COOL-LAMPS. VI. Lens Model and New Constraints on the Properties of COOL J1241+2219, a Bright z=5 Lyman Break Galaxy and its z=1 Cluster Lens

被引：1

作者：

Klein, Maxwell ^{[1
]}

Sharon, Keren ^{[1
]}

Napier, Kate ^{[1
]}

Gladders, Michael D. ^{[2
,3
]}

Khullar, Gourav ^{[4
,5
]}

Bayliss, Matthew ^{[6
]}

Dahle, Hakon ^{[7
]}

Owens, M. Riley ^{[6
]}

Stark, Antony ^{[8
]}

Brownsberger, Sasha ^{[9
]}

Kim, Keunho J. ^{[6
]}

Kuchta, Nicole ^{[1
]}

Mahler, Guillaume ^{[10
,11
]}

Smith, Grace ^{[1
]}

Walker, Ryan ^{[1
]}

Gozman, Katya ^{[1
]}

Martinez, Michael N. ^{[12
]}

Acuna, Owen S. Matthews ^{[12
]}

Merz, Kaiya ^{[13
]}

Sanchez, Jorge A. ^{[14
]}

Stein, Daniel J. Kavin ^{[2
]}

Sukay, Ezra O. ^{[15
]}

Tavangar, Kiyan ^{[16
]}

机构：

[1] Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 USA

[2] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[3] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[4] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[5] Univ Pittsburgh, PITT PACC, Pittsburgh, PA 15260 USA

[6] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

[7] Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway

[8] Ctr Astrophys, Harvard & Smithsonian, Observ Bldg,60 Garden St, Cambridge, MA 02138 USA

[9] Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA

[10] Univ Durham, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England

[11] Univ Durham, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England

[12] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[13] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[14] Sch Earth & Space Explorat, 781 Terrace Mall, Tempe, AZ 85287 USA

[15] Johns Hopkins Univ, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA

[16] Columbia Univ, Dept Astron, 550 West 120th St, New York, NY 10027 USA

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 963卷 / 01期

关键词：

STAR-FORMATION; MAGNIFIED STAR; MASS; REIONIZATION; DISCOVERY; SAMPLE; CORE; SPECTROSCOPY; POPULATIONS; CANDIDATES;

D O I：

10.3847/1538-4357/ad22de

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a strong lensing analysis of COOL J1241+2219, the brightest known gravitationally lensed galaxy at z >= 5, based on new multiband Hubble Space Telescope (HST) imaging data. The lensed galaxy has a redshift of z = 5.043, placing it shortly after the end of the "Epoch of Reionization," and an AB magnitude z(AB) = 20.47 mag (Khullar et al.). As such, it serves as a touchstone for future research of that epoch. The high spatial resolution of HST reveals internal structure in the giant arc, from which we identify 15 constraints and construct a robust lens model. We use the lens model to extract the cluster mass and lensing magnification. We find that the mass enclosed within the Einstein radius of the z = 1.001 cluster lens is M (<5.'' 77) = 1.079(-0.007)(+0.023 )x 10(13)M(circle dot), significantly lower than other known strong lensing clusters at its redshift. The average magnification of the giant arc is <mu(arc)> = 76(-20)(+40), a factor of 2.4(-0.7)(+1.4) greater than previously estimated from ground-based data; the flux-weighted average magnification is <mu(arc)> = 92(-31)(+37). We update the current measurements of the stellar mass and star formation rate (SFR) of the source for the revised magnification to log(M-star/M-circle dot)= 9.7 +/- 0.3 and SFR = 10.3(-4.4)(+7.0) M-circle dot yr(-1), respectively. The powerful lensing magnification acting upon COOL J1241+2219 resolves the source and enables future studies of the properties of its star formation on a clump-by-clump basis. The lensing analysis presented here will support upcoming multiwavelength characterization with HST and JWST data of the stellar mass assembly and physical properties of this high-redshift lensed galaxy.

引用

页数：9