Scintillation light detection in the 6-m drift-length ProtoDUNE Dual Phase liquid argon TPC.

The European physical journal. C, Particles and fields 82:7 (2022) 618

Authors:

A Abed Abud, B Abi, R Acciarri, MA Acero, MR Adames, G Adamov, M Adamowski, D Adams, M Adinolfi, A Aduszkiewicz, J Aguilar, Z Ahmad, J Ahmed, B Aimard, B Ali-Mohammadzadeh, T Alion, K Allison, S Alonso Monsalve, M AlRashed, C Alt, A Alton, R Alvarez, P Amedo, J Anderson, C Andreopoulos, M Andreotti, M Andrews, F Andrianala, S Andringa, N Anfimov, A Ankowski, M Antoniassi, M Antonova, A Antoshkin, S Antusch, A Aranda-Fernandez, L Arellano, LO Arnold, MA Arroyave, J Asaadi, L Asquith, A Aurisano, V Aushev, D Autiero, V Ayala Lara, M Ayala-Torres, F Azfar, A Back, H Back, JJ Back, C Backhouse, I Bagaturia, L Bagby, N Balashov, S Balasubramanian, P Baldi, B Baller, B Bambah, F Barao, G Barenboim, P Barham Alzas, G Barker, W Barkhouse, C Barnes, G Barr, J Barranco Monarca, A Barros, N Barros, JL Barrow, A Basharina-Freshville, A Bashyal, V Basque, C Batchelor, E Batista das Chagas, JBR Battat, F Battisti, F Bay, MCQ Bazetto, JLL Bazo Alba, JF Beacom, E Bechetoille, B Behera, C Beigbeder, L Bellantoni, G Bellettini, V Bellini, O Beltramello, N Benekos, C Benitez Montiel, F Bento Neves, J Berger, S Berkman, P Bernardini, RM Berner, A Bersani, S Bertolucci, M Betancourt, A Betancur Rodríguez, A Bevan, Y Bezawada, TJC Bezerra, A Bhardwaj, V Bhatnagar, M Bhattacharjee, D Bhattarai, S Bhuller, B Bhuyan, S Biagi, J Bian, M Biassoni, K Biery, B Bilki, M Bishai, A Bitadze, A Blake, F Blaszczyk, GC Blazey, E Blucher, J Boissevain, S Bolognesi, T Bolton, L Bomben, M Bonesini, M Bongrand, C Bonilla-Diaz, F Bonini, A Booth, F Boran, S Bordoni, A Borkum, N Bostan, P Bour, C Bourgeois, D Boyden, J Bracinik, D Braga, D Brailsford, A Branca, A Brandt, J Bremer, D Breton, C Brew, SJ Brice, C Brizzolari, C Bromberg, J Brooke, A Bross, G Brunetti, M Brunetti, N Buchanan, H Budd, I Butorov, I Cagnoli, T Cai, D Caiulo, R Calabrese, P Calafiura, J Calcutt, M Calin, S Calvez, E Calvo, A Caminata, M Campanelli, D Caratelli, D Carber, JC Carceller, G Carini, B Carlus, MF Carneiro, P Carniti, I Caro Terrazas, H Carranza, T Carroll, JF Castaño Forero, A Castillo, C Castromonte, E Catano-Mur, C Cattadori, F Cavalier, G Cavallaro, F Cavanna, S Centro, G Cerati, A Cervelli, A Cervera Villanueva, M Chalifour, A Chappell, E Chardonnet, N Charitonidis, A Chatterjee, S Chattopadhyay, MSS Chavarry Neyra, H Chen, M Chen, Y Chen, Z Chen, Z Chen-Wishart, Y Cheon, D Cherdack, C Chi, S Childress, R Chirco, A Chiriacescu, G Chisnall, K Cho, S Choate, D Chokheli, PS Chong, A Christensen, D Christian, G Christodoulou, A Chukanov, M Chung, E Church, V Cicero, P Clarke, G Cline, TE Coan, AG Cocco, JAB Coelho, N Colton, E Conley, R Conley, J Conrad, M Convery, S Copello, P Cova, L Cremaldi, L Cremonesi, JI Crespo-Anadón, M Crisler, E Cristaldo, J Crnkovic, R Cross, A Cudd, C Cuesta, Y Cui, D Cussans, O Dalager, H da Motta, L Da Silva Peres, C David, Q David, GS Davies, S Davini, J Dawson, K De, S De, P Debbins, I De Bonis, MP Decowski, A De Gouvêa, PC De Holanda, IL De Icaza Astiz, A Deisting, P De Jong, A Delbart, D Delepine, M Delgado, A Dell'Acqua, N Delmonte, P De Lurgio, JRT de Mello Neto, DM DeMuth, S Dennis, C Densham, GW Deptuch, A De Roeck, V De Romeri, G De Souza, R Devi, R Dharmapalan, M Dias, F Diaz, JS Díaz, S Di Domizio, L Di Giulio, P Ding, L Di Noto, G Dirkx, C Distefano, R Diurba, M Diwan, Z Djurcic, D Doering, S Dolan, F Dolek, M Dolinski, L Domine, Y Donon, D Douglas, D Douillet, A Dragone, G Drake, F Drielsma, L Duarte, D Duchesneau, K Duffy, P Dunne, B Dutta, H Duyang, O Dvornikov, D Dwyer, A Dyshkant, M Eads, A Earle, D Edmunds, J Eisch, L Emberger, S Emery, P Englezos, A Ereditato, T Erjavec, C Escobar, G Eurin, JJ Evans, E Ewart, AC Ezeribe, K Fahey, A Falcone, M Fani', C Farnese, Y Farzan, D Fedoseev, J Felix, Y Feng, E Fernandez-Martinez, P Fernandez Menendez, M Fernandez Morales, F Ferraro, L Fields, P Filip, F Filthaut, M Fiorini, V Fischer, RS Fitzpatrick, W Flanagan, B Fleming, R Flight, S Fogarty, W Foreman, J Fowler, W Fox, J Franc, K Francis, D Franco, J Freeman, J Freestone, J Fried, A Friedland, F Fuentes Robayo, S Fuess, IK Furic, K Furman, AP Furmanski, A Gabrielli, A Gago, H Gallagher, A Gallas, A Gallego-Ros, N Gallice, V Galymov, E Gamberini, T Gamble, F Ganacim, R Gandhi, R Gandrajula, F Gao, S Gao, D Garcia-Gamez, MÁ García-Peris, S Gardiner, D Gastler, J Gauvreau, G Ge, N Geffroy, B Gelli, A Gendotti, S Gent, Z Ghorbani-Moghaddam, P Giammaria, T Giammaria, N Giangiacomi, D Gibin, I Gil-Botella, S Gilligan, C Girerd, AK Giri, D Gnani, O Gogota, M Gold, S Gollapinni, K Gollwitzer, RA Gomes, LV Gomez Bermeo, LS Gomez Fajardo, F Gonnella, D Gonzalez-Diaz, M Gonzalez-Lopez, MC Goodman, O Goodwin, S Goswami, C Gotti, E Goudzovski, C Grace, R Gran, E Granados, P Granger, A Grant, C Grant, D Gratieri, P Green, L Greenler, J Greer, J Grenard, WC Griffith, M Groh, J Grudzinski, K Grzelak, W Gu, E Guardincerri, V Guarino, M Guarise, R Guenette, E Guerard, M Guerzoni, D Guffanti, A Guglielmi, B Guo, A Gupta, V Gupta, KK Guthikonda, R Gutierrez, P Guzowski, MM Guzzo, S Gwon, C Ha, K Haaf, A Habig, H Hadavand, R Haenni, A Hahn, J Haiston, P Hamacher-Baumann, T Hamernik, P Hamilton, J Han, DA Harris, J Hartnell, T Hartnett, J Harton, T Hasegawa, C Hasnip, R Hatcher, KW Hatfield, A Hatzikoutelis, C Hayes, K Hayrapetyan, J Hays, E Hazen, M He, A Heavey, KM Heeger, J Heise, S Henry, MA Hernandez Morquecho, K Herner, J Hewes, C Hilgenberg, T Hill, SJ Hillier, A Himmel, E Hinkle, LR Hirsch, J Ho, J Hoff, A Holin, E Hoppe, GA Horton-Smith, M Hostert, A Hourlier, B Howard, R Howell, J Hoyos, I Hristova, MS Hronek, J Huang, Z Hulcher, G Iles, N Ilic, AM Iliescu, R Illingworth, G Ingratta, A Ioannisian, B Irwin, L Isenhower, R Itay, CM Jackson, V Jain, E James, W Jang, B Jargowsky, F Jediny, D Jena, YS Jeong, C Jesús-Valls, X Ji, L Jiang, S Jiménez, A Jipa, R Johnson, W Johnson, N Johnston, B Jones, S Jones, M Judah, CK Jung, T Junk, Y Jwa, M Kabirnezhad, A Kaboth, I Kadenko, I Kakorin, A Kalitkina, D Kalra, F Kamiya, N Kaneshige, DM Kaplan, G Karagiorgi, G Karaman, A Karcher, M Karolak, Y Karyotakis, S Kasai, SP Kasetti, L Kashur, N Kazaryan, E Kearns, P Keener, KJ Kelly, E Kemp, O Kemularia, W Ketchum, SH Kettell, M Khabibullin, A Khotjantsev, A Khvedelidze, D Kim, B King, B Kirby, M Kirby, J Klein, A Klustova, T Kobilarcik, K Koehler, LW Koerner, DH Koh, S Kohn, PP Koller, L Kolupaeva, D Korablev, M Kordosky, T Kosc, U Kose, VA Kostelecký, K Kothekar, R Kralik, L Kreczko, F Krennrich, I Kreslo, W Kropp, T Kroupova, S Kubota, Y Kudenko, VA Kudryavtsev, S Kulagin, J Kumar, P Kumar, P Kunze, N Kurita, C Kuruppu, V Kus, T Kutter, J Kvasnicka, D Kwak, A Lambert, B Land, CE Lane, K Lang, T Langford, M Langstaff, J Larkin, P Lasorak, D Last, A Laundrie, G Laurenti, A Lawrence, I Lazanu, R LaZur, M Lazzaroni, T Le, S Leardini, J Learned, P LeBrun, T LeCompte, C Lee, SY Lee, G Lehmann Miotto, R Lehnert, MA Leigui de Oliveira, M Leitner, LM Lepin, SW Li, Y Li, H Liao, CS Lin, Q Lin, S Lin, RA Lineros, J Ling, A Lister, BR Littlejohn, J Liu, Y Liu, S Lockwitz, T Loew, M Lokajicek, I Lomidze, K Long, T Lord, JM LoSecco, WC Louis, X-G Lu, KB Luk, B Lunday, X Luo, E Luppi, T Lux, VP Luzio, J Maalmi, D MacFarlane, AA Machado, P Machado, CT Macias, JR Macier, A Maddalena, A Madera, P Madigan, S Magill, K Mahn, A Maio, A Major, JA Maloney, G Mandrioli, RC Mandujano, J Maneira, L Manenti, S Manly, A Mann, K Manolopoulos, M Manrique Plata, VN Manyam, L Manzanillas, M Marchan, A Marchionni, W Marciano, D Marfatia, C Mariani, J Maricic, R Marie, F Marinho, AD Marino, D Marsden, M Marshak, C Marshall, J Marshall, J Marteau, J Martín-Albo, N Martinez, DA Martinez Caicedo, P Martínez Miravé, S Martynenko, V Mascagna, K Mason, A Mastbaum, F Matichard, S Matsuno, J Matthews, C Mauger, N Mauri, K Mavrokoridis, I Mawby, R Mazza, A Mazzacane, E Mazzucato, T McAskill, E McCluskey, N McConkey, KS McFarland, C McGrew, A McNab, A Mefodiev, P Mehta, P Melas, O Mena, H Mendez, P Mendez, DP Méndez, A Menegolli, G Meng, MD Messier, W Metcalf, T Mettler, M Mewes, H Meyer, T Miao, G Michna, T Miedema, V Mikola, R Milincic, G Miller, W Miller, J Mills, O Mineev, A Minotti, OG Miranda, S Miryala, CS Mishra, SR Mishra, A Mislivec, M Mitchell, D Mladenov, I Mocioiu, K Moffat, N Moggi, R Mohanta, TA Mohayai, N Mokhov, J Molina, L Molina Bueno, E Montagna, A Montanari, C Montanari, D Montanari, LM Montañno Zetina, SH Moon, M Mooney, AF Moor, D Moreno, D Moretti, C Morris, C Mossey, M Mote, E Motuk, CA Moura, J Mousseau, G Mouster, W Mu, L Mualem, J Mueller, M Muether, S Mufson, F Muheim, A Muir, M Mulhearn, D Munford, H Muramatsu, S Murphy, J Musser, J Nachtman, S Nagu, M Nalbandyan, R Nandakumar, D Naples, S Narita, A Nath, A Navrer-Agasson, N Nayak, M Nebot-Guinot, K Negishi, JK Nelson, J Nesbit, M Nessi, D Newbold, M Newcomer, H Newton, R Nichol, F Nicolas-Arnaldos, A Nikolica, E Niner, K Nishimura, A Norman, A Norrick, R Northrop, P Novella, JA Nowak, M Oberling, J Ochoa-Ricoux, A Olivier, A Olshevskiy, Y Onel, Y Onishchuk, J Ott, L Pagani, G Palacio, O Palamara, S Palestini, JM Paley, M Pallavicini, C Palomares, W Panduro Vazquez, E Pantic, V Paolone, V Papadimitriou, R Papaleo, A Papanestis, S Paramesvaran, S Parke, E Parozzi, Z Parsa, M Parvu, S Pascoli, L Pasqualini, J Pasternak, J Pater, C Patrick, L Patrizii, RB Patterson, SJ Patton, T Patzak, A Paudel, B Paulos, L Paulucci, Z Pavlovic, G Pawloski, D Payne, V Pec, SJM Peeters, A Pena Perez, E Pennacchio, A Penzo, OLG Peres, J Perry, D Pershey, G Pessina, G Petrillo, C Petta, R Petti, V Pia, F Piastra, L Pickering, F Pietropaolo, VL Pimentel, G Pinaroli, K Plows, R Plunkett, R Poling, F Pompa, X Pons, N Poonthottathil, F Poppi, S Pordes, J Porter, M Potekhin, R Potenza, BVKS Potukuchi, J Pozimski, M Pozzato, S Prakash, T Prakash, M Prest, S Prince, F Psihas, D Pugnere, X Qian, JL Raaf, V Radeka, J Rademacker, B Radics, A Rafique, E Raguzin, M Rai, M Rajaoalisoa, I Rakhno, A Rakotonandrasana, L Rakotondravohitra, R Rameika, MA Ramirez Delgado, B Ramson, A Rappoldi, G Raselli, P Ratoff, S Raut, RF Razakamiandra, EM Rea, JS Real, B Rebel, R Rechenmacher, M Reggiani-Guzzo, J Reichenbacher, SD Reitzner, H Rejeb Sfar, A Renshaw, S Rescia, F Resnati, M Ribas, S Riboldi, C Riccio, G Riccobene, LCJ Rice, JS Ricol, A Rigamonti, Y Rigaut, EV Rincón, H Ritchie-Yates, D Rivera, A Robert, L Rochester, M Roda, P Rodrigues, MJ Rodriguez Alonso, E Rodriguez Bonilla, J Rodriguez Rondon, S Rosauro-Alcaraz, M Rosenberg, P Rosier, B Roskovec, M Rossella, M Rossi, J Rout, P Roy, A Rubbia, C Rubbia, B Russell, D Ruterbories, A Rybnikov, A Saa-Hernandez, R Saakyan, S Sacerdoti, T Safford, N Sahu, K Sakashita, P Sala, N Samios, O Samoylov, MC Sanchez, V Sandberg, DA Sanders, D Sankey, S Santana, M Santos-Maldonado, N Saoulidou, P Sapienza, C Sarasty, I Sarcevic, G Savage, V Savinov, A Scaramelli, A Scarff, A Scarpelli, T Schefke, H Schellman, S Schifano, P Schlabach, D Schmitz, AW Schneider, K Scholberg, A Schukraft, E Segreto, A Selyunin, CR Senise, J Sensenig, A Sergi, D Sgalaberna, MH Shaevitz, S Shafaq, F Shaker, M Shamma, R Sharankova, HR Sharma, R Sharma, RK Sharma, T Shaw, K Shchablo, C Shepherd-Themistocleous, A Sheshukov, S Shin, I Shoemaker, D Shooltz, R Shrock, H Siegel, L Simard, J Sinclair, G Sinev, J Singh, J Singh, L Singh, P Singh, V Singh, R Sipos, FW Sippach, G Sirri, A Sitraka, K Siyeon, K Skarpaas, A Smith, E Smith, P Smith, J Smolik, M Smy, E Snider, P Snopok, D Snowden-Ifft, M Soares Nunes, H Sobel, M Soderberg, S Sokolov, CJ Solano Salinas, S Söldner-Rembold, SR Soleti, N Solomey, V Solovov, WE Sondheim, M Sorel, A Sotnikov, J Soto-Oton, FA Soto Ugaldi, A Sousa, K Soustruznik, F Spagliardi, M Spanu, J Spitz, NJC Spooner, K Spurgeon, M Stancari, L Stanco, C Stanford, R Stein, HM Steiner, AF Steklain Lisbôa, J Stewart, B Stillwell, J Stock, F Stocker, T Stokes, M Strait, T Strauss, L Strigari, A Stuart, JG Suarez, JM Suárez Sunción, H Sullivan, D Summers, A Surdo, V Susic, L Suter, CM Sutera, R Svoboda, B Szczerbinska, AM Szelc, H Tanaka, S Tang, A Tapia, B Tapia Oregui, A Tapper, S Tariq, E Tarpara, N Tata, E Tatar, R Tayloe, AM Teklu, P Tennessen, M Tenti, K Terao, CA Ternes, F Terranova, G Testera, T Thakore, A Thea, JL Thompson, C Thorn, SC Timm, V Tishchenko, L Tomassetti, A Tonazzo, D Torbunov, M Torti, M Tortola, F Tortorici, N Tosi, D Totani, M Toups, C Touramanis, R Travaglini, J Trevor, S Trilov, WH Trzaska, Y Tsai, Y-T Tsai, Z Tsamalaidze, KV Tsang, N Tsverava, S Tufanli, C Tull, E Tyley, M Tzanov, L Uboldi, MA Uchida, J Urheim, T Usher, S Uzunyan, MR Vagins, P Vahle, S Valder, GDA Valdiviesso, E Valencia, R Valentim, Z Vallari, E Vallazza, JWF Valle, S Vallecorsa, R Van Berg, RG Van de Water, D Vanegas Forero, D Vannerom, F Varanini, D Vargas Oliva, G Varner, J Vasel, S Vasina, G Vasseur, N Vaughan, K Vaziri, S Ventura, A Verdugo, S Vergani, MA Vermeulen, M Verzocchi, M Vicenzi, H Vieira de Souza, C Vignoli, C Vilela, B Viren, T Vrba, T Wachala, AV Waldron, M Wallbank, C Wallis, H Wang, J Wang, L Wang, MHLS Wang, X Wang, Y Wang, Y Wang, K Warburton, D Warner, MO Wascko, D Waters, A Watson, K Wawrowska, P Weatherly, A Weber, M Weber, H Wei, A Weinstein, D Wenman, M Wetstein, A White, LH Whitehead, D Whittington, MJ Wilking, A Wilkinson, C Wilkinson, Z Williams, F Wilson, RJ Wilson, W Wisniewski, J Wolcott, T Wongjirad, A Wood, K Wood, E Worcester, M Worcester, K Wresilo, C Wret, W Wu, W Wu, Y Xiao, F Xie, B Yaeggy, E Yandel, G Yang, K Yang, T Yang, A Yankelevich, N Yershov, K Yonehara, YS Yoon, T Young, B Yu, H Yu, H Yu, J Yu, Y Yu, W Yuan, R Zaki, J Zalesak, L Zambelli, B Zamorano, A Zani, L Zazueta, GP Zeller, J Zennamo, K Zeug, C Zhang, S Zhang, Y Zhang, M Zhao, E Zhivun, G Zhu, ED Zimmerman, S Zucchelli, J Zuklin, V Zutshi, R Zwaska, DUNE Collaboration

Abstract:

DUNE is a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. ProtoDUNE Dual Phase (DP) is a 6  ×  6  ×  6 m 3 liquid argon time-projection-chamber (LArTPC) that recorded cosmic-muon data at the CERN Neutrino Platform in 2019-2020 as a prototype of the DUNE Far Detector. Charged particles propagating through the LArTPC produce ionization and scintillation light. The scintillation light signal in these detectors can provide the trigger for non-beam events. In addition, it adds precise timing capabilities and improves the calorimetry measurements. In ProtoDUNE-DP, scintillation and electroluminescence light produced by cosmic muons in the LArTPC is collected by photomultiplier tubes placed up to 7 m away from the ionizing track. In this paper, the ProtoDUNE-DP photon detection system performance is evaluated with a particular focus on the different wavelength shifters, such as PEN and TPB, and the use of Xe-doped LAr, considering its future use in giant LArTPCs. The scintillation light production and propagation processes are analyzed and a comparison of simulation to data is performed, improving understanding of the liquid argon properties.

The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) survey design, reductions, and detections

Astrophysical Journal American Astronomical Society 923:2 (2021) 217

Authors:

Karl Gebhardt, Erin Mentuch Cooper, Robin Ciardullo, Matthew Jarvis, Gavin Dalton

Abstract:

We describe the survey design, calibration, commissioning, and emission-line detection algorithms for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX is to measure the redshifts of over a million Lyα emitting galaxies between 1.88 < z < 3.52, in a 540 deg2 area encompassing a co-moving volume of 10.9 Gpc3. No pre-selection of targets is involved; instead the HETDEX measurements are accomplished via a spectroscopic survey using a suite of wide-field integral field units distributed over the focal plane of the telescope. This survey measures the Hubble expansion parameter and angular diameter distance, with a final expected accuracy of better than 1%. We detail the project’s observational strategy, reduction pipeline, source detection, and catalog generation, and present initial results for science verification in the COSMOS, Extended Groth Strip, and GOODS-N fields. We demonstrate that our data reach the required specifications in throughput, astrometric accuracy, flux limit, and object detection, with the end products being a catalog of emission-line sources, their object classifications, and flux-calibrated spectra.

The HETDEX instrumentation: Hobby-Eberly Telescope wide field upgrade and VIRUS

Astronomical Journal IOP Publishing 162:6 (2021) 298

Authors:

Gary J Hill, Hanshin Lee, Phillip J MacQueen, Andreas Kelz, NIv Drory, Brian L Vattiat, John M Good, Jason Ramsey, Herman Kriel, Trent Peterson, Dl DePoy, Karl Gebhardt, Jl Marshall, Sarah E Tuttle, Svend M Bauer, Taylor S Chonis, Maximillian H Fabricius, Cynthia Froning, Marco Haueser, Briana L Indahl, Thomas Jahn, Martin Landriau, Ron Leck, Francesco Montesano, Travis Prochaska

Abstract:

The Hobby–Eberly Telescope (HET) Dark Energy Experiment (HETDEX) is undertaking a blind wide-field low-resolution spectroscopic survey of 540 deg2 of sky to identify and derive redshifts for a million Lyα-emitting galaxies in the redshift range 1.9 < z < 3.5. The ultimate goal is to measure the expansion rate of the universe at this epoch, to sharply constrain cosmological parameters and thus the nature of dark energy. A major multiyear Wide-Field Upgrade (WFU) of the HET was completed in 2016 that substantially increased the field of view to 22' diameter and the pupil to 10 m, by replacing the optical corrector, tracker, and Prime Focus Instrument Package and by developing a new telescope control system. The new, wide-field HET now feeds the Visible Integral-field Replicable Unit Spectrograph (VIRUS), a new low-resolution integral-field spectrograph (LRS2), and the Habitable Zone Planet Finder, a precision near-infrared radial velocity spectrograph. VIRUS consists of 156 identical spectrographs fed by almost 35,000 fibers in 78 integral-field units arrayed at the focus of the upgraded HET. VIRUS operates in a bandpass of 3500−5500 Å with resolving power R ≃ 800. VIRUS is the first example of large-scale replication applied to instrumentation in optical astronomy to achieve spectroscopic surveys of very large areas of sky. This paper presents technical details of the HET WFU and VIRUS, as flowed down from the HETDEX science requirements, along with experience from commissioning this major telescope upgrade and the innovative instrumentation suite for HETDEX.

Rotation Curves in z ∼ 1–2 Star-forming Disks: Comparison of Dark Matter Fractions and Disk Properties for Different Fitting Methods

The Astrophysical Journal American Astronomical Society 922:2 (2021) 143

Authors:

SH Price, TT Shimizu, R Genzel, H Übler, NM Förster Schreiber, LJ Tacconi, RI Davies, RT Coogan, D Lutz, S Wuyts, E Wisnioski, A Nestor, A Sternberg, A Burkert, R Bender, A Contursi, RL Davies, R Herrera-Camus, M-J Lee, T Naab, R Neri, A Renzini, R Saglia, A Schruba, K Schuster

The SAMI Galaxy Survey: trends in [α/Fe] as a function of morphology and environment

Monthly Notices of the Royal Astronomical Society Oxford University Press 510:1 (2021) 1541-1556

Authors:

Peter J Watson, Roger L Davies, Sarah Brough, Scott M Croom, Francesco D'Eugenio, Karl Glazebrook, Brent Groves, Angel R Lopez-Sanchez, Jesse van de Sande, Nicholas Scott, Sam P Vaughan, Jakob Walcher, Joss Bland-Hawthorn, Julia J Bryant, Michael Goodwin, Jon S Lawrence, Nuria PF Lorente, Matt S Owers, Samuel Richards

Abstract:

We present a new set of index-based measurements of [α/Fe] for a sample of 2093 galaxies in the SAMI Galaxy Survey. Following earlier work, we fit a global relation between [α/Fe] and the galaxy velocity dispersion σ for red sequence galaxies, [α/Fe]=(0.378±0.009)log10(σ/100)+(0.155±0.003)⁠. We observe a correlation between the residuals and the local environmental surface density, whereas no such relation exists for blue cloud galaxies. In the full sample, we find that elliptical galaxies in high-density environments are α-enhanced by up to 0.057 ± 0.014 dex at velocity dispersions σ < 100 km s−1, compared with those in low-density environments. This α-enhancement is morphology-dependent, with the offset decreasing along the Hubble sequence towards spirals, which have an offset of 0.019 ± 0.014 dex. At low velocity dispersion and controlling for morphology, we estimate that star formation in high-density environments is truncated ∼1 Gyr earlier than in low-density environments. For elliptical galaxies only, we find support for a parabolic relationship between [α/Fe] and σ, with an environmental α-enhancement of at least 0.03 dex. This suggests strong contributions from both environment and mass-based quenching mechanisms. However, there is no evidence for this behaviour in later morphological types.