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J/ApJ/671/470   MIPS survey of YSOs in Vela Molecular Ridge-D  (Giannini+, 2007)

Spitzer MIPS survey of the young stellar content in the Vela Molecular Ridge-D. Giannini T., Lorenzetti D., De Luca M., Nisini B., Marengo M., Allen L., Smith H.A., Fazio G., Massi F., Elia D., Strafella F. <Astrophys. J., 671, 470-482 (2007)> =2007ApJ...671..470G
ADC_Keywords: Surveys ; Molecular clouds ; Infrared sources Mission_Name: Spitzer Keywords: infrared: stars - ISM: clouds - ISM: individual (Vela Molecular Ridge) - ISM: jets and outflows - stars: formation - surveys Abstract: A new, unbiased Spitzer MIPS imaging survey (∼1.8deg2) of the young stellar content of the Vela Molecular Ridge-D (VMR-D) is presented. The survey is complete down to 5 and 250mJy at 24 and 70µm, respectively. A total of 849 sources are detected at 24µm, and 52 of them also have a 70µm counterpart. The VMR-D region is one that we have already partially mapped in dust and gas millimeter emission, and we discuss the correlation between the Spitzer compact sources and the millimeter contours. About half of the 24µm sources are located inside the region delimited by the 12CO(1-0) contours, corresponding to only one-third of the full area mapped with MIPS. Therefore, the 24µm source density increases by about 100% moving from outside to inside the CO contours. For the 70µm sources, the corresponding density increase is a factor of 4. About 400 sources of these have a 2MASS counterpart, and we have used this to construct a Ks versus Ks-[24] diagram and to identify the protostellar population inside the cloud. Description: The VMR-D cloud was observed with MIPS on board the Spitzer Space Telescope within the Guaranteed Time Observation program (PID 30335). The observations covered ∼1.15° (in right ascension) x 1.6° (in declination) centered at RA,DE=8:47:50, -43:42:13 (J2000.0) and 8:48:20, -43:31:26 (J2000.0) at 24 and 70µm, respectively (orientation: 145° west of north). Data were collected on 2006 June 14. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 89 858 MIPS sources in the Vela Molecular Cloud-D table3.dat 121 67 MIPS sources detected at 70µm
See also: J/A+AS/104/233 : Emission-line stars in Vela Molecular Ridge (Pettersson+ 1994) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [SSTVMRD] 9- 26 A18 --- SSTVMRD Name (JHHMMSS.s+DDMMSS.s) 27 A1 --- n_SSTVMRD [*] Corrected name (G1) 28- 29 I2 h RAh Hour of Right Ascension (J2000) (1) 31- 32 I2 min RAm Minute of Right Ascension (J2000) (1) 34- 37 F4.1 s RAs Second of Right Ascension (J2000) (1) 39 A1 --- DE- Sign of the Declination (J2000) (1) 40- 41 I2 deg DEd Degree of Declination (J2000) (1) 43- 44 I2 arcmin DEm Arcminute of Declination (J2000) (1) 46- 49 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 51 A1 --- l_F24 Limit flag on F24 52- 57 F6.1 mJy F24 ? The 24 micron flux density 59- 62 F4.1 mJy e_F24 ? Uncertainty in F24 64- 71 F8.1 mJy F70 ? The 70 micron flux density 73- 77 F5.1 mJy e_F70 ? Uncertainty in Fl70 79 A1 --- CO [Y/N] Source inside/outside CO(1-0) contours? 81- 89 A9 --- Dust Associated dust core (G2)
Note (1): Of the 24 micron image.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 --- [GLD2007] [1/67] Sequential number 3- 4 A2 --- n_[GLD2007] Note on source (1) 6- 12 A7 --- --- [SSTVMRD] 14- 31 A18 --- SSTVMRD Name (JHHMMSS.s+DDMMSS.s) 33- 34 I2 h RAh Right ascension (J2000.0) 36- 37 I2 min RAm Right ascension (J2000.0) 39- 42 F4.1 s RAs Right ascension (J2000.0) 44 A1 --- DE- Declination sign (J2000.0) 45- 46 I2 deg DEd Declination (J2000.0) 48- 49 I2 arcmin DEm Declination (J2000.0) 51- 54 F4.1 arcsec DEs Declination (J2000.0) 55 A1 --- e [e] e when coordinates from 70µm (from 24µm otherwise) 57- 60 F4.1 arcsec e_RAs ?=- rms uncertainty on RA 62- 65 F4.1 arcsec e_DEs ?=- rms uncertainty on DE 67 A1 --- l_F24 Limit flag on F24 68- 73 F6.1 mJy F24 ?=- Flux density at 24µm 75- 78 F4.1 mJy e_F24 ? rms uncertainty on F24 79 A1 --- n_F24 [Df] D for diffuse, f for saturated 81- 86 I6 mJy F70 Flux density at 70µm 88- 90 I3 mJy e_F70 rms uncertainty on F70 92 A1 --- CO [Y/N] Source inside/outside CO(1-0) contours? 94-102 A9 --- Dust Associated dust core (G2) 104-107 F4.1 arcsec oRA ? Offset of dust core from source, along RA 109-112 F4.1 arcsec oDE ? Offset of dust core from source, along DE 114-117 F4.1 arcsec oRA2 ? Offset of second dust core from source, along RA 119-121 F3.1 arcsec oDE2 ? Offset of second dust core from source, along DE
Note (1): Notes as follows: c = Detected only at 70µm d = IRS 16 ([LLN92] IRS 16) in the Liseau et al. (1992A&A...265..577L) e = The 70µm coordinate f = Saturated g = Associated with the same 70µm source h = IRS 17 ([LLN92] IRS 17) in the Liseau et al. (1992A&A...265..577L) i = Source outside the 24µm map j = IRS 18 ([LLN92] IRS 18) in the Liseau et al. (1992A&A...265..577L) k = IRS 19 ([LLN92] IRS 19) in the Liseau et al. (1992A&A...265..577L) l = IRS 20 ([LLN92] IRS 20) in the Liseau et al. (1992A&A...265..577L) m = IRS 21 ([LLN92] IRS 21) in the Liseau et al. (1992A&A...265..577L)
Global notes: Note (G1): In original version, SSTVMRD J084853.2-433057.1 was named SSTVMRD J084853.4-433101.1. The name was corrected by CDS, in accordance with table3. Note (G2): Following the nomenclature by Massi et al. (2007A&A...466.1013M, [MDE2007] MMSNN and [MDE2007] ummsNN) and Elia et al. (2007ApJ...655..316E, [EMS2007] VMR-DNN) dust peaks are denoted by MMS (umms for underresolved peaks), while gas peaks are denoted by VMR.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 10-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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