J/MNRAS/451/3504 Classification of IRS sources in the SMC (Ruffle+, 2015)
Spitzer Infrared Spectrograph point source classification in the
Small Magellanic Cloud.
Ruffle P.M.E., Kemper F., Jones O.C., Sloan G.C., Kraemer K.E., Woods P.M.,
Boyer M.L., Srinivasan S., Antoniou V., Lagadec E., Matsuura M.,
McDonald I., Oliveira J.M., Sargent B.A., Sewilo M., Szczerba R.,
van Loon J.T., Volk K., Zijlstra A.A.
<Mon. Not. R. Astron. Soc. 451, 3504 (2015)>
=2015MNRAS.451.3504R 2015MNRAS.451.3504R (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Infrared sources ; YSOs ; H II regions ;
Stars, carbon ; Stars, supergiant ; Planetary nebulae
Keywords: techniques: spectroscopic - surveys - dust, extinction ;
HII regions - Magellanic Clouds - infrared: stars
Abstract:
The Magellanic clouds are uniquely placed to study the stellar
contribution to dust emission. Individual stars can be resolved in
these systems even in the mid-infrared, and they are close enough to
allow detection of infrared excess caused by dust. We have searched
the Spitzer Space Telescope data archive for all Infrared Spectrograph
(IRS) staring-mode observations of the Small Magellanic Cloud (SMC)
and found that 209 Infrared Array Camera (IRAC) point sources within
the footprint of the Surveying the Agents of Galaxy Evolution in the
Small Magellanic Cloud (SAGE-SMC) Spitzer Legacy programme were
targeted, within a total of 311 staring mode observations. We classify
these point sources using a decision tree method of object
classification, based on infrared spectral features, continuum and
spectral energy distribution shape, bolometric luminosity, cluster
membership and variability information. We find 58 asymptotic giant
branch (AGB) stars, 51 young stellar objects (YSOs), 4 post-AGB
objects, 22 Red Supergiants (RSGs), 27 stars (of which 23 are dusty OB
stars), 24 planetary nebulae (PNe), 10 Wolf-Rayet (WR) stars, 3 HII
regions, 3 R Coronae Borealis (R CrB) stars, 1 Blue Supergiant and 6
other objects, including 2 foreground AGB stars. We use these
classifications to evaluate the success of photometric classification
methods reported in the literature.
Description:
This dataset includes two tables, one listing the positions of all
staring-mode pointings with the Infrared Spectrograph on the Spitzer
Space Telescope within the Small Magellanic Cloud, and the second
giving, for all point sources observed, a classification based on the
properties of the infrared spectrum and ancillary photometry.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 311 Spitzer IRS staring-mode targets
table2.dat 859 209 Classifications and photometry for the sample
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See also:
B/denis : The DENIS database (DENIS Consortium, 2005)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)
II/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)
II/281 : 2MASS 6X Point Source Working Database / Catalog (Cutri+ 2006)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
J/AJ/123/855 : Magellanic Clouds Photometric Survey: the SMC (Zaritsky+, 2002)
J/ApJ/669/327 : S3MC: YSOs in N66, in SMC (Simon+, 2007)
J/AcA/61/217 : VI light curves of SMC long-period variables (Soszynski+, 2011)
J/ApJ/778/15 : SAGE-SMC III. Young stellar objects (Sewilo+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SMC-IRS [1/311] SMC IRS identification number
7- 14 I8 --- AOR Spitzer astronomical obs. request key
16- 20 I5 --- PID Spitzer program identification number
22- 33 A12 --- PI Last name of the PI of the program
35- 36 I2 h RAh Right ascension from IRS (J2000)
38- 39 I2 min RAm Right ascension from IRS (J2000)
41- 45 F5.2 s RAs Right ascension from IRS (J2000)
47 A1 --- DE- Declination sign from IRS (J2000)
48- 49 I2 deg DEd Declination from IRS (J2000)
51- 52 I2 arcmin DEm Declination from IRS (J2000)
54- 57 F4.1 arcsec DEs Declination from IRS (J2000)
59- 89 A31 --- FileName Name of the spectral file in CASSIS (G1)
91-101 A11 --- Code Code for the link to the CASSIS database
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SMC-IRS [1/311] SMC IRS identification number
6- 35 A30 --- Name Name of targeted point source
37- 57 A21 --- Class SAGE-Spec classification (this paper) (1)
59- 68 F10.6 deg RAdeg Right ascension of IRS source (J2000)
70- 79 F10.6 deg DEdeg Declination of IRS source (J2000)
81- 88 I8 --- AOR Spitzer astronomical observation request key
90- 94 I5 --- PID Spitzer program identification number
96-107 A12 --- PI Last name of the PI of the program
109-124 A16 --- --- [cassistblspcf_]
125-138 A14 --- FileName name of the spectral file in CASSIS
140-169 A30 --- IRAC SAGE-SMC or S3MC counterpart name:
SSTISAGE[1M]A JHHMMSS.ss+DDMMSS.s or
S3MC JHHMMSS.ss+DDMMSS.s
171-179 F9.6 deg RAIdeg Right ascension of IRAC position (J2000)
181-190 F10.6 deg DEIdeg Declination of IRAC position (J2000)
193-198 F6.3 arcsec rI Distance from IRAC to IRS source
200-205 F6.3 mag IRAC1 ?=99.999 Magnitude in IRAC band 1 (3.6 um)
207-212 F6.3 mag IRAC2 ?=99.999 Magnitude in IRAC band 2 (4.5 um)
214-219 F6.3 mag IRAC3 ?=99.999 Magnitude in IRAC band 3 (5.8 um)
221-226 F6.3 mag IRAC4 ?=99.999 Magnitude in IRAC band 4 (8.0 um)
228-231 A4 --- --- [TYC-]
232-242 A11 --- Tycho Tycho counterpart (NNNN-NNNN-N)
245-250 F6.3 mag BTmag ?=99.999 BT magnitude in Tycho
253-258 F6.3 mag VTmag ?=99.999 VT magnitude in Tycho
260-264 A5 --- M2002 Massey (2002, Cat. II/236) counterpart,
<[M2002] LMC NNNNNN> in Simbad
271-276 F6.3 mag UM2mag ?=99.999 magnitude in U from Massey (3)
279-284 F6.3 mag BM2mag ?=99.999 magnitude in B from Massey (3)
287-292 F6.3 mag VM2mag ?=99.999 magnitude in V from Massey (3)
295-300 F6.3 mag RM2mag ?=99.999 magnitude in R from Massey (3)
302-307 F6.3 mag UMmag ?=99.999 magnitude in U from the MCPS (4)
309-314 F6.3 mag BMmag ?=99.999 magnitude in B from the MCPS (4)
316-321 F6.3 mag VMmag ?=99.999 magnitude in V from the MCPS (4)
323-328 F6.3 mag IMmag ?=99.999 magnitude in I from the MCPS (4)
330-345 A16 --- DENIS DENIS counterpart (JHHMMSS.s+DDMMSS, B/denis)
348-353 F6.3 mag IDmag ?=99.999 magnitude in I from DENIS
356-361 F6.3 mag JDmag ?=99.999 magnitude in J from DENIS
364-369 F6.3 mag KDmag ?=99.999 magnitude in K from DENIS
371-386 A16 --- IRSF IRSF counterpart (HHMMSSss+DDMMSSs, II/288)
388-393 F6.3 mag JImag ?=99.999 magnitude in J from the IRSF
395-400 F6.3 mag HImag ?=99.999 magnitude in H from the IRSF
402-407 F6.3 mag KImag ?=99.999 magnitude in K from the IRSF
409-424 A16 --- 2MASS6X 2MASS 6X counterpart (HHMMSSss+DDMMSSs, II/281)
427-432 F6.3 mag J2mag ?=99.999 magnitude in J from 2MASS 6X
435-440 F6.3 mag H2mag ?=99.999 magnitude in H from 2MASS 6X
443-448 F6.3 mag Ks2mag ?=99.999 magnitude in K_S from 2MASS 6X
450-468 A19 --- WISE WISE counterpart (JHHMMSS.ss+DDMMSS.s, II/311)
470-475 F6.3 mag WISE1 ?=99.999 magnitude in WISE band 1 (3.4 um)
477-482 F6.3 mag WISE2 ?=99.999 magnitude in WISE band 2 (4.6 um)
484-489 F6.3 mag WISE3 ?=99.999 magnitude in WISE band 3 (12 um)
491-496 F6.3 mag WISE4 ?=99.999 magnitude in WISE band 4 (22 um)
500-505 F6.3 mag N3mag ?=99.999 magnitude in AKARI band N3 (3.2 um)
509-514 F6.3 mag N4mag ?=99.999 magnitude in AKARI band N4 (4.1 um)
518-523 F6.3 mag S7mag ?=99.999 magnitude in AKARI band S7 (7 um)
528-533 F6.3 mag S11mag ?=99.999 magnitude in AKARI band S11 (11 um)
538-543 F6.3 mag L15mag ?=99.999 magnitude in AKARI band L15 (15 um)
548-553 F6.3 mag L24mag ?=99.999 magnitude in AKARI band L24 (24 um)
555-563 A9 --- --- [SSTM1SAGE]
564-584 A21 --- MIPS24 MIPS-24 counterpart (eHHMMSS.ss+DDMMSS.s, where
the epoch 'e' is 1 or 2, 0 for merged)
586-591 F6.3 mag [24] ?=99.999 magnitude in the MIPS 24-um band
593-604 A12 --- --- [SSTM2SAGECC_]
605-623 A19 --- MIPS70 MIPS-70 counterpart (JHHMMSS.ss+DDMMSS.s)
625-630 F6.3 mag [70] ?=99.999 magnitude in the MIPS 70-um band
632-643 A12 --- --- [SSTM3SAGECC_]
644-662 A19 --- MIPS160 MIPS-160 counterpart (JHHMMSS.ss+DDMMSS.s)
665-670 F6.3 mag [160] ?=99.999 magnitude in the MIPS 160-um band
674-680 F7.3 mag M1 [-8/-1] Absolute bolometric magnitude by
interpolation of JHKs, IRAC, MIPS24 photometry
684-690 F7.3 mag M2 [-8/-1]?=99.999 Absolute bolometric magnitude
as M1 but with WISE photometry added
694-700 F7.3 mag M1s [-8/-1] Absolute bolometric magnitude as M1 but
with IRS spectrum added
704-710 F7.3 mag M2s [-8/-1]?=99.999 Absolute bolometric magnitude
as M2 with IRS spectrum added
713-719 F7.3 mag Mmcd [-7.2/-3.4]?=99.999 Absolute bolometric
magnitude from code of McDonald et al. (2)
721-725 I5 Lsun Lmcd [1846/60004]?=0 Luminosity from Mmcd
730-734 I5 K Tmcd [2025/22125]?=0 Effective temperature
determined as Mmcd
738-747 A10 --- G09 Counterpart from Groenewegen et al. 2009
(J/A+A/506/1277)
750-754 I5 d P1 [183/1749]?=0 Pulsation period from
Groenewegen et al. 2009 (J/A+A/506/1277)
759-771 A13 --- --- [OGLE-SMC-LPV-]
772-776 I05 --- LPV [1141/17525]? OGLE III variable counterpart
(J/AcA/61/217)
781-786 F6.3 mag <Imag> ?=99.999 Mean I magnitude in OGLE III
793-798 F6.3 mag <Vmag> ?=99.999 Mean V magnitude in OGLE III
805-810 F6.3 mag Iamp [0.02/3.9]?=99.999 I-band amplitude in OGLE III
817-821 I5 d P2 [23/1859]?=0 pulsation period from OGLE III
830-832 A3 --- Cl1 Colour classification from Boyer et al. (5)
838-852 A15 --- Cl2 Colour classification from Matsuura et al. (6)
858-859 A2 --- Cl3 Colour classification from Sewilo et al. (7)
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Note (1): Our Classification types are:
YSO-1 = Embedded Young Stellar Objects
YSO-2 = Young Stellar Objects
YSO-3 = Evolved Young Stellar Objects
YSO-4 = HAeBe Young Stellar Objects
HII = HII regions
O-EAGB = Early-type O-rich AGB stars
O-AGB = Oxygen-rich AGB stars
RSG = Red Supergiants
O-PAGB = Oxygen-rich post-AGB stars
O-PN = Oxygen-rich planetary nebulae
C-AGB = Carbon-rich AGB stars
C-PAGB = Carbon-rich post-AGB stars
C-PN = Carbon-rich planetary nebulae
STAR = Stellar photospheres
STAR: dusty OB stars = Dusty OB stars
RcRB = R CrB stars
BSG = Blue Supergiant
WR = Wolf-Rayet stars
OTHER: B[e] star = B[e] stars
OTHER: FG O-EAGB = Foreground stars
OTHER: S Star = S stars
OTHER: symbiotic star = symbiotic star
Note (2): McDonald et al. (2009MNRAS.394..831M 2009MNRAS.394..831M, 2012MNRAS.427..343M 2012MNRAS.427..343M,
Cat. J/MNRAS/427/343).
Note (3): UBVR CCD survey of the Magellanic clouds, Massey et al. 2002,
Cat. II/236
Note (4): Magellanic Clouds Photometric Survey: the SMC, Zaritsky et al.
2002, J/AJ/123/855
Note (5): classes from Boyer et al. 2011, J/AJ/142/103):
RSG = Red SuperGiant
C = Carbon-rich AGB star
O = Oxygen-rich AGB star
X = extreme AGB star
FIR = far-infrared object
Note (6): classes from Matsuura et al. (2013MNRAS.429.2527M 2013MNRAS.429.2527M):
RSG = Red SuperGiant
C-AGB = Carbon-rich AGB star
O-AGB = Oxygen-rich AGB star
C-PAGB = Carbon-rich post-AGB star
O-PAGB = Oxygen-rich post-AGB star
YSO = Young Stellar Object
Note (7): Classes from Sewilo et al. 2013 (J/ApJ/778/15):
HR = High-Reliability YSO
P = Probable YSO
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Global notes:
Note (G1): CASSIS database, http://cassis.astro.cornell.edu/
(file name is cassistblspcf_$Code.tbl where "$Code" stands for
the contents of the "Code" column of table1)
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Acknowledgements:
Gregory C. Sloan, sloan(at)isc.astro.cornell.edu
(End) Gregory Sloan [Cornell Univ., USA], Patricia Vannier [CDS] 09-Jun-2015