J/ApJS/194/14 A Pan-Carina YSO catalog (Povich+, 2011)
A Pan-Carina young stellar object catalog: intermediate-mass young stellar
objects in the Carina nebula identified via mid-infrared excess emission.
Povich M.S., Smith N., Majewski S.R., Getman K.V., Townsley L.K.,
Babler B.L., Broos P.S., Indebetouw R., Meade M.R., Robitaille T.P.,
Stassun K.G., Whitney B.A., Yonekura Y., Fukui Y.
<Astrophys. J. Suppl. Ser., 194, 14 (2011)>
=2011ApJS..194...14P 2011ApJS..194...14P
ADC_Keywords: YSOs ; X-ray sources ; Photometry, infrared ; Stars, masses ;
Surveys
Keywords: circumstellar matter - ISM: individual objects (NGC 3372) -
stars: formation - stars: luminosity function, mass function -
stars: pre-main sequence - X-rays: stars
Abstract:
We present a catalog of 1439 young stellar objects (YSOs) spanning the
1.42deg2 field surveyed by the Chandra Carina Complex Project
(CCCP), which includes the major ionizing clusters and the most active
sites of ongoing star formation within the Great Nebula in Carina.
Candidate YSOs were identified via infrared (IR) excess emission from
dusty circumstellar disks and envelopes, using data from the Spitzer
Space Telescope (the Vela-Carina survey) and the Two-Micron All Sky
Survey. We model the 1-24um IR spectral energy distributions of the
YSOs to constrain physical properties. Our Pan-Carina YSO Catalog
(PCYC) is dominated by intermediate-mass (2M☉<m≲10M☉)
objects with disks, including Herbig Ae/Be stars and their less
evolved progenitors. The PCYC provides a valuable complementary data
set to the CCCP X-ray source catalogs, identifying 1029 YSOs in Carina
with no X-ray detection. We also catalog 410 YSOs with X-ray
counterparts, including 62 candidate protostars. Extrapolating over
the stellar initial mass function scaled to the PCYC population, we
predict a total population of >2x104 YSOs and a present-day star
formation rate (SFR) of >0.008M☉/yr. The global SFR in the
Carina Nebula, averaged over the past ∼5Myr, has been approximately
constant.
Description:
The CCCP catalog (Broos et al., 2011, Cat. J/ApJS/194/2) contains over
14000 point sources detected by the Advanced CCD Imaging Spectrometer
(ACIS) of the Chandra X-ray Observatory. Broos et al. matched the
Vela-Carina Archive to the CCCP X-ray catalog and found 6543
counterparts to CCCP sources. The Vela-Carina Catalog is a subset of
the Archive and provides mid-IR counterparts for 4664 CCCP sources.
The Carina Nebula was observed with Spitzer/MIPS during 2007 July as
part of program GO-30848 (MIPSCAR; PI: N. Smith). The Vela-Carina
survey (Spitzer Proposal ID 40791, PI: S. R. Majewski) was modeled
after the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire
(GLIMPSE; Benjamin et al. 2003PASP..115..953B 2003PASP..115..953B).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 114 1439 Pan-Carina YSO catalog: basic IR observational data
table3.dat 70 1439 Pan-Carina YSO catalog: modeled properties and
CCCP matches
table4.dat 77 61 Candidate X-ray-emitting stage 0/I YSOs
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
J/ApJS/194/2 : Chandra Carina Complex Project (CCCP) catalog (Broos+, 2011)
J/ApJS/194/9 : X-ray star clusters in the Carina complex (Feigelson+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- PCYC Pan-Carina YSO Catalog number
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination (J2000)
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30 A1 --- n_PCYC [AC] Origin (Archive or Catalog) (1)
32- 48 A17 --- SSTGLMA Source SSTGLM identifier (GLLL.llll+BB.bbbb)
50- 54 F5.1 mag Jmag ?=-99.9 2MASS J band magnitude (2)
56- 60 F5.1 mag Hmag ?=-99.9 2MASS H band magnitude (2)
62- 66 F5.1 mag Ksmag ?=-99.9 2MASS KS band magnitude (2)
68- 72 F5.1 mag [3.6] ?=-99.9 Spitzer/IRAC 3.6um band magnitude (2)
74- 78 F5.1 mag [4.5] ?=-99.9 Spitzer/IRAC 4.5um band magnitude (2)
80- 84 F5.1 mag [5.8] ?=-99.9 Spitzer/IRAC 5.8um band magnitude (2)
86- 90 F5.1 mag [8.0] ?=-99.9 Spitzer/IRAC 8.0um band magnitude (2)
92- 96 F5.1 mag [24] ?=-99.9 Spitzer/MIPS 24um band magnitude (2)
98 I1 --- q_Jmag [0,3] Quality flag for Jmag (3)
100 I1 --- q_Hmag [0,3] Quality flag for Hmag (3)
102 I1 --- q_Ksmag [0,3] Quality flag for Ksmag (3)
104 I1 --- q_[3.6] [0,3] Quality flag for 3.6mag (3)
106 I1 --- q_[4.5] [0,3] Quality flag for 4.5mag (3)
108 I1 --- q_[5.8] [0,3] Quality flag for 5.8mag (3)
110 I1 --- q_[8.0] [0,3] Quality flag for 8.0mag (3)
112 I1 --- q_[24] [0,3] Quality flag for 24mag (3)
114 A1 --- MSX? [X] Detected by Midcourse Space Experiment?
(Cat. V/114)
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Note (1): Flag as follows:
C = highly-reliable Vela-Carina Catalog
A = more-complete Archive.
Note (2): The typical photometric uncertainty is 0.1 mag.
Note (3): Quality flag as follows:
0 = non-detection;
1 = detection;
2 = flux density lower limit (magnitude upper limit);
3 = flux density upper limit (magnitude lower limit).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- PCYC Pan-Carina YSO Catalog number
6- 9 F4.1 [Lsun] Lbol Mean log bolometric luminosity
11- 13 F3.1 [Lsun] e_Lbol The 1σ uncertainty in logLbol
15- 18 F4.1 Msun Mass Mean stellar mass
20- 22 F3.1 Msun e_Mass The 1σ uncertainty in Mass
24- 28 F5.1 [Msun/yr] Menv ?=-99.9 Mean envelope mass loss rate
30- 34 F5.1 [Msun/yr] e_Menv ?=-99.9 The 1σ uncertainty in logMenv
36- 38 A3 --- Stage Evolutionary stage (4)
40- 57 A18 --- CXOGNC Match with CCCP source (Cat. J/ApJS/194/2;
HHMMSS.ss+DDMMSS.s)
59- 61 A3 --- Cl Cluster/Group membership (5)
63 A1 --- Reg [A-D] Region/Cluster/Group membership (5)
65- 70 A6 --- Notes Additional note(s) (6)
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Note (4): Evolutionary stage as follows:
0/I = YSOs are still embedded in their infalling, natal envelopes
II = YSOs have optically thick circumstellar disks
III = YSOs have optically thin disks
A = "Ambiguous"
See section 3 for further details.
Note (5): The Membership columns follow Feigelson et al. 2011,
Cat. J/ApJS/194/9 (G1-31 are X-ray groups of table 2, C1-20 are X-ray
clusters of table 1 and A-D are large-scale X-ray regions of table 1).
Note (6): O, P, Q, R, or Cr 232 refer to membership in the groups discussed
in Section 6.2; 2X or 3X indicates that the Spitzer source was matched
to 2 or 3 CCCP X-ray sources; and MSX means that the YSO is also an
Midcourse Space Experiment source (Egan et al., 2003, Cat. V/114).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- C [HS] Hard (Emed>2keV) or Soft
(Emed≤2keV) X-ray counterpart
3- 6 I4 --- PCYC Pan-Carina YSO Catalog number
8 A1 --- f_PCYC [c] Flag on PCYC 1025 (1)
10- 13 F4.1 Msun Mass Model mean stellar mass
15- 17 F3.1 Msun e_Mass The 1σ uncertainty in Mass
19- 21 F3.1 [K] logT Model mean stellar temperature
23- 25 F3.1 [K] e_logT The 1σ uncertainty in logT
27- 30 F4.1 [yr-1] logMenv/M ? Model mean envelope mass loss rate
divided by Mass
32- 36 E5.2 mag Av Model mean extinction
38- 42 E5.2 mag e_Av ? The 1σ uncertainty in Av (2)
44- 61 A18 --- CXOGNC Match with CCCP source (3)
63- 67 F5.1 ct NCts Observed net counts at 0.5-8keV (3)
69- 71 F3.1 keV Emed Observed median energy at 0.5-8keV (3)
73- 77 F5.1 [mW/m2] logFx Observed flux at total-band 0.5-8keV (3)
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Note (1):
c = PCYC 1025 is located in the very crowded center of the Treasure Chest,
hence it is very likely a combination of multiple confused sources in the
IRAC beam, and the physical association of the CCCP source with the IRAC
source is highly questionable.
Note (2): The probability distributions of AV,t can be strongly skewed,
with long tails to high values. This often yields very large values
for σ(AV,t), hence in cases where σ(AV,t)≫<AV,t> we
define Max(AV,t)=σ(AV,t).
Note (3): From Table 1 of Broos et al. 2001, Cat. J/ApJS/194/2,
in Simbad
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History:
From electronic version of the journal
References:
Townsley et al. CCCP introduction 2011ApJS..194....1T 2011ApJS..194....1T
Broos et al. CCCP catalog Cat. J/ApJS/194/2
Getman et al. Contamination in X-ray studies 2011ApJS..194....3G 2011ApJS..194....3G
Broos et al. Source classifier Cat. J/ApJS/194/4
Gagne et al. O and B stars Cat. J/ApJS/194/5
Povich et al. Cand. X-ray emitting OB stars Cat. J/ApJS/194/6
Naze et al. O and B stars X-ray properties Cat. J/ApJS/194/7
Parkin et al. QZ Car (HD 93206) 2011ApJS..194....8P 2011ApJS..194....8P
Feigelson et al. X-ray star clusters Cat. J/ApJS/194/9
Preibisch et al. NIR properties of YSO Cat. J/ApJS/194/10
Wang et al. Trumpler 15 Cat. J/ApJS/194/11
Wolk et al. Trumpler 16 Cat. J/ApJS/194/12
Povich et al. Pan-Carina YSO catalog Cat. J/ApJS/194/14
Evans et al. Companions of B stars in Tr 16 2011ApJS..194...13E 2011ApJS..194...13E
Townsley et al. Diffuse X-ray emission Cat. J/ApJS/194/15
Townsley et al. Comparison of diffuse emission 2011ApJS..194...16T 2011ApJS..194...16T
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-May-2011