2001A&A...378..936J


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET23:36:21

2001A&A...378..936J - Astronomy and Astrophysics, volume 378, 936-945 (2001/11-2)

BI Lyncis: A hydrogen-deficient binary consisting of two low-mass giants of spectral types early-B and G.

JEFFERY C.S. and AZNAR CUADRADO R.

Abstract (from CDS):

object{BI Lyn} has previously been misclassified as an evolved binary system containing either a hot subdwarf or white dwarf and a thick accretion disk. New intermediate dispersion spectra are presented which demonstrate clearly that the hot component is a luminous low-mass helium star and the cool companion is a rapidly rotating G-type giant. Techniques of spectrum synthesis have been used to establish the dimensions of both components. Although the orbital period of the system remains unknown, other phenomena are entirely consistent with these observed dimensions. A ∼0.34d periodic photometric variation could be explained by pulsations in the B-type primary and, by analogy with other H-deficient binaries, it is suggested that the variable absorption in Hα may be due to a gas stream flowing through the inner Lagrangian point.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: binaries - stars: chemically peculiar - stars: individual: BI Lyn

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 30353 sg* 04 48 53.3476426387 +43 16 32.094009964 8.05 8.22 7.76     A5Iap 131 0
2 V* BY Lyn LP* 07 28 43.5340568081 +47 55 14.696412285   8.18 6.73     M3 18 0
3 V* BI Lyn No* 09 03 19.4275296265 +39 51 00.497866777   13.10 12.848     DB 23 0
4 LS 1922 SB* 10 47 56.8672551889 -59 08 53.132559788 11.04 11.24 10.44 10.30   OB+ 42 0
5 HD 128220 SB* 14 35 15.7846989338 +19 12 54.511945549   8.724 8.503     G0IIIn+sdO 108 0
6 HD 320156 Em* 17 37 58.5049642529 -35 23 04.258134273 10.52 10.61 9.78 9.85   B4Ibe 63 0
7 HD 160641 HS* 17 41 51.5794261316 -17 53 48.460430048 9.15 10.01 9.85 10.08 9.59 sdOC9.5II-IIIHe40 114 0
8 V* PV Tel s?b 18 23 14.6620305263 -56 37 44.140122617 8.60 9.20 9.30     B5?I?pec 108 0
9 * ups Sgr Be* 19 21 43.6228354 -15 57 18.062473 4.18 4.71 4.61 4.34 4.21 F2p 283 0

    Equat.    Gal    SGal    Ecl

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2019.11.21-23:36:21

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