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HD 100679

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Pulkovo compilation of radial velocities for 35495 stars in a common system. Not Available
Late A-type stars: new Strömgren photometric calibrations of absolute magnitudes from HIPPARCOS Hipparcos trigonometric parallaxes have been used to derive aphotometric absolute magnitude calibration of main-sequence late A-typestars in terms of Strömgren photometric indices - accounting fortemperature, evolution and metallicity effects - and projectedequatorial rotational velocities. The derived calibrations are valid formain-sequence normal A3-A9 and metallic Am stars, showing residuals of0.22 and 0.20 magnitudes, respectively. One of the fitting methods used(BCES) allows the derivation of the observational ZAMS in this spectralrange, showing an excellent accordance with theoretical evolutionarymodels. The evolutionary state of the Am stars is also discussed.Table~A1 is only available in electronic form from CDS via anonymous ftp130.79.128.5, and by e-mail: request to cesca@am.ub.es
Lists of photometric AM candidates The Geneva photometric m parameter (Nicolet and Cramer, 1982) is used inorder to select Am photometric candidates from the Rufener (1981)catalogue. Two lists are given, the first containing field stars and thesecond cluster stars. According to the photometric criteria thediffusion process probably responsible for the Am phenomenon takes placerather quickly as Am candidates are present in young clusters. It isconfirmed that the phenomenon is enhanced by low rotational velocity andhigh metallicity. The age seems to slightly affect the Am phenomenon.
Properties of AM stars in the Geneva photometric system Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&A....92..289H&db_key=AST
Multicolor photometry of metallic-line stars. III. A photometric catalogue Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974RMxAA...1..175M&db_key=AST
Catalogue of AM stars with known spectral types Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973A&AS...10..385H&db_key=AST
UVBY photometry of AM and AP stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973AJ.....78..192W&db_key=AST
Photoelectric UBV observations made on the Palomar 20-inch telescope Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973MNRAS.164..133P&db_key=AST
Interstellar reddening near the north galactic pole Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972PASP...84..497F&db_key=AST
Spectra and colors of A-type stars in a north galactic pole region. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1968AJ.....73..152S&db_key=AST
A finding-list of stars of spectral type F2 and earlier in a north galactic pole region. Not Available

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Buyuk Ayi
Sað Açýklýk:	11^h35^m21.61^s
Yükselim:	+34Â°30'34.9"
Görünürdeki Parlaklýk:	8.976
özdevim Sað Açýklýk:	-15.7
özdevim Yükselim:	10.9
B-T magnitude:	9.233
V-T magnitude:	8.998

Kataloglar ve belirtme:

Özgün isimleri	(Edit)
HD 1989	HD 100679
TYCHO-2 2000	TYC 2525-4-1
USNO-A2.0	USNO-A2 1200-06751714
HIP	HIP 56523

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