J/ApJ/804/123 Star clusters in IC 10 (Lim+, 2015)
The star cluster system in the local group starburst galaxy IC 10.
Lim S., Lee M.G.
<Astrophys. J., 804, 123 (2015)>
=2015ApJ...804..123L 2015ApJ...804..123L
ADC_Keywords: Galaxies, nearby ; Photometry, UBVRI ; Clusters, globular
Keywords: galaxies: individual: IC 10; galaxies: star clusters: general;
galaxies: starburst; Local Group
Abstract:
We present a survey of star clusters in the halo of IC 10, a starburst
galaxy in the Local Group, based on Subaru R-band images and NOAO
Local Group Survey UBVRI images. We find five new star clusters. All
of these star clusters are located far from the center of IC 10, while
previously known star clusters are mostly located in the main body.
Interestingly, the distribution of these star clusters shows an
asymmetrical structure elongated along the east and southwest
directions. We derive UBVRI photometry of 66 star clusters, including
these new star clusters, as well as previously known star clusters.
Ages of the star clusters are estimated from a comparison of their
UBVRI spectral energy distribution with the simple stellar population
models. We find that the star clusters in the halo are all older than
1Gyr, while those in the main body have various ages, from very young
(several Myr) to old (>1Gyr). The young clusters (<10Myr) are mostly
located in the Hα emission regions and are concentrated on a
small region at 2" in the southeast direction from the galaxy center,
while the old clusters are distributed in a wider area than the disk.
Intermediate-age clusters (∼100 Myr) are found in two groups. One is
close to the location of the young clusters and the other is at ∼ 4"
from the location of the young clusters. The latter may be related to
past mergers or tidal interaction.
Description:
We use UBVRI images of IC 10 in the Local Group Survey (LGS; Massey et
al. 2007, J/AJ/133/2393) and R-band Suprime-cam images of IC 10 in the
Subaru archive (SMOKA).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 151 66 A catalog of the star clusters in IC 10
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See also:
J/ApJ/766/20 : HST photometry of star clusters in M82 (Lim+, 2013)
J/A+A/529/A25 : Phot. of star clusters in 5 nearby gal. (Silva-Villa+, 2011)
J/MNRAS/405/839 : Spectroscopic obs. of globular clusters (Sharina+, 2010)
J/PAZh/35/829 : Star clusters in IC 10 (Tikhonov+, 2009)
J/AJ/134/2474 : Hα emission-line stars in dwarfs gal. (Massey+, 2007)
J/AJ/133/2393 : UBVRI phot. in seven Local Group dwarfs gal. (Massey+, 2007)
J/MNRAS/362/1065 : XMM/Chandra study of IC 10 (Wang+, 2005)
J/A+A/424/125 : Carbon stars in IC10 (Demers+, 2004)
J/ApJS/147/29 : BRHalpha data of blue compact dwarf gal. (Gil De Paz+, 2003)
J/A+AS/139/393 : Young Massive Star Clusters. II. (Larsen, 1999)
http://smoka.nao.ac.jp/ : SMOKA science archive home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq [1/66] Star cluster running sequence number
7- 8 I2 h RAh [0] Hour of Right ascension (J2000)
10- 11 I2 min RAm [19/21] Minute of Right ascension (J2000)
13- 17 F5.2 s RAs Second of Right ascension (J2000)
19 A1 --- DE- [+] Sign of Declination (J2000)
20- 21 I2 deg DEd [59] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [12/22] Arcminute of Declination (J2000)
26- 29 F4.1 arcsec DEs Arcsecond of Declination (J2000)
31- 36 F6.3 mag Vmag [16.8/22] The V-band magnitude
38- 43 F6.3 mag e_Vmag [0.003/0.09] Uncertainty in Vmag
45- 50 F6.3 mag B-V [0.5/1.7] The (B-V) color index
52- 57 F6.3 mag e_B-V [0.006/0.21] Uncertainty in B-V
59- 64 F6.3 mag V-R [0.3/1.3] The (V-R) color index
66- 71 F6.3 mag e_V-R [0.004/0.12] Uncertainty in V-R
73- 78 F6.3 mag R-I [0.1/1.6]?=99.999 The (R-I) color index
80- 85 F6.3 mag e_R-I [0.004/0.13]?=99.999 Uncertainty in R-I
87- 92 F6.3 mag U-B [-0.6/1] The (U-B) color index
94- 99 F6.3 mag e_U-B [0.006/0.3] Uncertainty in U-B
101-105 F5.2 [yr] logA [6.7/10.3] log age with Z=0.008
107-111 F5.2 [yr] E_logA [0/1] Upper error in logA
113-117 F5.2 [yr] e_logA [0/0.6] Lower error in logA
119-123 F5.2 mag E(B-V) [0/0.6] The E(B-V) with Z=0.008
125-129 F5.2 mag E_E(B-V) [0/0.1] Upper error in E(B-V)
131-135 F5.2 mag e_E(B-V) [0/0.2] Lower error in E(B-V)
137-140 F4.2 [Msun] logM [2.5/5.8] log mass
142-146 F5.2 mag VMag [-10/-3.9]?=9.99 Absolute magnitude in V band
148-151 F4.2 pc Reff [1.1/9.1]?=9.99 Effective radius
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 26-Aug-2015