JWST NIRCam Photometry: A Study of Globular Clusters Surrounding Bright Elliptical Galaxy VV 191a at z=0.0513

被引：1

作者：

Berkheimer, Jessica M. ^{[1
]}

Carleton, Timothy ^{[1
]}

Windhorst, Rogier A. ^{[1
]}

Keel, William C. ^{[2
]}

Holwerda, Benne W. ^{[3
]}

Nonino, Mario ^{[4
]}

Cohen, Seth H. ^{[1
]}

Jansen, Rolf A. ^{[1
]}

Coe, Dan ^{[5
]}

Conselice, Christopher J. ^{[6
]}

Driver, Simon P. ^{[7
,8
]}

Frye, Brenda L. ^{[9
]}

Grogin, Norman A. ^{[10
]}

Koekemoer, Anton M. ^{[10
]}

Lucas, Ray A. ^{[10
]}

Marshall, Madeline A. ^{[11
]}

Pirzkal, Nor ^{[10
]}

Robertson, Clayton ^{[3
]}

Robotham, Aaron ^{[7
,8
]}

Ryan Jr, Russell E. ^{[9
]}

Smith, Brent M. ^{[1
]}

Summers, Jake ^{[1
]}

Tompkins, Scott ^{[1
]}

Willmer, Christopher N. A. ^{[9
]}

Yan, Haojing ^{[12
]}

机构：

[1] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[2] Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35404 USA

[3] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA

[4] INAF, Trieste Astron Observ, Via Bazzoni 2, I-34124 Trieste, Italy

[5] Space Telescope Sci Inst, AURA European Space Agcy ESA, 3700 San Martin Dr, Baltimore, MD 21218 USA

[6] Univ Manchester, Jodrell Bank Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, England

[7] Univ Western Australia, Int Ctr Radio Astron Res ICRAR, M468,35 Stirling Highway, Crawley, WA 6009, Australia

[8] Univ Western Australia, Int Space Ctr ISC, M468,35 Stirling Highway, Crawley, WA 6009, Australia

[9] Univ Arizona, Dept Astron, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA

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

[11] Herzberg Astron & Astrophys Res Ctr, Natl Res Council Canada, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[12] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2024年 / 964卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

HUBBLE-SPACE-TELESCOPE; DARK-MATTER HALOS; LUMINOSITY FUNCTION; INFRARED COLORS; STAR-FORMATION; SYSTEMS; STELLAR; AGE; DISTRIBUTIONS; CONSTRAINTS;

D O I：

10.3847/2041-8213/ad2688

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

James Webb Space Telescope NIRCam images have revealed 154 reliable globular cluster (GC) candidates around the z = 0.0513 elliptical galaxy VV 191a after subtracting 34 likely interlopers from background galaxies inside our search area. NIRCam broadband observations are made at 0.9-4.5 mu m using the F090W, F150W, F356W, and F444W filters. Using point-spread-function-matched photometry, the data are analyzed to present color-magnitude diagrams and color distributions that suggest a relatively uniform population of GCs, except for small fractions of reddest (5%-8%) and bluest (2%-4%) outliers. GC models in the F090W versus (F090W-F150W) diagram fit the NIRCam data well and show that the majority of GCs detected have a mass of similar to 10(6.5)M(circle dot), with metallicities [Fe/H] spanning the typical range expected for GCs (-2.5 less than or similar to [Fe/H]less than or similar to 0.5). However, the models predict similar to 0.3-0.4 mag bluer (F356W-F444W) colors than the NIRCam data for a reasonable range of GC ages, metallicities, and reddening. Although our data do not quite reach the luminosity function turnover, the measured luminosity function is consistent with previous measurements, suggesting an estimated peak at m(AB) similar to -9.4 +/- 0.2 mag in the F090W filter.

引用

页数：14