Query : 2010A&A...524A..14B

2010A&A...524A..14B - Astronomy and Astrophysics, volume 524, A14-14 (2010/12-1)

A renaissance study of Am stars. I. The mass ratio distribution.


Abstract (from CDS):

Triggered by the study of Carquillat & Prieur ([CP07], 2007MNRAS.380.1064C) of Am binaries, I reanalyse their sample of 60 orbits to derive the mass ratio distribution (MRD), assuming as they did a priori functional forms, i.e. a power law or a Gaussian. The sample is then extended using orbits published by several groups and a full analysis of the MRD is made, without any assumption on the functional form. I derive the MRD using a Richardson-Lucy inversion method, assuming a fixed mass of the Am primary and randomly distributed orbital inclinations. Using the large sub-sample of double-lined spectroscopic binaries, I show that this methodology is indeed perfectly adequate. I first derive new parameters of the functional form for the Carquillat & Prieur sample. Using the inversion method, applied to my extended sample of 162 systems, I find that the final MRD can be approximated by a uniform distribution.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - binaries: spectroscopic - methods: statistical

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2888 0
2 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1421 0

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