J/MNRAS/449/2937 HST BVI catalogue of star clusters in 5 HCGs (Fedotov+, 2015)
A comprehensive HST BVI catalogue of star clusters in five Hickson compact
groups of galaxies.
Fedotov K., Gallagher S.C., Durrell P.R., Bastian N., Konstantopoulos I.S.,
Charlton J., Johnson K.E., Chandar R.
<Mon. Not. R. Astron. Soc., 449, 2937-2973 (2015)>
=2015MNRAS.449.2937F 2015MNRAS.449.2937F (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry, UBVRI
Keywords: galaxies: evolution - galaxies: groups: general -
galaxies: interactions - galaxies: star clusters: general
Abstract:
We present a photometric catalogue of star cluster candidates in
Hickson compact groups (HCGs) 7, 31, 42, 59, and 92, based on
observations with the Advanced Camera for Surveys and the Wide Field
Camera 3 on the Hubble Space Telescope. The catalogue contains precise
cluster positions (right ascension and declination), magnitudes, and
colours in the BVI filters. The number of detected sources ranges from
2200 to 5600 per group, from which we construct the high-confidence
sample by applying a number of criteria designed to reduce foreground
and background contaminants. Furthermore, the high-confidence cluster
candidates for each of the 16 galaxies in our sample are split into
two subpopulations: one that may contain young star clusters and one
that is dominated by globular older clusters. The ratio of young star
cluster to globular cluster candidates varies from group to group,
from equal numbers to the extreme of HCG 31 which has a ratio of 8 to
1, due to a recent starburst induced by interactions in the group. We
find that the number of blue clusters with MV←9 correlates well
with the current star formation rate in an individual galaxy, while
the number of globular cluster candidates with MV←7.8 correlates
well (though with large scatter) with the stellar mass. Analyses of
the high-confidence sample presented in this paper show that star
clusters can be successfully used to infer the gross star formation
history of the host groups and therefore determine their placement in
a proposed evolutionary sequence for compact galaxy groups.
Description:
The data for this project were obtained with the Hubble Space
Telescope (HST) Advanced Camera for Surveys (ACS) and Wide Field
Camera 3 (WFC3). These observations are part of two programmes: ID
10787 (PI J. Charlton) and ID 11502 (PI K. Noll). The observations
were carried out in the F435W (F438W for WFC3), F606W, and F814W
filters, which are similar to the Johnson BVI bands. Hereafter, we
refer to the HST filters as B435, B438, V606, and I814, although we
did not make transformations to the Johnson-Cousins system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 66 20 HCG galaxies information
table9.dat 128 18113 BVI catalogue for SCs in HCGs
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See also:
VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- HCG Hickson Compact group number
3 A1 --- m_HCG [ABCDEFG] Multiplicity index on HCG
5- 16 A12 --- Name Other name
18- 19 I2 h RAh Right ascension (J2000)
21- 22 I2 min RAm Right ascension (J2000)
24- 27 F4.1 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 37 I2 arcsec DEs Declination (J2000)
39- 41 A3 --- MType Morphological type
42 A1 --- n_MType [afg] Note on MType (1)
44- 47 I4 km/s RV Radial velocity
48 A1 --- n_RV [be] Note on RV (2)
50- 54 F5.2 [Msun] logM* ?=- Stellar mass
55 A1 --- n_logM* [c] Note on logM* (3)
57- 60 F4.2 Msun/yr SFR ?=- Stellar formation rate
62- 65 F4.2 Msun/yr e_SFR ?=- rms uncertainty on SFR
66 A1 --- n_SFR [cdh] Note on SFR (4)
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Note (1): Note on MType as follows:
a = In RC3 galaxy listed as SB0
f = In RC3 galaxy listed as E?
g = In RC3 galaxy listed as S0
otherwise from Hickson et al. (1989ApJS...70..687H 1989ApJS...70..687H, Cat. VII/213)
Note (2): Note on RV as follows:
b = Nishiura et al. (2000AJ....120.1691N 2000AJ....120.1691N)
e = Mendes de Oliveira et al. (2006AJ....132..570M 2006AJ....132..570M)
otherwise from de Vaucouleurs et al. (1991, Cat. VII/155)
Note (3): Note on logM* as follows:
c = Stellar mass value listed is measured as the total mass of galaxies
31A and 31C
otherwise from Desjardins et al. (2014ApJ...790..132D 2014ApJ...790..132D)
Note (4): Note on SFR as follows:
c = Stellar mass value listed is measured as the total mass of galaxies
31A and 31C
d = SFR value listed is combined value of galaxies 31A, 31C, and 31E
h = Bitsakis et al. (2014, Cat. J/A+A/565/A25)
otherwise from Tzanavaris et al. (2010ApJ...716..556T 2010ApJ...716..556T)
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 11 F11.7 deg RAdeg Right Ascension (J2000)
13- 23 F11.7 deg DEdeg Declination (J2000)
25- 30 F6.3 mag F435Wmag Magnitude for B-band
(F435W; F438W for HCG 92)
32- 36 F5.3 mag e_F435Wmag rms uncertainty on F435Wmag
38- 43 F6.3 --- F435Wsharp Sharpness value for B-band
(F435W; F438W for HCG 92)
45- 50 F6.3 mag F606Wmag Magnitude for V-band (F606W)
52- 56 F5.3 mag e_F606Wmag rms uncertainty on F606Wmag
58- 63 F6.3 --- F606Wsharp Sharpness value for V-band (F606W)
65- 70 F6.3 mag F814Wmag Magnitude for I-band (F814W)
72- 76 F5.3 mag e_F814Wmag rms uncertainty on F814Wmag
78- 83 F6.3 mag F814Wsharp Sharpness value for I-band (F814W)
85- 91 F7.4 --- F814Wchi Goodness of fit factor chi from
PSF-fitting in I-band
92 I1 --- S1 [0/1] Star cluster candidate selection
criteria S1 (1)
94 I1 --- S2 [0/1] Star cluster candidate selection
criteria S2 (1)
96 I1 --- S3 [0/1] Star cluster candidate selection
criteria S3 (1)
98 I1 --- S4 [0/1] Star cluster candidate selection
criteria S4 (1)
100 I1 --- S5 [0/1] Star cluster candidate selection
criteria S5 (1)
102 I1 --- G1 [0/1] Globular cluster candidate selection
criteria G1 (1)
104 I1 --- G2 [0/1] Globular cluster candidate selection
criteria G2 (1)
106 I1 --- G3 [0/1] Globular cluster candidate selection
criteria G3 (1)
108 I1 --- G4 [0/1] Globular cluster candidate selection
criteria G4 (1)
110-112 A3 --- SCC [yes -] Star cluster candidate flag
(yes = all SCC criteria are satisfied)
114-116 A3 --- GCC [yes -] Globular cluster candidate flag
(yes = all GCC criteria are satisfied)
118-125 F8.4 [-] [Fe/H] Metallicity value derived from B-I color,
see Section 2.4 for more details
127-128 I2 --- HCG Hickson Compact group number
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Note (1): See Section 2.3.2 for full description. 1 means that a given
criterion is satisfied
Selection criteria are:
S1 = Magnitude cut at MV606←9mag
S2 = Photometric error σ<0.3mag in all three filters
S3 = Sharpness between -2 and 2 in all bands
S4 - χ<3 in the I814 band
S5 = Colour cuts
G1 = Hyperbolic filters in photometric error
G2 = Hyperbolic filters in daophot sharpness parameter
G3 = Magnitude cut at MV606←7.8mag
G4 = Milky Way Globular Cluster selection parallelogram
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Dec-2015