RCW38YSO - RCW 38 Young Stellar Objects Catalog
This table contains the list of 624 young stellar objects (given in Tables 3 and 4 of the reference paper) found among the Spitzer sources in the field of RCW 38 using the two selection techniques described in Section 3 of the reference paper: (1) selection of stars with IR excesses in IR color-color diagrams, and (2) identification of X-ray luminous YSOs by comparing X-ray sources with IR detections. The latter technique was used to identify Type III YSOs lacking emission from a dusty disk. This table does NOT contain (i) the 177 candidate YSOs listed in Table 5 of the reference paper which were identified using the [3.6] versus [3.6] - [5.8] color-magnitude diagram, since contamination removal methods could not be utilized for these objects, (ii) the 24 candidate variable YSOs listed in Table 6 of the reference paper, nor (iii) 21 of the 29 candidate O-star cluster members which were listed in table 7 of the reference paper.
The Structure of the Star-forming Cluster RCW 38 Winston E., Wolk S.J., Bourke T.L., Megeath S.T., Gutermuth R., Spitzbart B. <Astrophys. J., 743, 166 (2011)> =2011ApJ...743..166W
A unique sequential identification number for each Spitzer source.
The name for the young stellar object. This was created by the HEASARC using the '[WWB2011]' prefix (for Winston, Wolk, Bourke 2011) and the source number value, in the style recommended by the Dictionary of Nomenclature of Celestial Objects, e.g., '[WWB2011] 72'.
The Right Ascension of the young stellar object in the selected equinox. This was given in J2000.0 equatorial coordinates to a precision of 0.01 seconds of time in the original reference.
The Declination of the young stellar object in the selected equinox. This was given in J2000.0 equatorial coordinates to a precision of 0.01 arcseconds in the original reference.
The Galactic Longitude of the young stellar object.
The Galactic Latitude of the young stellar object.
The Spitzer IRAC observation epoch identifier, as described in Table 1 of the reference paper, reproduced below:
Epoch ID Date Int. Time R.A.(J2000) Dec.(J2000) Coverage (s) (arcmin) 1 2006.06.05 05:53:33 12 8:58:59.7 -47:26:37.6 ~30 x 30 2 2006.06.05 06:58:53 2 8:59:25.9 -47:32:34.8 ~15 x 15 3 2007.02.21 19:42:03 12 8:59:05.7 -47:30:43.6 ~30 x 30 4 2007.02.21 20:45:35 2 8:59:05.9 -47:30:38.7 ~15 x 15
The YSO classification using the standard scheme:
YSO Type Meaning 0/I Class 0/I YSO (protostar) FS Flat spectrum YSO II Class II YSO (classic T Tauri star with dusty disk) III Class III YSO (weak-lined T Tauri star lacking dusty disk)
This parameter flags various source properties, as follows:
Flag Meaning X X-Ray source v Variable source o O star candidate
The 2MASS J-band magnitude of the young stellar object.
The uncertainty in the 2MASS J-band magnitude of the YSO.
The 2MASS H-band magnitude of the young stellar object.
The uncertainty in the 2MASS H-band magnitude of the YSO.
The 2MASS Ks-band magnitude of the young stellar object.
The uncertainty in the 2MASS Ks-band magnitude of the YSO.
The Spitzer/IRAC 3.6-micron band magnitude of the YSO.
The uncertainty in the Spitzer/IRAC 3.6-micron band magnitude of the YSO.
The Spitzer/IRAC 4.5-micron Band Magnitude of the YSO.
The uncertainty in the Spitzer/IRAC 4.5-micron band magnitude of the YSO.
The Spitzer/IRAC 5.8-micron Band Magnitude of the YSO.
The uncertainty in the Spitzer/IRAC 5.8-micron band magnitude of the YSO.
The Spitzer/IRAC 8.0-micron Band Magnitude of the YSO.
The uncertainty in the Spitzer/IRAC 8.0-micron band magnitude of the YSO.
The spectral index of the IRAC data for the YSO, alphaIRAC = d[log(lambda*Flambda)]/d[log(lambda)]. The conversion from magnitudes to fluxes in W cm-2 s-1 used the following zero fluxes for the J, H, Ks, [3.6], [4.5], [5.8], and [8.0] bands, respectively: 3.13 x 10-13, 1.13 x 10-13, 4.28 x 10-14, 6.57 x 10-15, 2.65 x 10-15, 1.03 x 10-15, 3.02 x 10-16. The slope was calculated by a least-squares fit over the available IRAC bands.
The Ks band extinction of the YSO, in magnitudes.
The HEASARC Browse object classification of the YSO, based on the value of the yso_type parameter.