Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/669/327     S3MC: YSOs in N66, in SMC                      (Simon+, 2007)

The Spitzer survey of the Small Magellanic Cloud: discovery of embedded protostars in the HII region NGC 346. Simon J.D., Bolatto A.D., Whitney B.A., Robitaille T.P., Shah R.Y., Makovoz D., Stanimirovic S., Barba R.H., Rubio M. <Astrophys. J., 669, 327-336 (2007)> =2007ApJ...669..327S
ADC_Keywords: Magellanic Clouds ; H II regions ; YSOs Keywords: H II regions - infrared: stars - ISM: individual (N66) - Magellanic Clouds - stars: formation - stars: pre-main sequence Abstract: We use Spitzer Space Telescope observations from the Spitzer Survey of the Small Magellanic Cloud (S3MC) to study the young stellar content of N66, the largest and brightest HII region in the SMC. In addition to large numbers of normal stars, we detect a significant population of bright, red infrared sources that we identify as likely to be young stellar objects (YSOs). We use spectral energy distribution (SED) fits to classify objects as ordinary (main-sequence or red giant) stars, asymptotic giant branch stars, background galaxies, and YSOs. Description: We performed photometry on the mosaic images with the Astronomical Point Source Extraction (APEX) tasks in the MOPEX package. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 94 111 Young Stellar Objects in N66
See also: J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- YSO [DP] (D)efinite or (P)robable YSOs 3- 5 I3 --- [SBW2007b] Sequential number 7- 13 A7 --- --- [SSTS3MC] 15- 29 A15 --- SSTS3MC SSTS3MC designation (DD.dddd+DD.dddd) 31- 32 I2 h RAh Right ascension (J2000) 34- 35 I2 min RAm Right ascension (J2000) 37- 41 F5.2 s RAs Right ascension (J2000) 43 A1 --- DE- Declination sign (J2000) 44- 45 I2 deg DEd Declination (J2000) 47- 48 I2 arcmin DEm Declination (J2000) 50- 53 F4.1 arcsec DEs Declination (J2000) 55- 59 I5 solLum Lum Stellar luminosity 61- 65 I5 solLum e_Lum ?=- rms uncertainty on Lum (1) 67- 70 F4.1 solMass Mass Stellar mass 72- 74 F3.1 solMass e_Mass ?=- rms uncertainty on Mass (1) 76- 78 A3 --- Stage Stage of YSO (I, II or III) 80- 82 F3.1 --- e_Stage ?=- rms uncertainty on Stage (1) 84- 88 F5.2 --- chi2 chi2 value (2) 90- 94 F5.2 --- chi22 ?=- chi_2_^2^ value (3)
Note (1): The uncertainties on the luminosities, masses, and stages are calculated as the weighted standard deviation of the luminosities, masses, and stages of all of the acceptable YSO models. In cases where there is only one acceptable model for a given source, or there are multiple models but they all produce the same luminosity/mass/stage, we cannot calculate an uncertainty in this way, so we fill the corresponding space with an ellipsis. Note (2): The χ2 value for the best-fitting SED. Note that these are raw χ2 values, not χ2 per data point, so a good fit (χ2 per data point ≤2.2) can have a χ2 value as high as 8.8 (if there are four flux data points for that source) or more. Note (3): The χ2 value for the best-fitting AGB star or background galaxy SED.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Jan-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

catalogue service

© UDS/CNRS

Contact