J/ApJ/663/1149 Spitzer survey of Serpens YSO population (Harvey+, 2007)
The Spitzer c2d survey of large, nearby, interstellar clouds.
IX. The Serpens YSO population as observed with IRAC and MIPS.
Harvey P., Merin B., Huard T.L., Rebull L.M., Chapman N., Evans II N.J.,
Myers P.C.
<Astrophys. J., 663, 1149-1173 (2007)>
=2007ApJ...663.1149H 2007ApJ...663.1149H
ADC_Keywords: Surveys ; Infrared sources
Mission_Name: Spitzer
Keywords: infrared: general
Abstract:
We discuss the combined IRAC/MIPS c2d Spitzer Legacy observations of
the Serpens star-forming region. We describe criteria for isolating
bona fide YSOs from the extensive background of extragalactic objects.
We then discuss the properties of the resulting high-confidence set of
235 YSOs. An additional 51 lower confidence YSOs outside this area are
identified from the MIPS data and 2MASS photometry. We present
color-color diagrams to compare our observed source properties with
those of theoretical models for star/disk/envelope systems and our own
modeling of the objects that are well represented by a stellar
photosphere plus circumstellar disk.
Description:
The parameters of our observations have already been described in
detail in Paper II (Harvey et al., 2006ApJ...644..307H 2006ApJ...644..307H) for IRAC and
in a companion study (Harvey et al., 2007ApJ...663.1139H 2007ApJ...663.1139H) for MIPS.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 132 235 YSOs in Serpens
table3.dat 132 51 YSO candidates in Serpens without
four-band IRAC observations
table4.dat 135 373 Matching Spitzer sources/fluxes for previously
identified IR sources in Serpens
table7.dat 35 130 Disk modeling results in class II sources
table8.dat 35 39 Disk modeling results in class III sources
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See also:
J/A+A/330/990 : VRIJHK photometry of Serpens cloud core (Giovannetti+ 1998)
J/BaltA/11/321 : Vilnius photometry in Serpens cauda (Straizys+, 2002)
J/BaltA/11/417 : Vilnius photometry in Serpens cauda (Straizys+, 2002)
J/A+A/421/623 : ISOCAM survey of YSOs in Serpens Cloud Core (Kaas+, 2004)
J/A+A/425/927 : Stellar objects in the Serpens cloud field (Klotz+, 2004)
J/A+A/458/789 : ISOCAM survey of Serpens/G3-G6 (Djupvik+, 2006)
J/A+A/463/275 : Chandra obs. of Serpens star-forming region (Giardino+, 2007)
J/ApJS/177/551 : Spitzer c2d survey XI. Lupus with IRAC and MIPS (Merin+, 2008)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [HMH2007] Running identification number
5 A1 --- n_[HMH2007] [b] Possible AGB (1)
7- 22 A16 --- SSTc2dJ Object name (HHMMSSss+DDMMSSs) (G1)
24- 39 A16 --- PName Previous name (G2)
41- 48 F8.3 mJy F3.6um ?=- IRAC 3.6 micron flux density
50- 56 F7.3 mJy e_F3.6um ? Uncertainty in F3.6um
58- 64 F7.2 mJy F4.5um ?=- IRAC 4.5 micron flux density
66- 71 F6.2 mJy e_F4.5um ? Uncertainty in F4.5um
73- 79 F7.2 mJy F5.8um ?=- IRAC 5.8 micron flux density
81- 86 F6.2 mJy e_F5.8um ? Uncertainty in F5.8um
88- 94 F7.2 mJy F8um ?=- IRAC 8.0 micron flux density
96-101 F6.2 mJy e_F8um ? Uncertainty in F8um
103-109 F7.2 mJy F24um ?=- MIPS 24.0 micron flux density
111-117 F7.2 mJy e_F24um ? Uncertainty in F24um
119-125 F7.1 mJy F70um ?=- MIPS 70.0 micron flux density
127-132 F6.1 mJy e_F70um ? Uncertainty in F70um
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Note (1): b = May be AGB star, based on Av derived from optical spectrum.
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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- 14 A14 --- Name Source identification (G2)
16- 31 A16 --- SSTc2dJ Spitzer name (HHMMSSss+DDMMSSs) (G1)
33 A1 --- l_F3.6um Limit flag on F3.6um
34- 41 F8.3 mJy F3.6um ? IRAC 3.6 micron flux density
43- 49 F7.3 mJy e_F3.6um ? Uncertainty in F3.6um
51 A1 --- l_F4.5um Limit flag on F3.6um
52- 59 F8.3 mJy F4.5um ? IRAC 4.5 micron flux density
61- 67 F7.3 mJy e_F4.5um ? Uncertainty in F4.5um
69 A1 --- l_F5.8um Limit flag on F3.6um
70- 77 F8.3 mJy F5.8um ? IRAC 5.8 micron flux density
79- 85 F7.3 mJy e_F5.8um ? Uncertainty in F5.8um
87 A1 --- l_F8um Limit flag on F3.6um
88- 95 F8.3 mJy F8um ? IRAC 8.0 micron flux density
97-103 F7.3 mJy e_F8um ? Uncertainty in F8um
105 A1 --- l_F24um Limit flag on F3.6um
106-112 F7.2 mJy F24um ? MIPS 24.0 micron flux density
114-120 F7.2 mJy e_F24um ? Uncertainty in F24um
122-128 F7.1 mJy F70um ? MIPS 70.0 micron flux density
130-135 F6.1 mJy e_F70um ? Uncertainty in F70um
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Byte-by-byte Description of file: table7.dat table8.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [HMH2007] Star identification number
5- 6 A2 --- SED Spectral Energy Distribution type (1)
8- 11 F4.1 mag AV Extinction in the V band
13- 18 F6.2 solLum LStar Stellar luminosity
20- 24 F5.3 --- LD/LS The disk to star luminosity ratio
26- 29 F4.1 um Turnoff Wavelength at which the infrared excess begins
31- 35 F5.1 --- Excess ?=-99.0 Slope of the infrared excess (2)
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Note (1): SED type defined as follows:
T = SED identical to a Classical T Tauri star, within the errors
L = SED with lower fluxes at some wavelengths than a Classical T Tau star
H = SED with larger fluxes at some wavelengths than a Classical T Tau star
LU = photospheric fluxes up to around 8 micron but then a sudden
jump at longer wavelengths to the levels of a T-Tauri disk.
Note (2): Starting at the last wavelength where the observed flux is
photospheric (λexcess).
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Global notes:
Note (G1): Stands for SSTc2d JHHMMSSss+DDMMSSs.
Note (G2): Source numbers from the catalogs:
EC = Eiroa & Casali (1992A&A...262..468E 1992A&A...262..468E), [EC92] NNN in Simbad
D = Djupvik et al. (2006A&A...458..789D 2006A&A...458..789D), [DAB2006] in Simbad
P = Preibisch (2003A&A...410..951P 2003A&A...410..951P), [P2003] JHHMMSS.s+DDMMSS
K = Kaas et al. (2004A&A...421..623K 2004A&A...421..623K), [KOB2004] NNNa in Simbad
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References:
Young et al., Paper I 2005ApJ...628..283Y 2005ApJ...628..283Y
Harvey et al., Paper II 2006ApJ...644..307H 2006ApJ...644..307H
Jorgensen et al., Paper III 2006ApJ...645.1246J 2006ApJ...645.1246J
Chapman et al., Paper IV 2007ApJ...667..288C 2007ApJ...667..288C
Porras et al., Paper V 2007ApJ...656..493P 2007ApJ...656..493P
Rebull et al., Paper VI 2007ApJS..171..447R 2007ApJS..171..447R
Padgett et al., Paper VII 2008ApJ...672.1013P 2008ApJ...672.1013P
Harvey et al., Paper VIII 2007ApJ...663.1139H 2007ApJ...663.1139H
Alcala et al., Paper X 2008ApJ...676..427A 2008ApJ...676..427A, Cat. J/ApJ/676/427
Merin et al., Paper XI 2008ApJS..177..551M 2008ApJS..177..551M, Cat. J/ApJS/177/551
Young et al., Paper XII 2015AJ....150...40Y 2015AJ....150...40Y, Cat. J/AJ/150/40
History:
* 29-Sep-2009: Original files
* 22-Jan-2010: one correction in table3
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 15-Aug-2009