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HD 17568

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Radial-velocity measurements. V - Ground support of the HIPPARCOS satellite observation program The paper presents data on 1070 radial velocity measurements of starsdistributed in 39 fields measuring 4 deg x 4 deg. The PPO series ofFehrenbach et al. (1987) and Duflot et al. (1990) is continued using theFehrenbach objective prism method.
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
Classification spectrale d'etoiles AP et Am. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975A&AS...21...25F&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
Spektral-Durchmusterung von Milchstrassenfeldern. Not Available

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观测天体数据

星座:	英仙座
右阿森松:	02^h50^m40.73^s
赤纬:	+44Â°21'31.8"
视星:	9.047
右阿森松适当运动:	17.2
赤纬适当运动:	-5.8
B-T magnitude:	9.526
V-T magnitude:	9.087

目录:

适当名称
HD 1989	HD 17568
TYCHO-2 2000	TYC 2858-122-1
USNO-A2.0	USNO-A2 1275-01793254
HIP	HIP 13266

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