J/AJ/142/103 Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)
Surveying the agents of galaxy evolution in the tidally stripped, low
metallicity Small Magellanic Cloud (SAGE-SMC). II. Cool evolved stars.
Boyer M.L., Srinivasan S., van Loon J.T., McDonald I., Meixner M.,
Zaritsky D., Gordon K.D., Kemper F., Babler B., Block M., Bracker S.,
Engelbracht C.W., Hora J., Indebetouw R., Meade M., Misselt K.,
Robitaille T., Sewilo M., Shiao B., Whitney B.
<Astron. J., 142, 103 (2011)>
=2011AJ....142..103B 2011AJ....142..103B
ADC_Keywords: Surveys ; Magellanic Clouds ; Stars, giant ; Photometry, UBVRI ;
Photometry, infrared
Keywords: circumstellar matter - Magellanic Clouds - stars: AGB and post-AGB -
stars: carbon - stars: mass-loss; supergiants
Abstract:
We investigate the infrared (IR) properties of cool, evolved stars in
the Small Magellanic Cloud (SMC), including the red giant branch (RGB)
stars and the dust-producing red supergiant (RSG) and asymptotic giant
branch (AGB) stars using observations from the Spitzer Space Telescope
Legacy program entitled "Surveying the Agents of Galaxy Evolution in
the Tidally Stripped, Low Metallicity SMC", or SAGE-SMC. The survey
includes, for the first time, full spatial coverage of the SMC bar,
wing, and tail regions at IR wavelengths (3.6-160um). We identify
evolved stars using a combination of near-IR and mid-IR photometry and
point out a new feature in the mid-IR color-magnitude diagram that may
be due to particularly dusty O-rich AGB stars. We find that the RSG
and AGB stars each contribute ∼20% of the global SMC flux (extended
+ point-source) at 3.6um, which emphasizes the importance of both
stellar types to the integrated flux of distant metal-poor galaxies.
Description:
The photometry presented here is from the SAGE-SMC archive catalog,
available from the Spitzer Science Center. See Gordon et al.
(2011AJ....142..102G 2011AJ....142..102G) for a description of the observations, data
reduction, and point-source extraction.
Photometry from LMC also presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
smc.dat 191 144921 Evolved stars and FIR objects in the SMC,
from erratum in AJ 143, 127 (2012) (table4.dat)
lmc.dat 191 437991 SAGE Photometry for Evolved Stars in the LMC
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See also:
II/305 : SAGE LMC and SMC IRAC Source Catalog (IPAC 2009)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002)
J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007)
J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)
Byte-by-byte Description of file: smc.dat lmc.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- --- [SSTISAGEMA]
12- 30 A19 --- Name IRAC designation, JHHMMSS.ss+DDMMSS.s
32- 37 A6 --- Class Classification (1)
39- 47 F9.6 deg RAdeg Right ascension in decimal degrees (J2000)
49- 58 F10.6 deg DEdeg Declination in decimal degrees (J2000)
60- 64 F5.2 mag Umag ?=99.99 MCPS survey U band magnitude (2)
66- 70 F5.2 mag e_Umag ?=9.99 Uncertainty in Umag (2)
72- 76 F5.2 mag Bmag ?=99.99 MCPS survey B band magnitude (2)
78- 81 F4.2 mag e_Bmag ?=9.99 Uncertainty in Bmag (2)
83- 87 F5.2 mag Vmag ?=99.99 MCPS survey V band magnitude (2)
89- 92 F4.2 mag e_Vmag ?=9.99 Uncertainty in Vmag (2)
94- 98 F5.2 mag Imag ?=99.99 MCPS survey I band magnitude (2)
100-103 F4.2 mag e_Imag ?=9.99 Uncertainty in Imag (2)
105-109 F5.2 mag Jmag ?=99.99 2MASS J band magnitude (2)
111-114 F4.2 mag e_Jmag ?=9.99 Uncertainty in Jmag (2)
116-120 F5.2 mag Hmag ?=99.99 2MASS H band magnitude (2)
122-125 F4.2 mag e_Hmag ?=9.99 Uncertainty in Hmag (2)
127-131 F5.2 mag Kmag ?=99.99 2MASS Ks band magnitude (2)
133-136 F4.2 mag e_Kmag ?=9.99 Uncertainty in Kmag (2)
138-142 F5.2 mag [3.6] ?=99.99 Spitzer/IRAC 3.6um band magnitude (2)
144-147 F4.2 mag e_[3.6] ?=9.99 Uncertainty in [3.6] (2)
149-153 F5.2 mag [4.5] ?=99.99 Spitzer/IRAC 4.5um band magnitude (2)
155-158 F4.2 mag e_[4.5] ?=9.99 Uncertainty in [4.5] (2)
160-164 F5.2 mag [5.8] ?=99.99 Spitzer/IRAC 5.8um band magnitude (2)
166-169 F4.2 mag e_[5.8] ?=9.99 Uncertainty in [5.8] (2)
171-175 F5.2 mag [8.0] ?=99.99 Spitzer/IRAC 8.0um band magnitude (2)
177-180 F4.2 mag e_[8.0] ?=9.99 Uncertainty in [8.0] (2)
182-186 F5.2 mag [24] ?=99.99 Spitzer/MIPS 24um epoch-1 magnitude (2)
188-191 F4.2 mag e_[24] ?=9.99 Uncertainty in [24] (2)
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Note (1): Classification as follows:
RGB = Red Giant Branch star
RSG = Red supergiant star
O-AGB = Oxygen-rich Asymptotic Giant Branch star
C-AGB = Carbon-rich Asymptotic Giant Branch star
x-AGB = extreme AGB star
aO-AGB = anomalous oxygen-rich AGB star
FIR = far-infrared object
Note (2): UBVI from MCPS survey (Zaritsky et al., 2002, Cat. J/AJ/123/855)
and JHKs from 2MASS survey (Skrutskie et al. 2006, Cat. VII/233).
The IRAC magnitudes are from the co-addition of SAGE-SMC epoch 1 and
epoch 2, and S3MC (Bolatto et al., 2007, Cat. J/ApJ/655/212) IRAC images.
MIPS is only SAGE-SMC epoch 1.
Photometry is not corrected for reddening.
Magnitudes and errors of 9.99 and 99.99, respectively, indicate unknown
values.
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History:
* 25-Jan-2013: SMC data from electronic version of the journal
* 02-Dec-2016: LMC data from author (Martha Boyer, mboyer(at)stsci.edu)
* 05-Dec-2016: For LMC data, Class corrected (from author)
References:
Gordon et al., Paper I 2011AJ....142..102G 2011AJ....142..102G
Sewilo et al., Paper III 2013ApJ...778...15S 2013ApJ...778...15S Cat. J/ApJ/778/15
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-Nov-2012