J/AJ/167/61 Systematically Measuring Ultra-diffuse Galaxies. VI (Lambert+, 2024)
Systematically Measuring Ultra-diffuse Galaxies (SMUDGes).
VI. Nuclear Star Clusters.
Lambert M., Khim D.J., Zaritsky D., Donnerstein R.
<Astron. J., 167, 61 (2024)>
=2024AJ....167...61L 2024AJ....167...61L
ADC_Keywords: Galaxies; Clusters, open; Photometry, VRI
Keywords: Low surface brightness galaxies ; Galaxy properties ; Galaxy
structure ; Galaxy nuclei ; Star clusters
Abstract:
We present our photometric search for potential nuclear star clusters
(NSCs) in ultra-diffuse galaxies (UDGs) as an extension of the SMUDGes
catalog. We identify 325 SMUDGes galaxies with NSCs and, from the 144
with existing distance estimates, identify 33NSC hosts as UDGs
(µ0,g≳24mag/arcsec2, re≳1.5kpc). The SMUDGes with NSCs lie
on the galaxy red sequence, satisfy the relationship between NSC and
host galaxy stellar masses, have a mean NSC stellar mass fraction of
0.02 but reach as high as 0.1, have NSCs that are displaced from the
host center with a standard deviation of 0.10re, and weakly favor
higher-density environments. All of these properties are consistent
with previous results from higher surface brightness galaxy samples,
allowing for at most a relatively weak dependence of NSC behavior on
host galaxy surface brightness.
Description:
We present the results of our photometric search for potential NSCs
hosted by the UDG candidates in the SMUDGes catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 67 7070 SMUDGes NSC extension catalog
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See also:
J/AJ/127/105 : Nuclear clusters in late-type spiral galaxies (Boker+, 2004)
J/MNRAS/445/2385 : HST/ACS Coma Cluster Survey. X. (den Brok+, 2014)
J/MNRAS/441/3570 : Nuclear clusters in 228 spiral galaxies (Georgiev+, 2014)
J/ApJ/855/142 : Next Generation Fornax Survey (NGFS) II (Eigenthaler+, 2018)
J/ApJ/878/18 : NGVS. XXIII. Nuclear star clusters (Sanchez-Janssen+, 2019)
J/ApJS/240/1 : SMUDGes. I. 1 results in the Coma Cluster (Zaritsky+, 2019)
J/ApJ/923/257 : Ultra-diffuse galaxies spectroscopic obs. (Kadowaki+, 2021)
J/MNRAS/506/5494 : MATLAS dwarfs structure and morphology (Poulain+, 2021)
J/ApJS/257/60 : SMUDGes. II. Expanded survey & Stripe 82 (Zaritsky+, 2021)
J/ApJS/261/11 : SMUDGes. III. The Southern catalog (Zaritsky+, 2022)
J/ApJS/267/27 : SMUDGes V. Complete catalog UDGs from DR9 (Zaritsky+, 2023)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- SMDG Galaxy name in SMDG catalog with coordinates
21- 25 F5.2 mag rmagUDG [13.9/25.7]? UDG r-band apparent magnitude in
two component model (1)
27- 31 F5.2 mag rmagNSC [19.8/25.3]? NSC r-band apparent magnitude in
two component model (1)
33- 36 F4.2 mag e_rmagNSC [0/0.6]? Uncertainty in rmagNSC
38- 42 F5.2 mag gmagNSC [20.7/29.3]? NSC g-band apparent magnitude in
two component model (1)
44- 47 F4.2 mag e_gmagNSC [0.01/8]? Uncertainty in gmagNSC
49- 53 F5.2 mag g-r [-0.11/1.24]? UDG g-r color (2)
55- 60 F6.2 arcsec re [2.95/403]? UDG effective radius (2)
62- 65 F4.2 --- ratio [0/1.39]? Ratio of separation between NSC and
host center to effective radius; rp/re
67- 67 I1 --- Class [1/7] NSC morphological classification (3)
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Note (1): Magnitudes refer to the S1 and N1,PSF components of the best fit
model. Magnitudes are not extinction corrected.
Note (2): Colors and effective radii refer to the above components derived
from the initial single Sersic fit.
Note (3): Classification as follows:
1 = S1;
2 = S1 + S2;
3 = S1 + N1,PSF?;
4 = S1 + N1,PSF;
5 = S1 + S2 + N1,PSF;
6 = failed fitting;
7 = galaxy excluded prior to fitting.
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History:
From electronic version of the journal
References:
Zaritsky et al. Paper I : 2019ApJS..240....1Z 2019ApJS..240....1Z Cat. J/ApJS/240/1
Zaritsky et al. Paper II : 2021ApJS..257...60Z 2021ApJS..257...60Z Cat. J/ApJS/257/60
Zaritsky et al. Paper III : 2022ApJS..261...11Z 2022ApJS..261...11Z Cat. J/ApJS/261/11
Goto et al. Paper IV : 2023AJ....166..185G 2023AJ....166..185G
Zaritsky et al. Paper V : 2023ApJS..267...27Z 2023ApJS..267...27Z Cat. J/ApJS/267/27
(End) Prepared by [AAS], Coralie Fix [CDS], 26-Apr-2024