A Search for Close Binaries in the ρ Ophiuchi Star‐forming Region | Zendy

M. Barsony | Zendy; C. Koresko | Zendy; K. Matthews | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

A Search for Close Binaries in the ρ Ophiuchi Star‐forming Region

Author(s) -

M. Barsony,

C. Koresko,

K. Matthews

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/375532

Subject(s) - ophiuchus , physics , astrophysics , speckle imaging , population , binary number , infrared , multiplicity (mathematics) , stellar population , astronomy , stars , star formation , speckle pattern , optics , mathematics , geometry , arithmetic , demography , sociology

We have carried out a new, near-infrared speckle imaging survey of 19 membersof the young stellar population in the nearby (d=140 pc), Rho Ophiuchi cloudcore. Results for four binary and one newly discovered triple system arereported. Data for all known multiple systems among the pre-main-sequencepopulation of Rho Oph are tabulated. We define a "restricted binary fraction",Fbr, and a "restricted companion fraction", Fcr, as counting only those systemsmost detectable in the present and previous high-resolution near-infraredimaging surveys, having separations between 0.1-1.1 arcsec and K-band magnitudedifferences, Delta K < 3. Analysis of all the available multiplicity dataresults in updated values of Fbr=Fcr=24%+/-11% for the Ophiuchuspre-main-sequence population. These values are consistent with the values inthe Taurus star-forming region, and Fcr is in excess by a factor of 2 relativeto the Main Sequence at the 1-sigma level.Comment: 21 pages, 6 figures, 4 table

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research