MIGHTEE-HI: HI galaxy properties in the large scale structure environment at z ∼ 0.37 from a stacking experiment

Monthly Notices of the Royal Astronomical Society Oxford University Press (2024) stae713

Authors:

Francesco Sinigaglia, Giulia Rodighiero, Ed Elson, Alessandro Bianchetti, Mattia Vaccari, Natasha Maddox, Anastasia A Ponomareva, Bradley S Frank, Matt J Jarvis, Barbara Catinella, Luca Cortese, Sambit Roychowdhury, Maarten Baes, Jordan D Collier, Olivier Ilbert, Ali A Khostovan, Sushma Kurapati, Hengxing Pan, Isabella Prandoni, Sambatriniaina HA Rajohnson, Mara Salvato, Srikrishna Sekhar, Gauri Sharma

Abstract:

We present the first measurement of HI mass of star-forming galaxies in different large scale structure environments from a blind survey at z ∼ 0.37. In particular, we carry out a spectral line stacking analysis considering 2875 spectra of colour-selected star-forming galaxies undetected in HI at 0.23 < z < 0.49 in the COSMOS field, extracted from the MIGHTEE-HI Early Science datacubes, acquired with the MeerKAT radio telescope. We stack galaxies belonging to different subsamples depending on three different definitions of large scale structure environment: local galaxy overdensity, position inside the host dark matter halo (central, satellite, or isolated), and cosmic web type (field, filament, or knot). We first stack the full star-forming galaxy sample and find a robust HI detection yielding an average galaxy HI mass of MHI = (8.12 ± 0.75) × 109 M⊙ at ∼11.8σ. Next, we investigate the different subsamples finding a negligible difference in MHI as a function of the galaxy overdensity. We report an HI excess compared to the full sample in satellite galaxies (MHI = (11.31 ± 1.22) × 109, at ∼10.2σ) and in filaments (MHI = (11.62 ± 0.90) × 109. Conversely, we report non-detections for the central and knot galaxies subsamples, which appear to be HI-deficient. We find the same qualitative results also when stacking in units of HI fraction (fHI). We conclude that the HI amount in star-forming galaxies at the studied redshifts correlates with the large scale structure environment.

Quaia, the Gaia-unWISE Quasar Catalog: An All-sky Spectroscopic Quasar Sample

Astrophysical Journal 964:1 (2024)

Authors:

K Storey-Fisher, DW Hogg, HW Rix, AC Eilers, G Fabbian, MR Blanton, D Alonso

Abstract:

We present a new, all-sky quasar catalog, Quaia, that samples the largest comoving volume of any existing spectroscopic quasar sample. The catalog draws on the 6,649,162 quasar candidates identified by the Gaia mission that have redshift estimates from the space observatory’s low-resolution blue photometer/red photometer spectra. This initial sample is highly homogeneous and complete, but has low purity, and 18% of even the bright (G < 20.0) confirmed quasars have discrepant redshift estimates (∣Δz/(1 + z)∣ > 0.2) compared to those from the Sloan Digital Sky Survey (SDSS). In this work, we combine the Gaia candidates with unWISE infrared data (based on the Wide-field Infrared Survey Explorer survey) to construct a catalog useful for cosmological and astrophysical quasar studies. We apply cuts based on proper motions and colors, reducing the number of contaminants by approximately four times. We improve the redshifts by training a k-Nearest Neighbor model on SDSS redshifts, and achieve estimates on the G < 20.0 sample with only 6% (10%) catastrophic errors with ∣Δz/(1 + z)∣ > 0.2 (0.1), a reduction of approximately three times (approximately two times) compared to the Gaia redshifts. The final catalog has 1,295,502 quasars with G < 20.5, and 755,850 candidates in an even cleaner G < 20.0 sample, with accompanying rigorous selection function models. We compare Quaia to existing quasar catalogs, showing that its large effective volume makes it a highly competitive sample for cosmological large-scale structure analyses. The catalog is publicly available at 10.5281/zenodo.10403370.

The Weird and the Wonderful in Our Solar System: Searching for Serendipity in the Legacy Survey of Space and Time

The Astronomical Journal American Astronomical Society 167:3 (2024) 118

Authors:

Brian Rogers, Chris J Lintott, Steve Croft, Megan E Schwamb, James RA Davenport

Ages, metallicity, and α-enhancement of the globular cluster populations in NGC 3311

Astronomy & Astrophysics EDP Sciences 683 (2024) a8

Authors:

Natalie Grasser, Magda Arnaboldi, Carlos Eduardo Barbosa, Chiara Spiniello, Lodovico Coccato, John Trevor Mendel

Measurement of the Centrality Dependence of the Dijet Yield in p+Pb Collisions at sqrt[s_{NN}]=8.16  TeV with the ATLAS Detector.

Physical review letters 132:10 (2024) 102301

Authors:

G Aad, B Abbott, K Abeling, NJ Abicht, SH Abidi, A Aboulhorma, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, C Adam Bourdarios, L Adamczyk, SV Addepalli, MJ Addison, J Adelman, A Adiguzel, T Adye, AA Affolder, Y Afik, MN Agaras, J Agarwala, A Aggarwal, C Agheorghiesei, A Ahmad, F Ahmadov, WS Ahmed, S Ahuja, X Ai, G Aielli, A Aikot, M Ait Tamlihat, B Aitbenchikh, I Aizenberg, M Akbiyik, TPA Åkesson, AV Akimov, D Akiyama, NN Akolkar, S Aktas, K Al Khoury, GL Alberghi, J Albert, P Albicocco, GL Albouy, S Alderweireldt, ZL Alegria, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, F Alfonsi, M Algren, M Alhroob, B Ali, HMJ Ali, S Ali, SW Alibocus, M Aliev, G Alimonti, W Alkakhi, C Allaire, BMM Allbrooke, JF Allen, CA Allendes Flores, PP Allport, A Aloisio, F Alonso, C Alpigiani, M Alvarez Estevez, A Alvarez Fernandez, M Alves Cardoso, MG Alviggi, M Aly, Y Amaral Coutinho, A Ambler, C Amelung, M Amerl, CG Ames, D Amidei, SP Amor Dos Santos, KR Amos, V Ananiev, C Anastopoulos, T Andeen, JK Anders, SY Andrean, A Andreazza, S Angelidakis, A Angerami, AV Anisenkov, A Annovi, C Antel, MT Anthony, E Antipov, M Antonelli, F Anulli, M Aoki, T Aoki, JA Aparisi Pozo, MA Aparo, L Aperio Bella, C Appelt, A Apyan, N Aranzabal, SJ Arbiol Val, C Arcangeletti, ATH Arce, E Arena, J-F Arguin, S Argyropoulos, J-H Arling, O Arnaez, H Arnold, G Artoni, H Asada, K Asai, S Asai, NA Asbah, J Assahsah, K Assamagan, R Astalos, S Atashi, RJ Atkin, M Atkinson, H Atmani, PA Atmasiddha, K Augsten, S Auricchio, AD Auriol, VA Austrup, G Avolio, K Axiotis, G Azuelos, D Babal, H Bachacou, K Bachas, A Bachiu, F Backman, A Badea, TM Baer, P Bagnaia, M Bahmani, D Bahner, AJ Bailey, VR Bailey, JT Baines, L Baines, OK Baker, E Bakos, D Bakshi Gupta, V Balakrishnan, R Balasubramanian, EM Baldin, P Balek, E Ballabene, F Balli, LM Baltes, WK Balunas, J Balz, E Banas, M Bandieramonte, A Bandyopadhyay, S Bansal, L Barak, M Barakat, EL Barberio, D Barberis, M Barbero, MZ Barel, KN Barends, T Barillari, M-S Barisits, T Barklow, P Baron, DA Baron Moreno, A Baroncelli, G Barone, AJ Barr, JD Barr, L Barranco Navarro, F Barreiro, J Barreiro Guimarães da Costa, U Barron, MG Barros Teixeira, S Barsov, F Bartels, R Bartoldus, AE Barton, P Bartos, A Basan, M Baselga, A Bassalat, MJ Basso, CR Basson, RL Bates, S Batlamous, JR Batley, B Batool, M Battaglia, D Battulga, M Bauce, M Bauer, P Bauer, LT Bazzano Hurrell, JB Beacham, T Beau, JY Beaucamp, PH Beauchemin, F Becherer, P Bechtle, HP Beck, K Becker, AJ Beddall, VA Bednyakov, CP Bee, LJ Beemster, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, JF Beirer, F Beisiegel, M Belfkir, G Bella, L Bellagamba, A Bellerive, P Bellos, K Beloborodov, D Benchekroun, F Bendebba, Y Benhammou, M Benoit, JR Bensinger, S Bentvelsen, L Beresford, M Beretta, E Bergeaas Kuutmann, N Berger, B Bergmann, J Beringer, G Bernardi, C Bernius, FU Bernlochner, F Bernon, A Berrocal Guardia, T Berry, P Berta, A Berthold, IA Bertram, S Bethke, A Betti, AJ Bevan, NK Bhalla, M Bhamjee, S Bhatta, DS Bhattacharya, P Bhattarai, VS Bhopatkar, R Bi, RM Bianchi, G Bianco, O Biebel, R Bielski, M Biglietti, M Bindi, A Bingul, C Bini, A Biondini, CJ Birch-Sykes, GA Bird, M Birman, M Biros, S Biryukov, T Bisanz, E Bisceglie, JP Biswal, D Biswas, A Bitadze, K Bjørke, I Bloch, A Blue, U Blumenschein, J Blumenthal, GJ Bobbink, VS Bobrovnikov, M Boehler, B Boehm, D Bogavac, AG Bogdanchikov, C Bohm, V Boisvert, P Bokan, T Bold, M Bomben, M Bona, M Boonekamp, CD Booth, AG Borbély, IS Bordulev, HM Borecka-Bielska, G Borissov, D Bortoletto, D Boscherini, M Bosman, JD Bossio Sola, K Bouaouda, N Bouchhar, J Boudreau, EV Bouhova-Thacker, D Boumediene, R Bouquet, A Boveia, J Boyd, D Boye, IR Boyko, J Bracinik, N Brahimi, G Brandt, O Brandt, F Braren, B Brau, JE Brau, R Brener, L Brenner, R Brenner, S Bressler, D Britton, D Britzger, I Brock, G Brooijmans, WK Brooks, E Brost, LM Brown, LE Bruce, TL Bruckler, PA Bruckman de Renstrom, B Brüers, A Bruni, G Bruni, M Bruschi, N Bruscino, T Buanes, Q Buat, D Buchin, AG Buckley, O Bulekov, BA Bullard, S Burdin, CD Burgard, AM Burger, B Burghgrave, O Burlayenko, JTP Burr, CD Burton, JC Burzynski, EL Busch, V Büscher, PJ Bussey, JM Butler, CM Buttar, JM Butterworth, W Buttinger, CJ Buxo Vazquez, AR Buzykaev, S Cabrera Urbán, L Cadamuro, D Caforio, H Cai, Y Cai, Y Cai, VMM Cairo, O Cakir, N Calace, P Calafiura, G Calderini, P Calfayan, G Callea, LP Caloba, D Calvet, S Calvet, TP Calvet, M Calvetti, R Camacho Toro, S Camarda, D Camarero Munoz, P Camarri, MT Camerlingo, D Cameron, C Camincher, M Campanelli, A Camplani, V Canale, A Canesse, J Cantero, Y Cao, F Capocasa, M Capua, A Carbone, R Cardarelli, JCJ Cardenas, F Cardillo, G Carducci, T Carli, G Carlino, JI Carlotto, BT Carlson, EM Carlson, L Carminati, A Carnelli, M Carnesale, S Caron, E Carquin, S Carrá, G Carratta, F Carrio Argos, JWS Carter, TM Carter, MP Casado, M Caspar, FL Castillo, L Castillo Garcia, V Castillo Gimenez, NF Castro, A Catinaccio, JR Catmore, V Cavaliere, N Cavalli, V Cavasinni, YC Cekmecelioglu, E Celebi, F Celli, MS Centonze, V Cepaitis, K Cerny, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, B Cervato, A Cervelli, G Cesarini, SA Cetin, D Chakraborty, J Chan, WY Chan, JD Chapman, E Chapon, B Chargeishvili, DG Charlton, M Chatterjee, C Chauhan, S Chekanov, SV Chekulaev, GA Chelkov, A Chen, B Chen, B Chen, H Chen, H Chen, J Chen, J Chen, M Chen, S Chen, SJ Chen, X Chen, X Chen, Y Chen, CL Cheng, HC Cheng, S Cheong, A Cheplakov, E Cheremushkina, E Cherepanova, R Cherkaoui El Moursli, E Cheu, K Cheung, L Chevalier, V Chiarella, G Chiarelli, N Chiedde, G Chiodini, AS Chisholm, A Chitan, M Chitishvili, MV Chizhov, K Choi, AR Chomont, Y Chou, EYS Chow, T Chowdhury, KL Chu, MC Chu, X Chu, J Chudoba, JJ Chwastowski, D Cieri, KM Ciesla, V Cindro, A Ciocio, F Cirotto, ZH Citron, M Citterio, DA Ciubotaru, A Clark, PJ Clark, C Clarry, JM Clavijo Columbie, SE Clawson, C Clement, J Clercx, Y Coadou, M Cobal, A Coccaro, RF Coelho Barrue, R Coelho Lopes De Sa, S Coelli, AEC Coimbra, B Cole, J Collot, P Conde Muiño, MP Connell, SH Connell, IA Connelly, EI Conroy, F Conventi, HG Cooke, AM Cooper-Sarkar, A Cordeiro Oudot Choi, LD Corpe, M Corradi, F Corriveau, A Cortes-Gonzalez, MJ Costa, F Costanza, D Costanzo, BM Cote, G Cowan, K Cranmer, D Cremonini, S Crépé-Renaudin, F Crescioli, M Cristinziani, M Cristoforetti, V Croft, JE Crosby, G Crosetti, A Cueto, T Cuhadar Donszelmann, H Cui, Z Cui, WR Cunningham, F Curcio, P Czodrowski, MM Czurylo, MJ Da Cunha Sargedas De Sousa, JV Da Fonseca Pinto, C Da Via, W Dabrowski, T Dado, S Dahbi, T Dai, D Dal Santo, C Dallapiccola, M Dam, G D'amen, V D'Amico, J Damp, JR Dandoy, MF Daneri, M Danninger, V Dao, G Darbo, S Darmora, SJ Das, S D'Auria, C David, T Davidek, B Davis-Purcell, I Dawson, HA Day-Hall, K De, R De Asmundis, N De Biase, S De Castro, N De Groot, P de Jong, H De la Torre, A De Maria, A De Salvo, U De Sanctis, F De Santis, A De Santo, JB De Vivie De Regie, DV Dedovich, J Degens, AM Deiana, F Del Corso, J Del Peso, F Del Rio, L Delagrange, F Deliot, CM Delitzsch, M Della Pietra, D Della Volpe, A Dell'Acqua, L Dell'Asta, M Delmastro, PA Delsart, S Demers, M Demichev, SP Denisov, L D'Eramo, D Derendarz, F Derue, P Dervan, K Desch, C Deutsch, FA Di Bello, A Di Ciaccio, L Di Ciaccio, A Di Domenico, C Di Donato, A Di Girolamo, G Di Gregorio, A Di Luca, B Di Micco, R Di Nardo, C Diaconu, M Diamantopoulou, FA Dias, T Dias Do Vale, MA Diaz, FG Diaz Capriles, M Didenko, EB Diehl, L Diehl, S Díez Cornell, C Diez Pardos, C Dimitriadi, A Dimitrievska, J Dingfelder, I-M Dinu, SJ Dittmeier, F Dittus, F Djama, T Djobava, JI Djuvsland, C Doglioni, A Dohnalova, J Dolejsi, Z Dolezal, KM Dona, M Donadelli, B Dong, J Donini, A D'Onofrio, M D'Onofrio, J Dopke, A Doria, N Dos Santos Fernandes, P Dougan, MT Dova, AT Doyle, MA Draguet, E Dreyer, I Drivas-Koulouris, M Drnevich, AS Drobac, M Drozdova, D Du, TA du Pree, F Dubinin, M Dubovsky, E Duchovni, G Duckeck, OA 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JL Gonski, RY González Andana, S González de la Hoz, S Gonzalez Fernandez, R Gonzalez Lopez, C Gonzalez Renteria, MV Gonzalez Rodrigues, R Gonzalez Suarez, S Gonzalez-Sevilla, GR Gonzalvo Rodriguez, L Goossens, B Gorini, E Gorini, A Gorišek, TC Gosart, AT Goshaw, MI Gostkin, S Goswami, CA Gottardo, SA Gotz, M Gouighri, V Goumarre, AG Goussiou, N Govender, I Grabowska-Bold, K Graham, E Gramstad, S Grancagnolo, M Grandi, CM Grant, PM Gravila, FG Gravili, HM Gray, M Greco, C Grefe, IM Gregor, P Grenier, SG Grewe, C Grieco, AA Grillo, K Grimm, S Grinstein, J-F Grivaz, E Gross, J Grosse-Knetter, C Grud, JC Grundy, L Guan, W Guan, C Gubbels, JGR Guerrero Rojas, G Guerrieri, F Guescini, R Gugel, JAM Guhit, A Guida, E Guilloton, S Guindon, F Guo, J Guo, L Guo, Y Guo, R Gupta, R Gupta, S Gurbuz, SS Gurdasani, G Gustavino, M Guth, P Gutierrez, LF Gutierrez Zagazeta, M Gutsche, C Gutschow, C Gwenlan, CB Gwilliam, ES Haaland, A Haas, M Habedank, C Haber, HK Hadavand, A Hadef, S Hadzic, AI Hagan, 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T Yamazaki, Y Yamazaki, J Yan, S Yan, Z Yan, HJ Yang, HT Yang, S Yang, T Yang, X Yang, X Yang, Y Yang, Y Yang, Z Yang, W-M Yao, YC Yap, H Ye, H Ye, J Ye, S Ye, X Ye, Y Yeh, I Yeletskikh, BK Yeo, MR Yexley, P Yin, K Yorita, S Younas, CJS Young, C Young, C Yu, Y Yu, M Yuan, R Yuan, L Yue, M Zaazoua, B Zabinski, E Zaid, ZK Zak, T Zakareishvili, N Zakharchuk, S Zambito, JA Zamora Saa, J Zang, D Zanzi, O Zaplatilek, C Zeitnitz, H Zeng, JC Zeng, DT Zenger, O Zenin, T Ženiš, S Zenz, S Zerradi, D Zerwas, M Zhai, B Zhang, DF Zhang, J Zhang, J Zhang, K Zhang, L Zhang, P Zhang, R Zhang, S Zhang, S Zhang, T Zhang, X Zhang, X Zhang, Y Zhang, Y Zhang, Y Zhang, Z Zhang, Z Zhang, H Zhao, T Zhao, Y Zhao, Z Zhao, A Zhemchugov, J Zheng, K Zheng, X Zheng, Z Zheng, D Zhong, B Zhou, H Zhou, N Zhou, Y Zhou, CG Zhu, J Zhu, Y Zhu, Y Zhu, X Zhuang, K Zhukov, V Zhulanov, NI Zimine, J Zinsser, M Ziolkowski, L Živković, A Zoccoli, K Zoch, TG Zorbas, O Zormpa, W Zou, L Zwalinski, ATLAS Collaboration

Abstract:

ATLAS measured the centrality dependence of the dijet yield using 165  nb^{-1} of p+Pb data collected at sqrt[s_{NN}]=8.16  TeV in 2016. The event centrality, which reflects the p+Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, R_{CP}, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The R_{CP} shows a scaling with the Bjorken x of the parton originating from the proton, x_{p}, while no such trend is observed as a function of x_{Pb}. This analysis provides unique input to understanding the role of small proton spatial configurations in p+Pb collisions by covering parton momentum fractions from the valence region down to x_{p}∼10^{-3} and x_{Pb}∼4×10^{-4}.