Access to Astronomical Catalogues

← Click to display the menu
J/A+A/326/1044      Eclipsing binaries uvbyHbeta photometry (Jordi+ 1997)

Photometric versus empirical surface gravities of eclipsing binaries Jordi C., Ribas I., Torra J., Gimenez A. <Astron. Astrophys. 326, 1044 (1997)> =1997A&A...326.1044J (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby, beta Keywords: Stars: fundamental parameters - Stars: binaries: eclipsing - Stars: early-type - Stars: late-type Abstract: Systematic differences in photometric stellar surface gravity determination are studied by means of the comparison with empirical values derived from detached double-lined eclipsing binaries. Photometric gravities were computed using Moon & Dworetsky (1985MNRAS.217..305M) grids based on Kurucz (1979ApJS...40....1K) atmosphere models, and empiric al gravities were taken from Andersen (1991A&ARv...3...91A). Individual Stroemgren colours and β indices of each component of the binary system have to be taken into account to correctly analyze the observed differences. A compilation of data on a sample containing 30 detached double-lined eclipsing binaries with accurate (≃1-2%) determination of mass and radius and available uvbyHβ photometric data is also presented. Correction of the differences in terms of Teff and logg for the range 11000K<Teff<20000K reduces the mean residuals from 0.13dex to 0.07dex. For the range 7000K<Teff<8500K, the consideration of metallicity effects by means of δmo index improves the accuracy from 0.20dex to 0.09dex. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 125 60 uvbyHβ photometry for 30 detached eclipsing binaries
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Identification name (Name, HD, BD) 13 A1 --- m_Name Component: A=primary, B=secondary 16- 20 A5 --- SpType Spectral type 22- 23 I2 h RAh Right Ascension J2000 (hours) (4) 25- 26 I2 min RAm Right Ascension J2000 (minutes) (4) 28- 31 F4.1 s RAs Right Ascension J2000 (seconds) (4) 33 A1 --- DE- Declination J2000 (sign) (4) 34- 35 I2 deg DEd Declination J2000 (degrees) (4) 37- 38 I2 arcmin DEm Declination J2000 (minutes) (4) 40- 41 I2 arcsec DEs Declination J2000 (seconds) (4) 43- 48 F6.3 mag Vmag Visual apparent magnitude 50- 53 F4.3 mag e_Vmag ? Error in Vmag 55- 59 F5.3 mag (b-y) b-y index 61- 64 F4.3 mag e_(b-y) ? Error in b-y 66- 70 F5.3 mag m1 m1 index ((v-b) - (b-y)) 72- 75 F4.3 mag e_m1 ? Error in m1 77- 81 F5.3 mag c1 c1 index ((u-v) - (v-b)) 83- 86 F4.3 mag e_c1 ? Error in c1 88- 92 F5.3 mag beta Hβ index 94- 97 F4.3 mag e_beta ? Error in beta 99-103 F5.3 [cm/s2] logg(emp) ? Empirical determination of logg (1) 105-108 F4.2 [cm/s2] logg(MD) ? Photometric determination of logg (2) 110-113 F4.2 [cm/s2] logg(cor) ? Corrected photometric determination of logg 115-119 I5 K Teff(MD) ? Photometric determination of effective temperature (2) 121-122 A2 --- Notes Notes (3)
Note (1): From light and radial velocity curve analysis. Errors in logg(emp) can be found in Andersen (1991A&ARv...3...91A) and range from 0.007 to 0.025dex with a mean value of 0.014dex. Note (2): Photometric determination using MD grids and NSW interpolation. Estimated errors in logg(MD) and Teff(MD) increase from 0.15 to 0.30dex and from 200 to 1200K, respectively, when the temperature increases from 6000 to 20000K Note (3): a. Clausen J.V., 1991A&A...246..397C b. Clausen J.V., 1996A&A...308..151C c. Nordstroem B., Johansen K.T., 1994A&A...282..787N d. Nordstroem B., Johansen K.T., 1994A&A...291..777N e. Popper D.M., Andersen J., Clausen J.V., Nordstrom B., 1985AJ.....90.1324P f. Andersen J., Clausen J.V., 1989A&A...213..183A g. Andersen J., Clausen J.V., Nordstrom, B., Reipurth B., 1983A&A...121..271A h. This work i. Gronbech B., Gyldenkerne K., Jorgensen H.E., 1977A&A....55..401G j. Clausen J.V., Gimenez A., 1991A&A...241...98C k. Clausen J.V., Nordstrom B., 1980A&A....83..339C l. Luminosity ratios from Jorgensen H.E., Gyldenkerne K., 1975A&A....44..343J m. Jorgensen H.E., Gronbech B., 1978A&A....66..377J n. Gimenez A., 1994, private communication o. Clausen J.V., Nordstrom B., 1978A&A....67...15C p. Andersen J., Clausen J.V., Gimenez A., 1993A&A...277..439A q. Andersen J., Clausen J.V., Nordstrom B., 1987A&A...175...60A r. Clausen J.V., Gronbech B., 1976A&A....48...49C s. Clausen J.V., Gimenez A., Scarfe C.D., 1986A&A...167..287C t. Andersen J., Clausen J.V., Nordstrom B., 1990A&A...228..365A u. VandenBerg D.A., Hrivnak B.J., 1985ApJ...291..270V v. Clausen J.V., Gyldenkerne K., Gronbech B., 1976A&A....46..205C w. Luminosity ratios from Vaz L.P.R., Andersen J., 1984A&A...132..219V x. Andersen J., Clausen J.V., Nordstrom B., 1984A&A...134..147A y. Clausen J.V., Gyldenkerne K., Gronbech B., 1977A&A....58..121C z. Andersen J., Clausen J.V., Nordstrom B., Popper D.M., 1985A&A...151..329A aa. Clausen J.V., Gronbech B., 1977A&A....58..131C ab. Andersen J., Clausen J.V., Nordstrom B., 1984A&A...137..281A * beta{A} and beta{B} computed from joint beta and beta{Min I} Note (4): The coordinates have been added at CDS.
Acknowledgements: Carme Jordi
(End) Patricia Bauer [CDS] 29-May-1997
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