrere, C Ferretti, A Ferretto Parodi, M Fiascaris, F Fiedler, A Filipčič, M Filipuzzi, F Filthaut, M Fincke-Keeler, KD Finelli, MCN Fiolhais, L Fiorini, A Firan, J Fischer, MJ Fisher, EA Fitzgerald, M Flechl, I Fleck, P Fleischmann, S Fleischmann, GT Fletcher, G Fletcher, T Flick, A Floderus, LR Flores Castillo, AC Florez Bustos, MJ Flowerdew, T Fonseca Martin, A Formica, A Forti, D Fortin, D Fournier, H Fox, P Francavilla, M Franchini, S Franchino, D Francis, M Franklin, S Franz, M Fraternali, S Fratina, ST French, C Friedrich, F Friedrich, D Froidevaux, JA Frost, C Fukunaga, E Fullana Torregrosa, BG Fulsom, J Fuster, C Gabaldon, O Gabizon, A Gabrielli, A Gabrielli, S Gadatsch, T Gadfort, S Gadomski, G Gagliardi, P Gagnon, C Galea, B Galhardo, EJ Gallas, V Gallo, BJ Gallop, P Gallus, G Galster, KK Gan, RP Gandrajula, YS Gao, A Gaponenko, FM Garay Walls, F Garberson, C García, JE García Navarro, M Garcia-Sciveres, RW Gardner, N Garelli, V Garonne, C Gatti, G Gaudio, B Gaur, L Gauthier, P Gauzzi, IL Gavrilenko, C Gay, G Gaycken, EN Gazis, P Ge, Z Gecse, CNP Gee, DAA Geerts, Ch Geich-Gimbel, K Gellerstedt, C Gemme, A Gemmell, MH Genest, S Gentile, M George, S George, D Gerbaudo, A Gershon, H Ghazlane, N Ghodbane, B Giacobbe, S Giagu, V Giangiobbe, P Giannetti, F Gianotti, B Gibbard, SM Gibson, M Gilchriese, TPS Gillam, D Gillberg, AR Gillman, DM Gingrich, N Giokaris, MP Giordani, R Giordano, FM Giorgi, P Giovannini, PF Giraud, D Giugni, C Giuliani, M Giunta, BK Gjelsten, I Gkialas, LK Gladilin, C Glasman, J Glatzer, A Glazov, GL Glonti, M Goblirsch-Kolb, JR Goddard, J Godfrey, J Godlewski, M Goebel, C Goeringer, S Goldfarb, T Golling, D Golubkov, A Gomes, LS Gomez Fajardo, R Gonçalo, J Goncalves Pinto Firmino Da Costa, L Gonella, S González de la Hoz, G Gonzalez Parra, ML Gonzalez Silva, S Gonzalez-Sevilla, JJ Goodson, L Goossens, PA Gorbounov, HA Gordon, I Gorelov, G Gorfine, B Gorini, E Gorini, A Gorišek, E Gornicki, AT Goshaw, C Gössling, MI Gostkin, I Gough Eschrich, M Gouighri, D Goujdami, MP Goulette, AG Goussiou, C Goy, S Gozpinar, HMX Grabas, L Graber, I Grabowska-Bold, P Grafström, K-J Grahn, E Gramstad, F Grancagnolo, S Grancagnolo, V Grassi, V Gratchev, HM Gray, JA Gray, E Graziani, OG Grebenyuk, T Greenshaw, ZD Greenwood, K Gregersen, IM Gregor, P Grenier, J Griffiths, N Grigalashvili, AA Grillo, K Grimm, S Grinstein, Ph Gris, YV Grishkevich, J-F Grivaz, JP Grohs, A Grohsjean, E Gross, J Grosse-Knetter, J Groth-Jensen, K Grybel, F Guescini, D Guest, O Gueta, C Guicheney, E Guido, T Guillemin, S Guindon, U Gul, J Gunther, J Guo, S Gupta, P Gutierrez, NG Gutierrez Ortiz, N Guttman, O Gutzwiller, C Guyot, C Gwenlan, CB Gwilliam, A Haas, S Haas, C Haber, HK Hadavand, P Haefner, Z Hajduk, H Hakobyan, D Hall, G Halladjian, K Hamacher, P Hamal, K Hamano, M Hamer, A Hamilton, S Hamilton, L Han, K Hanagaki, K Hanawa, M Hance, C Handel, P Hanke, JR Hansen, JB Hansen, JD Hansen, PH Hansen, P Hansson, K Hara, AS Hard, T Harenberg, S Harkusha, D Harper, RD Harrington, OM Harris, J Hartert, F Hartjes, A Harvey, S Hasegawa, Y Hasegawa, S Hassani, S Haug, M Hauschild, R Hauser, M Havranek, CM Hawkes, RJ Hawkings, AD Hawkins, T Hayashi, D Hayden, CP Hays, HS Hayward, SJ Haywood, SJ Head, T Heck, V Hedberg, L Heelan, S Heim, B Heinemann, S Heisterkamp, J Hejbal, L Helary, C Heller, M Heller, S Hellman, D Hellmich, C Helsens, J Henderson, RCW Henderson, A Henrichs, AM Henriques Correia, S Henrot-Versille, C Hensel, GH Herbert, CM Hernandez, Y Hernández Jiménez, R Herrberg-Schubert, G Herten, R Hertenberger, L Hervas, GG Hesketh, NP Hessey, R Hickling, E Higón-Rodriguez, JC Hill, KH Hiller, S Hillert, SJ Hillier, I Hinchliffe, E Hines, M Hirose, D Hirschbuehl, J Hobbs, N Hod, MC Hodgkinson, P Hodgson, A Hoecker, MR Hoeferkamp, J Hoffman, D Hoffmann, JI Hofmann, M Hohlfeld, SO Holmgren, JL Holzbauer, TM Hong, L Hooft van Huysduynen, J-Y Hostachy, S Hou, A Hoummada, J Howard, J Howarth, M Hrabovsky, I Hristova, J Hrivnac, T Hryn’ova, PJ Hsu, S-C Hsu, D Hu, X Hu, Z Hubacek, F Hubaut, F Huegging, A Huettmann, TB Huffman, EW Hughes, G Hughes, M Huhtinen, TA Hülsing, M Hurwitz, N Huseynov, J Huston, J Huth, G Iacobucci, G Iakovidis, I Ibragimov, L Iconomidou-Fayard, J Idarraga, P Iengo, O Igonkina, Y Ikegami, K Ikematsu, M Ikeno, D Iliadis, N Ilic, T Ince, P Ioannou, M Iodice, K Iordanidou, V Ippolito, A Irles Quiles, C Isaksson, M Ishino, M Ishitsuka, R Ishmukhametov, C Issever, S Istin, AV Ivashin, W Iwanski, H Iwasaki, JM Izen, V Izzo, B Jackson, JN Jackson, P Jackson, MR Jaekel, V Jain, K Jakobs, S Jakobsen, T Jakoubek, J Jakubek, DO Jamin, DK Jana, E Jansen, H Jansen, J Janssen, M Janus, RC Jared, G Jarlskog, L Jeanty, G-Y Jeng, I Jen-La Plante, D Jennens, P Jenni, J Jentzsch, C Jeske, S Jézéquel, MK Jha, H Ji, W Ji, J Jia, Y Jiang, M Jimenez Belenguer, S Jin, O Jinnouchi, MD Joergensen, D Joffe, KE Johansson, P Johansson, S Johnert, KA Johns, K Jon-And, G Jones, RWL Jones, TJ Jones, PM Jorge, KD Joshi, J Jovicevic, X Ju, CA Jung, RM Jungst, P Jussel, A Juste Rozas, M Kaci, A Kaczmarska, P Kadlecik, M Kado, H Kagan, M Kagan, E Kajomovitz, S Kalinin, S Kama, N Kanaya, M Kaneda, S Kaneti, T Kanno, VA Kantserov, J Kanzaki, B Kaplan, A Kapliy, D Kar, K Karakostas, N Karastathis, M Karnevskiy, SN Karpov, V Kartvelishvili, AN Karyukhin, L Kashif, G Kasieczka, RD Kass, A Kastanas, Y Kataoka, A Katre, J Katzy, V Kaushik, K Kawagoe, T Kawamoto, G Kawamura, S Kazama, VF Kazanin, MY Kazarinov, R Keeler, PT Keener, R Kehoe, M Keil, JS Keller, H Keoshkerian, O Kepka, BP Kerševan, S Kersten, K Kessoku, J Keung, F Khalil-zada, H Khandanyan, A Khanov, D Kharchenko, A Khodinov, A Khomich, TJ Khoo, G Khoriauli, A Khoroshilov, V Khovanskiy, E Khramov, J Khubua, H Kim, SH Kim, N Kimura, O Kind, BT King, M King, RSB King, SB King, J Kirk, AE Kiryunin, T Kishimoto, D Kisielewska, T Kitamura, T Kittelmann, K Kiuchi, E Kladiva, M Klein, U Klein, K Kleinknecht, M Klemetti, P Klimek, A Klimentov, R Klingenberg, JA Klinger, EB Klinkby, T Klioutchnikova, PF Klok, E-E Kluge, P Kluit, S Kluth, E Kneringer, EBFG Knoops, A Knue, BR Ko, T Kobayashi, M Kobel, M Kocian, P Kodys, S Koenig, P Koevesarki, T Koffas, E Koffeman, LA Kogan, S Kohlmann, F Kohn, Z Kohout, T Kohriki, T Koi, H Kolanoski, I Koletsou, J Koll, AA Komar, Y Komori, T Kondo, K Köneke, AC König, T Kono, AI Kononov, R Konoplich, N Konstantinidis, R Kopeliansky, S Koperny, L Köpke, AK Kopp, K Korcyl, K Kordas, A Korn, AA Korol, I Korolkov, EV Korolkova, VA Korotkov, O Kortner, S Kortner, VV Kostyukhin, S Kotov, VM Kotov, A Kotwal, C Kourkoumelis, V Kouskoura, A Koutsman, R Kowalewski, TZ Kowalski, W Kozanecki, AS Kozhin, V Kral, VA Kramarenko, G Kramberger, MW Krasny, A Krasznahorkay, JK Kraus, A Kravchenko, S Kreiss, J 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Far-infrared fine-structure line diagnostics of ultraluminous infrared galaxies

Astrophysical Journal 776:1 (2013)

Authors:

D Farrah, V Lebouteiller, HWW Spoon, J Bernard-Salas, C Pearson, D Rigopoulou, HA Smith, E González-Alfonso, DL Clements, A Efstathiou, D Cormier, J Afonso, SM Petty, K Harris, P Hurley, C Borys, A Verma, A Cooray, V Salvatelli

Abstract:

We present Herschel observations of 6 fine-structure lines in 25 ultraluminous infrared galaxies at z < 0.27. The lines, [O III]52 μm, [N III]57 μm, [O I]63 μm, [N II]122 μm, [O I]145 μm, and [C II]158 μm, are mostly single Gaussians with widths <600 km s-1 and luminosities of 107-109 LO. There are deficits in the [O I]63/L IR, [N II]/L IR, [O I]145/L IR, and [C II]/L IR ratios compared to lower luminosity systems. The majority of the line deficits are consistent with dustier H II regions, but part of the [C II] deficit may arise from an additional mechanism, plausibly charged dust grains. This is consistent with some of the [C II] originating from photodissociation regions or the interstellar medium (ISM). We derive relations between far-IR line luminosities and both the IR luminosity and star formation rate. We find that [N II] and both [O I] lines are good tracers of the IR luminosity and star formation rate. In contrast, [C II] is a poor tracer of the IR luminosity and star formation rate, and does not improve as a tracer of either quantity if the [C II] deficit is accounted for. The continuum luminosity densities also correlate with the IR luminosity and star formation rate. We derive ranges for the gas density and ultraviolet radiation intensity of 101 < n < 102.5 and 102.2 < G 0 < 103.6, respectively. These ranges depend on optical type, the importance of star formation, and merger stage. We do not find relationships between far-IR line properties and several other parameters: active galactic nucleus (AGN) activity, merger stage, mid-IR excitation, and SMBH mass. We conclude that these far-IR lines arise from gas heated by starlight, and that they are not strongly influenced by AGN activity. © 2013. The American Astronomical Society. All rights reserved.