Magnetic stars
type: Concept
narrower: Am stars

Am stars
type: Concept
contributor: AAS Frey.Katie
broader: Chemically peculiar stars
broader: Magnetic variable stars
broader: Magnetic stars
broader: A stars
alternative label: Metallic-line stars
alternative label: Am-type stars
alternative label: Metallic line stars
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.
modified: 2020-11-03T17:57:19.707Z
modified: 2020-11-03T17:57:39.528Z

Chemically peculiar stars
type: Concept
narrower: Am stars

Magnetic variable stars
type: Concept
narrower: Am stars

A stars
type: Concept
narrower: Am stars