Quantitative Stellar Spectral Classification. II. Early Type Stars
Fuente:
Redalyc
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
Universidad Nacional Autónoma de México
2002
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1876440185733906432 |
|---|---|
| author | M. J. Stock |
| author_facet | M. J. Stock |
| contents | Quantitative Stellar Spectral Classification. II. Early Type Stars M. J. Stock J. Stock N. Sánchez J. García Física, Astronomía y Matemáticas STARS: FUNDAMENTAL PARAMETERS The method developed by Stock & Stock (1999) for stars of spectral types Ato K to derive absolute magnitudes and intrinsic colors from the equivalent widthsof absorption lines in stellar spectra is extended to B-type stars. Spectra of thistype of stars for which the Hipparcos catalogue gives parallaxes with an error ofless than 20% were observed with the CIDA one-meter reflector equipped with aRichardson spectrograph with a Thompson 576_384 CCD detector. The dispersionis 1.753 A/pixel using a 600 lines/mm grating in the first order. In order to coverthe spectral range 3850 A to 5750 A the grating had to be used in two differentpositions, with an overlap in the region from 4800 A to 4900 A. A total of 116 starswas observed, but not all with both grating positions. A total of 12 measurableabsorption lines were identified in the spectra and their equivalent widths were measured.These were related to the absolute magnitudes derived from the Hipparcoscatalogue and to the intrinsic colors (deduced from the MK spectral types) usinglinear and second order polynomials and two or three lines as independent variables.The best solutions were obtained with polynomials of three lines, reproducing theabsolute magnitudes with an average residual of about 0.40 magnitudes and theintrinsic colors with an average residual of 0.016 magnitudes. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138202 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.38 |
| format | Artículo científico |
| id | redalyc_57138202 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Quantitative Stellar Spectral Classification. II. Early Type Stars M. J. Stock Física, Astronomía y Matemáticas STARS: FUNDAMENTAL PARAMETERS Quantitative Stellar Spectral Classification. II. Early Type Stars M. J. Stock J. Stock N. Sánchez J. García Física, Astronomía y Matemáticas STARS: FUNDAMENTAL PARAMETERS The method developed by Stock & Stock (1999) for stars of spectral types Ato K to derive absolute magnitudes and intrinsic colors from the equivalent widthsof absorption lines in stellar spectra is extended to B-type stars. Spectra of thistype of stars for which the Hipparcos catalogue gives parallaxes with an error ofless than 20% were observed with the CIDA one-meter reflector equipped with aRichardson spectrograph with a Thompson 576_384 CCD detector. The dispersionis 1.753 A/pixel using a 600 lines/mm grating in the first order. In order to coverthe spectral range 3850 A to 5750 A the grating had to be used in two differentpositions, with an overlap in the region from 4800 A to 4900 A. A total of 116 starswas observed, but not all with both grating positions. A total of 12 measurableabsorption lines were identified in the spectra and their equivalent widths were measured.These were related to the absolute magnitudes derived from the Hipparcoscatalogue and to the intrinsic colors (deduced from the MK spectral types) usinglinear and second order polynomials and two or three lines as independent variables.The best solutions were obtained with polynomials of three lines, reproducing theabsolute magnitudes with an average residual of about 0.40 magnitudes and theintrinsic colors with an average residual of 0.016 magnitudes. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138202 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.38 |
| title | Quantitative Stellar Spectral Classification. II. Early Type Stars |
| topic | Física, Astronomía y Matemáticas STARS: FUNDAMENTAL PARAMETERS |
| url | https://www.redalyc.org/articulo.oa?id=57138202 |