TY - JOUR
T1 - JWST NIRCam Photometry
T2 - A Study of Globular Clusters Surrounding Bright Elliptical Galaxy VV 191a at z = 0.0513
AU - Berkheimer, Jessica M.
AU - Carleton, Timothy
AU - Windhorst, Rogier A.
AU - Keel, William C.
AU - Holwerda, Benne W.
AU - Nonino, Mario
AU - Cohen, Seth H.
AU - Jansen, Rolf A.
AU - Coe, Dan
AU - Conselice, Christopher J.
AU - Driver, Simon P.
AU - Frye, Brenda L.
AU - Grogin, Norman A.
AU - Koekemoer, Anton M.
AU - Lucas, Ray A.
AU - Marshall, Madeline A.
AU - Pirzkal, Nor
AU - Robertson, Clayton
AU - Robotham, Aaron
AU - Ryan, Russell E.
AU - Smith, Brent M.
AU - Summers, Jake
AU - Tompkins, Scott
AU - Willmer, Christopher N.A.
AU - Yan, Haojing
N1 - Publisher Copyright:
© 2024. The Author(s). Published by the American Astronomical Society.
PY - 2024/4/1
Y1 - 2024/4/1
N2 - 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 μm 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 ∼106.5 M ⊙, with metallicities [Fe/H] spanning the typical range expected for GCs (−2.5 ≲ [Fe/H]≲ 0.5). However, the models predict ∼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 ∼ −9.4 ± 0.2 mag in the F090W filter.
AB - 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 μm 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 ∼106.5 M ⊙, with metallicities [Fe/H] spanning the typical range expected for GCs (−2.5 ≲ [Fe/H]≲ 0.5). However, the models predict ∼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 ∼ −9.4 ± 0.2 mag in the F090W filter.
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U2 - 10.3847/2041-8213/ad2688
DO - 10.3847/2041-8213/ad2688
M3 - Article
AN - SCOPUS:85189362658
SN - 2041-8205
VL - 964
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L29
ER -