Article (Scientific journals)
Universality of the companion mass-ratio distribution
Reggiani, Maddalena; Meyer, M. R.
2013In Astronomy and Astrophysics, 553
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Keywords :
binaries: general; stars: formation; stars: low-mass; stars: solar-type
Abstract :
[en] <BR /> Aims: We present new results regarding the companion mass-ratio distribution (CMRD) of stars, as a follow-up of our previous work. <BR /> Methods: We used a maximum-likelihood-estimation method to re-derive the field CMRD power law avoiding dependence on the arbitrary binning. We also considered two new surveys of multiples in the field for solar-type stars and M dwarfs to test the universality of the CMRD. <BR /> Results: We found no significant differences in the CMRD for M dwarfs and solar-type stars compared with previous results over the common mass ratio and separation range. The new best-fit power law of the CMRD in the field, combining two previous sets of data, is dN/dq ∝ q[SUP]β[/SUP], with β = 0.25 ± 0.29.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Reggiani, Maddalena ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Meyer, M. R.;  Institute of Astronomy, ETH Zurich, 8093, Zurich, Switzerland)
Language :
English
Title :
Universality of the companion mass-ratio distribution
Publication date :
01 May 2013
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
553
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 August 2017

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