Am stars

http://astrothesaurus.org/uat/33

alt label
Am-type stars
Metallic line stars
Metallic-line stars
dcterms modified equal to or less than 2020-11-03T17:57:19.707Zequal to or more than 2020-11-03T17:57:19.707Z
broader
http://astrothesaurus.org/uat/226 original
narrower
33 original
http://astrothesaurus.org/uat/5 original
narrower
33 original
http://astrothesaurus.org/uat/995 original
narrower
33 original
http://astrothesaurus.org/uat/996 original
narrower
33 original
definition A chemically peculiar A- or early F-type star showing an overabundance of heavy elements and an underabundance of calcium and scandium. An Am star cannot receive a unique spectral type, as different methods (using the metallic lines, the hydrogen Balmer lines, and the calcium Ca II K-lines) yield three different spectral types. Contrarily to Ap stars, Am stars do not have significant external magnetic fields. Their rotational velocities are about 100-120 km s-1 smaller than those of Ap stars.
type
Resource original
Concept original
contributor AAS_Frey.Katie original