Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/363/1111    Tycho-2 stars with IR excess             (Clarke+, 2005)

Tycho-2 stars with infrared excess in the MSX Point Source Catalogue. Clarke A.J., Oudmaijer R.D., Lumsden S.L. <Mon. Not. R. Astron. Soc., 363, 1111-1124 (2005)> =2005MNRAS.363.1111C
ADC_Keywords: Stars, pre-main sequence ; Infrared sources ; Photometry Keywords: circumstellar matter - stars: early-type - stars: evolution - stars: pre-main-sequence Abstract: Stars of all evolutionary phases have been found to have excess infrared emission due to the presence of circumstellar material. To identify such stars, we have positionally correlated the infrared Mid-Course Space Experiment (MSX) Point Source Catalogue (V/114) and the Tycho-2 optical catalogue (I/259). Near-mid-infrared colour criteria have been developed to select infrared excess stars. The search yielded 1938 excess stars; over half (979) have never previously been detected by IRAS. The excess stars were found to be young objects such as Herbig Ae/Be and Be stars, and evolved objects such as OH/IR (infrared) and carbon stars. A number of B-type excess stars were also discovered whose infrared colours could not be readily explained by known catalogued objects. Description: These tables contain optical,near-IR and mid-IR data for the complete list of infrared excess stars identified within the galactic plane. The tables containing the infrared excess stars identified in the IRAS gaps, Large and Small Magellanic Cloud and Star Forming regions are also provided. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file gp.dat 145 1938 Galactic Plane Sample irasgap.dat 145 95 IRAS Gap Sample lmc.dat 145 24 Large Magellanic Cloud Sample smc.dat 145 4 Small Magellanic Cloud Sample sfr.dat 145 51 Star Forming Regions Sample
See also: I/259 : The Tycho-2 Catalogue (Hog+ 2000) IV/25 : HD identifications for Tycho-2 stars (Fabricius+, 2002) III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003) V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003) Byte-by-byte Description of file: gp.dat irasgap.dat lmc.dat smc.dat sfr.dat
Bytes Format Units Label Explanations
1- 4 I4 --- TYC1 Tyc1 from Tycho-2 (<I/259>) Catalogue (1) 6- 10 I5 --- TYC2 Tyc2 from Tycho-2 (<I/259>) Catalogue (1) 12 I1 --- TYC3 Tyc3 from Tycho-2 (<I/259>) Catalogue (1) 14- 15 I2 h RAh Right Ascension (J2000) 17- 18 I2 min RAm Right Ascension (J2000) 20- 23 F4.1 s RAs Right Ascension (J2000) 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 30 I2 arcmin DEm Declination (J2000) 32- 33 I2 arcsec DEs Declination (J2000) 35- 39 A5 --- Region Region, only for sfr.dat objects (2) 41- 46 I6 --- HD ? Henry Draper (III/135) number 48- 64 A17 --- SpType Spectral Type from Tycho-2 Spectral Type Catalogue (III/231) 66- 70 F5.2 mag BTmag Optical B band magnitude 72- 76 F5.2 mag VTmag Optical V band magnitude 78- 82 F5.2 mag Jmag Near-IR J band magnitude (3) 84- 88 F5.2 mag Hmag Near-IR H band magnitude (3) 90- 94 F5.2 mag Kmag Near-IR K band magnitude (3) 96 I1 --- n2M Number of extra 2MASS source within 6" (4) 98-103 F6.2 Jy Aband ? MSX (<V/114>) band A (8 micron) flux (5) 105-111 F7.2 Jy Cband ? MSX (<V/114>) band C (12 micron) flux (5) 113-119 F7.2 Jy Dband ? MSX (<V/114>) band D (14 micron) flux (5) 121-127 F7.2 Jy Eband ? MSX (<V/114>) band E (21 micron) flux (5) 129 I1 --- q_Aband MSX flux quality for band A (6) 131 I1 --- q_Cband MSX flux quality for band C (6) 133 I1 --- q_Dband MSX flux quality for band D (6) 135 I1 --- q_Eband MSX flux quality for band E (6) 137 A1 --- IRAS [I] IRAS proximity flag (7) 139-142 F4.2 mag E(IR) Infrared colour excess (J-[8], K-[21] or K-[8]) 144-145 A2 --- n_E(IR) [J 21 K] Infrared Excess Type (8)
Note (1): The Tycho-2 catalogue identifier consists of a GSC region number (TYC1), the running number within the region (TYC2) and a component identifier (TYC3) which is normally 1.The recommended star designation contains a hyphen between the TYC numbers, e.g. TYC 1-13-1. Note (2): Star Forming Region in which the infrared excess star was identified as follows: PLEIA = Pleiades ORION = Orion G159 = G159.6-18.5 G300 = G300.2-16.8 S263 = Sh 2-263 Note (3): 2MASS J,H,K magnitudes from 2MASS PSC. All flux qualities better than E. Note (4): Number of extra 2MASS sources within 6 arcsec of Tycho-2 star Note (5): MSX A,C,D and E band fluxes from MSX PSC (v2.3) with flux quality >1. 0 = Flux Quality ≤1 i.e non-detection or upper limit Note (6): MSX A,C,D and E flux qualities (upper limit=1 to excellent=4) Note (7): I indicates an IRAS source within 45 arcsec; a blank means no IRAS source within 45 arcsec Note (8): Infrared Excess Type as follows: J = Excess colour is J-[8] 21 = Excess colour is K-[21] K = Excess colour is K-[8]
Acknowledgements: Andrew Clarke, ajc(at)ast.leeds.ac.uk
(End) Patricia Vannier [CDS] 16-Feb-2006
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