A New Einstein Cross Gravitational Lens of a Lyman-break Galaxy

被引：5

作者：

Bettoni, Daniela ^{[1
]}

Falomo, Renato ^{[1
]}

Scarpa, Riccardo ^{[2
,3
]}

Negrello, Mattia ^{[4
]}

Omizzolo, Alessando ^{[1
,5
]}

Corradi, Romano L. M. ^{[2
,3
]}

Reverte, Daniel ^{[2
,3
]}

Vulcani, Benedetta ^{[1
]}

机构：

[1] Osserv Astron Padova, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy

[2] GRANTECAN, Cuesta San Jos S-N, E-38712 Brea Baja, La Palma, Spain

[3] Inst Astrofis Canarias, Via Lactea S-N, E-38200 Tenerife, Spain

[4] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[5] Vatican Observ, Vatican City, Vatican

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 873卷 / 02期

关键词：

galaxies: elliptical and lenticular; cD; galaxies: high-redshift; gravitational lensing: strong; techniques: spectroscopic; HE; 0435-1223; QUASARS; H-0;

D O I：

10.3847/2041-8213/ab0aeb

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the study of an "Einstein Cross" configuration first identified in a set of HST images by Cerny et al. Deep spectroscopic observations obtained at the Spanish 10.4 m Gran Telescopio Canarias telescope, allowed us to demonstrate the lens nature of the system, that consists of a Lyman-break galaxy (LBG), not a quasi-stellar object as is usually the case, at z = 3.03 lensed by a galaxy at z = 0.556. Combining the new spectroscopy with the archival HST data, it turns out that the lens is an elliptical galaxy with M-v = -21.0, effective radius 2.8 kpc, and stellar velocity dispersion sigma = 208 +/- 39 km s(-1) . The source is an LBG with Ly alpha luminosity similar to L* at that redshift. From the modeling of the system, performed by assuming a singular isothermal ellipsoid (SIE) with external shear, we estimate that the flux source is magnified about 4.5 times, and the velocity dispersion of the lens is sigma(SIE) = 197.9(-1.3)(+2.6) km s(-1) , in good agreement with the value derived spectroscopically. This is the second case known of an Einstein cross of an LBG.

引用

页数：5

共 28 条

[1] Quasar lenses and pairs in the VST-ATLAS and Gaia [J].

Agnello, A. ;

Schechter, P. L. ;

Morgan, N. D. ;

Treu, T. ;

Grillo, C. ;

Malesani, D. ;

Anguita, T. ;

Apostolovski, Y. ;

Rusu, C. E. ;

Motta, V. ;

Rojas, K. ;

Chehade, B. ;

Shanks, T. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 475 (02) :2086-2096

[2] A new Einstein cross:: A highly magnified, intrinsically faint Lyα emitter at z=2.7 [J].

Bolton, Adam S. ;

Moustakas, Leonidas A. ;

Stern, Daniel ;

Burles, Scott ;

Dey, Arjun ;

Spinrad, Hyron .

ASTROPHYSICAL JOURNAL, 2006, 646 (01) :L45-L48

[3] H0LiCOW-V. New COSMOGRAIL time delays of HE 0435-1223: H0 to 3.8 per cent precision from strong lensing in a flat ΛCDM model [J].

Bonvin, V. ;

Courbin, F. ;

Suyu, S. H. ;

Marshall, P. J. ;

Rusu, C. E. ;

Sluse, D. ;

Tewes, M. ;

Wong, K. C. ;

Collett, T. ;

Fassnacht, C. D. ;

Treu, T. ;

Auger, M. W. ;

Hilbert, S. ;

Koopmans, L. V. E. ;

Meylan, G. ;

Rumbaugh, N. ;

Sonnenfeld, A. ;

Spiniello, C. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 465 (04) :4914-4930

[4] Parametric recovery of line-of-sight velocity distributions from absorption-line spectra of galaxies via penalized likelihood [J].

Cappellari, M ;

Emsellem, E .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2004, 116 (816) :138-147

[5] OSIRIS tunable imager and spectrograph-for the GTC. instrument status. [J].

Cepa, J ;

Aguiar, M ;

Bland-Hawthorn, J ;

Castañeda, H ;

Cobos, F ;

Correa, S ;

Espejo, C ;

Fragoso, AB ;

Fuentes, J ;

Gigante, JV ;

González, J ;

González-Escalera, V ;

González-Serrano, JI ;

Joven, E ;

López, JC ;

Militello, C ;

Peraza, L ;

Pérez, A ;

Pérez, J ;

Rasilla, JL ;

Sánchez, B ;

Tejada, C .

INSTRUMENT DESIGN AND PERFORMANCE FOR OPTICAL/INFRARED GROUND-BASED TELESCOPES, PTS 1-3, 2003, 4841 :1739-1749

[6] RELICS: Strong Lens Models for Five Galaxy Clusters from the Reionization Lensing Cluster Survey [J].

Cerny, Catherine ;

Sharon, Keren ;

Andrade-Santos, Felipe ;

Avila, Roberto J. ;

Bradac, Marusa ;

Bradley, Larry D. ;

Carrasco, Daniela ;

Coe, Dan ;

Czakon, Nicole G. ;

Dawson, William A. ;

Frye, Brenda L. ;

Hoag, Austin ;

Huang, Kuang-Han ;

Johnson, Traci L. ;

Jones, Christine ;

Lam, Daniel ;

Lovisari, Lorenzo ;

Mainali, Ramesh ;

Oesch, Pascal A. ;

Ogaz, Sara ;

Past, Matthew ;

Paterno-Mahler, Rachel ;

Peterson, Avery ;

Riess, Adam G. ;

Rodney, Steven A. ;

Ryan, Russell E. ;

Salmon, Brett ;

Sendra-Server, Irene ;

Stark, Daniel P. ;

Strolger, Louis-Gregory ;

Trenti, Michele ;

Umetsu, Keiichi ;

Vulcani, Benedetta ;

Zitrin, Adi .

ASTROPHYSICAL JOURNAL, 2018, 859 (02)

[7] The Herschel-ATLAS: magnifications and physical sizes of 500-μm-selected strongly lensed galaxies [J].

Enia, A. ;

Negrello, M. ;

Gurwell, M. ;

Dye, S. ;

Rodighiero, G. ;

Massardi, M. ;

De Zotti, G. ;

Franceschini, A. ;

Cooray, A. ;

van der Werf, P. ;

Birkinshaw, M. ;

Michalowski, M. J. ;

Oteo, I. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 475 (03) :3467-3484

[8] emcee: The MCMC Hammer [J].

Foreman-Mackey, Daniel ;

Hogg, David W. ;

Lang, Dustin ;

Goodman, Jonathan .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2013, 125 (925) :306-312

[9] A LIBRARY OF STELLAR SPECTRA [J].

JACOBY, GH ;

HUNTER, DA ;

CHRISTIAN, CA .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1984, 56 (02) :257-281

[10] KECK SPECTROSCOPY OF FAINT 3 < z < 7 LYMAN BREAK GALAXIES. III. THE MEAN ULTRAVIOLET SPECTRUM AT z ≃ 4 [J].

Jones, Tucker ;

Stark, Daniel P. ;

Ellis, Richard S. .

ASTROPHYSICAL JOURNAL, 2012, 751 (01)

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