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J/ApJ/680/495  Survey of Interstellar clouds in the Gould belt   (Harvey+, 2008)

The Spitzer survey of interstellar clouds in the Gould belt. I. IC 5146 observed with IRAC and MIPS. Harvey P.M., Huard T.L., Jorgensen J.K., Gutermuth R.A., Mamajek E.E., Bourke T.L., Merin B., Cieza L., Brooke T., Chapman N., Alcala J.M., Allen L.E., Evans Ii N.J., Di Francesco J., Kirk J.M. <Astrophys. J., 680, 495-516 (2008)> =2008ApJ...680..495H
ADC_Keywords: Photometry, infrared ; YSOs ; Cross identifications ; Associations, stellar Keywords: infrared: general - stars: formation Abstract: We present observations of two areas totalling 0.57deg2 in the IC 5146 star-forming region at 3.6, 4.5, 5.8, 8.0, 24, and 70um observed with the Spitzer Space Telescope. We reexamine the issue of the distance to this cloud and conclude a value of 950±80pc is most likely. We compare source counts, colors, and magnitudes in our observed region to a subset of the SWIRE data that was processed through our pipeline. We identify more than 200 young stellar object (YSO) candidates from color-magnitude and color-color diagrams, many of which were previously unknown. We compare the colors of these YSOs to the models of Robitaille et al. and perform simple fits to the SED's to estimate properties of the circumstellar disks likely to surround the Class II and III sources. We also compare the mid-IR disk excesses to Hα emission-line data where available. We present a quantitative description of the degree of clustering, estimate the star formation efficiency, and discuss the fraction of YSOs in the region with disks relative to an estimate of the diskless YSO population. Finally, we compare the YSO distribution to the cold dust distribution mapped by SCUBA and briefly describe the diffuse emission likely due to PAHs associated with the HII region. Description: Both areas (Core and Northwest, see Figure 1) were observed twice with Spitzer's IRAC (2006/11/26 and 2004/06/10) and MIPS cameras (2007/01/09 and 2007/01/06). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 123 132 YSO candidates in IC 5146 based on IRAC and MIPS table6.dat 123 43 YSO candidates in IC 5146 based on MIPS/2MASS table7.dat 123 27 YSO candidates in IC 5146 based on IRAC Only table9.dat 112 678 Spitzer matches to Herbig & Dahm (2002, Cat. J/AJ/123/304) optical sources table10.dat 31 86 Disk modeling results in Class II sources
See also: J/ApJ/315/104 : Molecular clouds near Gould belt (Taylor+, 1987) J/A+A/326/211 : T Tau Stars and the Gould Belt near Lupus (Wichmann+, 1997) J/ApJ/663/1149 : Spitzer survey of Serpens YSO population (Harvey+, 2007) J/ApJS/185/198 : The Cepheus flare observed with IRAC and MIPS (Kirk+, 2009) Byte-by-byte Description of file: table[567].dat
Bytes Format Units Label Explanations
1- 3 I3 --- YSO Running source number 5- 20 A16 --- SSTgbs Source name (HHMMSSss+DDMMSSs) (1) 22- 36 A15 --- Name Simbad name 38- 44 F7.2 mJy F3.6 ? IRAC 3.6um band flux density 46- 51 F6.2 mJy e_F3.6 ? Uncertainty in F3.6 53- 59 F7.2 mJy F4.5 ? IRAC 4.5um band flux density 61- 66 F6.2 mJy e_F4.5 ? Uncertainty in F4.5 68- 74 F7.2 mJy F5.8 ? IRAC 5.8um band flux density 76- 80 F5.2 mJy e_F5.8 ? Uncertainty in F5.8 82- 88 F7.2 mJy F8.0 ? IRAC 8.0um band flux density 90- 94 F5.2 mJy e_F8.0 ? Uncertainty in F8.0 96 A1 --- l_F24 Limit flag on F24 (for table 7 only) 97-103 F7.2 mJy F24 ? MIPS 24um band flux density (IRAC in table 5) 105-110 F6.2 mJy e_F24 ? Uncertainty in F24 (not for table 7) 112-116 I5 mJy F70 ? MIPS 70um band flux density (not for table 7) 118-121 I4 mJy e_F70 ? Uncertainty in F70 (not for table 7) 123 A1 --- f_F70 [a] a = Flux derived by crude deconvolution (for table 5 only)
Note (1): SSTgbs JHHMMSSss+DDMMSSs in Simbad.
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/710] Running optical identification number (1) 5- 7 F3.1 arcsec Off ? Optical/IR positional offset 9- 24 A16 --- SSTgbs Spitzer source match (HHMMSSss+DDMMSSs) (2) 26- 28 I3 --- YSO ? YSO number given in Tables 5-7 30 A1 --- l_F3.6 Limit flag on F3.6 31- 38 F8.3 mJy F3.6 ? IRAC 3.6um band flux density 40- 44 F5.3 mJy e_F3.6 ? Uncertainty in F3.6 46 A1 --- l_F4.5 Limit flag on F4.5 47- 54 F8.3 mJy F4.5 ? IRAC 4.5um band flux density 56- 60 F5.3 mJy e_F4.5 ? Uncertainty in F4.5 62 A1 --- l_F5.8 Limit flag on F5.8 63- 71 F9.3 mJy F5.8 ? IRAC 5.8um band flux density 73- 77 F5.3 mJy e_F5.8 ? Uncertainty in 5.8Flux 79 A1 --- l_F8.0 Limit flag on F8.0 80- 88 F9.3 mJy F8.0 ? IRAC 8.0um band flux density 90- 94 F5.3 mJy e_F8.0 ? Uncertainty in F8.0 96 A1 --- l_F24 Limit flag on F24 97-106 F10.2 mJy F24 ? MIPS 24um band flux density 108-112 F5.2 mJy e_F24 ? Uncertainty in F24
Note (1): In original table, Objects No. 10, 31, 50, 52, 65, 78, 138, 163, 263, 351, 375 and 636 were present, with no data. These have been taken off of the table. Note (2): SSTgbs JHHMMSSss+DDMMSSs in Simbad.
Byte-by-byte Description of file: table10.dat
Bytes Format Units Label Explanations
1- 3 I3 --- YSO Running star identification number 5- 8 F4.1 mag AV The V band extinction 10- 14 F5.2 [solLum] logL Log of the luminosity 16- 19 F4.2 --- disk/* The disk to star luminosity ratio 21- 23 F3.1 um lam-IR Wavelength at which the IR excess begins 25- 28 F4.1 --- IRexc Slope of the IR excess 30- 31 A2 --- SpT Spectral type
History: From electronic version of the journal References: Kirk et al. Paper II. 2009ApJS..185..198K. Cat. J/ApJS/185/198.
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Mar-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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