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J/A+A/530/A2              New hot subdwarf stars                 (Oreiro+, 2011)

A search for new hot subdwarf stars by means of Virtual Observatory tools. Oreiro R., Rodriguez-Lopez C., Solano E., Ulla A., Ostensen R., Garcia-Torres M. <Astron. Astrophys., 530, A2 (2011)> =2011A&A...530A...2O
ADC_Keywords: Stars, early-type ; Stars, subdwarf ; Photometry Keywords: stars: early-type - subdwarfs - astronomical databases: miscellaneous - Virtual Observatory tools Abstract: Recent massive sky surveys in different bandwidths are providing new opportunities to modern astronomy. The Virtual Observatory (VO) provides the adequate framework to handle the huge amount of information available and filter out data according to specific requirements. Hot subdwarf stars are faint, blue objects, and are the main contributors to the far-UV excess observed in elliptical galaxies. They offer an excellent laboratory to study close and wide binary systems, and to scrutinize their interiors through asteroseismology, since some of them undergo stellar oscillations. However, their origins are still uncertain, and increasing the number of detections is crucial to undertake statistical studies. In this work, we aim at defining a strategy to find new, uncatalogued hot subdwarfs. Description: Making use of VO tools we thoroughly search stellar catalogues to retrieve multi-colour photometry and astrometric information of a known sample of blue objects, including hot subdwarfs, white dwarfs, cataclysmic variables and main-sequence OB stars. We define a procedure to distinguish among these spectral classes, which is particularly designed to obtain a hot subdwarf sample with a low contamination factor. To check the validity of the method, this procedure is then applied to two test sky regions: to the Kepler FoV and to a test region of 300deg2 around (RA:225°, DE:5°). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 114 15 List of candidates in the Kepler field-of-view table7.dat 60 73 List of the 73 candidates in and around the Kepler field-of-view that fulfil the photometric and proper motion criteria
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) III/137 : Spectroscopically identified hot subdwarfs (Kilkenny+ 1988) J/A+A/317/689 : Hot subdwarfs proper motions (Thejll+ 1997) J/A+A/430/223 : Parameters of cool companions of sdB stars (Lisker+, 2005) J/AJ/126/1455 : 2MASS photometry of hot subdwarf stars (Stark+, 2003) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right ascension (J2000) 4- 5 I2 min RAm Right ascension (J2000) 7- 8 I2 s RAs Right ascension (J2000) 10 A1 --- DE- Declination sing (J2000) 11- 12 I2 deg DEd Declination (J2000) 14- 15 I2 arcmin DEm Declination (J2000) 17- 18 I2 arcsec DEs Declination (J2000) 20- 25 F6.3 mag FUVmag GALEX FUV magnitude 27- 32 F6.3 mag NUVmag GALEX NUV magnitude 34- 39 F6.3 mag g'mag KIC g' magnitude 41- 46 F6.3 mag r'mag KIC r' magnitude 48- 53 F6.3 mag i'mag KIC i' magnitude 55- 60 F6.3 mag z'mag KIC z' magnitude 62- 66 F5.2 mag Jmag 2MASS J magnitude 68 A1 --- l_Hmag Limit flag on Hmag 69- 73 F5.2 mag Hmag 2MASS H magnitude 75 A1 --- l_Kmag Limit flag on Kmag 76- 80 F5.2 mag Kmag 2MASS Ks magnitude 82- 86 I5 K Teff Effective temperature form best SED fit performed by VOSA 87 A1 --- f_Teff [*] * indicates that a poor SED fit is obtained 89- 95 A7 --- SpType Spectral classification 97-104 I8 --- KIC KIC number (Cat. V/133) 106-112 A7 --- Com Comments about binarity, variability, ... (1) 114 A1 --- r_SpType [ab] Reference for SpType (2)
Note (1): Notes as follows: Qx = Kepler survey cycle of observation N = no particular features in the light curve R = reflecting binary G = g-mode pulsator I = irregular variable C = variability from the companion Note (2): Spectral classification reference as follows: a = from Ostensen et al. (2010MNRAS.409.1470O) b = from Ostensen et al. (2011, accepted)
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right ascension (J2000) 4- 5 I2 min RAm Right ascension (J2000) 7- 8 I2 s RAs Right ascension (J2000) 10 A1 --- DE- Declination sing (J2000) 11- 12 I2 deg DEd Declination (J2000) 14- 15 I2 arcmin DEm Declination (J2000) 17- 18 I2 arcsec DEs Declination (J2000) 20- 25 F6.3 mag FUVmag GALEX FUV magnitude 27- 32 F6.3 mag NUVmag GALEX NUV magnitude 34- 38 F5.2 mag Jmag 2MASS J magnitude 40- 44 F5.2 mag Hmag 2MASS H magnitude 46- 50 F5.2 mag Kmag KMASS Ks magnitude 52- 59 I8 --- KIC ? KIC number (Cat. V/133) 60 A1 --- n_KIC [*] * for objects meeting all the selection criteria, detailed in Table 3
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Aug-2011
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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