MULTIPLICITY AMONG F-TYPE STARS

作者：Fuhrmann K^*; Chini R

来源：Astrophysical Journal, The - Supplement Series, 2012, 203(2): 30.

DOI：10.1088/0067-0049/203/2/30

• solar neighborhood
• stars: fundamental parameters
• stars: solar-type
• stars: statistics

As part of a homogeneous all-sky volume-complete sample of half a thousand solar-type stars within 25 pc we present a census for the subset of the 150-mostly F-type stars-in the mass range 1.1M(circle dot) %26lt;= M %26lt;= 1.7M(circle dot) in terms of their observed multiplicities. The major obstacle, as expected, arises from the onset of stellar rotation in this mass range for it continues to support many hidden companions. Yet, a solid increase of the fraction of binary and higher level systems as a function of the primary mass is manifest. There is even the prospect that on account of many companion candidates the single-star fraction may already converge to zero at the transition to the A-type stars.

• 出版日期2012-12