/ftp/cats/J_other/RMxAA/38.129



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J/other/RMxAA/38.129    Stellar Spectral Classification. II.     (Stock+, 2002)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	table3[ab].dat table6[ab].dat table3[cd].dat table6[cd].dat
	table4[ab].dat table7[ab].dat table4[cd].dat table7[cd].dat
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Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/other/RMxAA/38.129
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drwxr-xr-x 29 cats archive 4096 Dec 17 2020 [Up] drwxr-xr-x 2 cats archive 4096 May 26 2021 [TAR file] -rw-r--r-- 1 cats archive 585 Jan 6 2003 .message -r--r--r-- 1 cats archive 11955 Jan 6 2003 ReadMe -rw-r--r-- 1 cats archive 213 Sep 19 2007 +footg5.gif -rw-r--r-- 1 cats archive 2047 Mar 5 2008 +footg8.gif -r--r--r-- 1 cats archive 550 Sep 26 2002 table3a.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 550 Sep 26 2002 table3b.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 850 Sep 26 2002 table3c.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 850 Sep 26 2002 table3d.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 680 Sep 26 2002 table4a.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 680 Sep 26 2002 table4b.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1280 Sep 26 2002 table4c.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1280 Sep 26 2002 table4d.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 550 Sep 26 2002 table6a.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 550 Sep 26 2002 table6b.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 850 Sep 26 2002 table6c.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 850 Sep 26 2002 table6d.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 680 Sep 26 2002 table7a.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 680 Sep 26 2002 table7b.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1280 Sep 26 2002 table7c.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1280 Sep 26 2002 table7d.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : J/other/RMxAA/38.129 Stellar Spectral Classification. II. (Stock+, 2002) ================================================================================ Quantitative Stellar Spectral Classification. II. Early Stars. Stock J., Stock M., Garcia J., Sanchez N. <Rev. Mex. Astron. Astrofis., 38, 129 (2002)> =2002RMxAA..38..129S ================================================================================ ADC_Keywords: Stars, early-type ; MK spectral classification ; Magnitudes, absolute ; Equivalent widths Keywords: Stars: Fundamental Parameters Abstract: The method developed by Stock & Stock (1999RMxAA..35..143S) for stars of spectral types A to K to derive absolute magnitudes and intrinsic colors from the equivalent widths of absorption lines in stellar spectra is extended to B-type stars. Spectra of this type of stars for which the Hipparcos catalogue gives parallaxes with an error of less than 20% were observed with the CIDA 1-meter reflector equipped with a Richardson spectrograph with a Thompson 576x384 CCD detector. The dispersion is 1.753AA/pixel using a 600 lines/mm grating in the first order. In order to cover the spectral range 3850AA to 5750AA the grating had to be used in two different positions, with an overlap in the region from 4800AA to 4900AA. A total of 116 stars was observed, but not all with both grating positions. A total of 12 measurable absorption lines were identified in the spectra and their equivalent widths were measured. These were related to the absolute magnitudes derived from the Hipparcos catalogue and to the intrinsic colors (deduced from the MK spectral types) using linear and second order polynomials and two or three lines as independent variables. The best solutions were obtained with polynomials of three lines, reproducing the absolute magnitudes with an average residual of about 0.40 magnitudes and the intrinsic colors with an average residual of 0.016 magnitudes. Description: The following tables contains the 10 best linear and quadratic solutions to calculate the absolute magnitudes and the intrinsic colors, using two or three equivalent widths of some absorption lines. Also, their average residual, the number of used and eliminated stars for each combination are given, as well as the coefficients obtained for the respective terms.

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