2009MNRAS.399.1534C


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.09CEST19:51:00

2009MNRAS.399.1534C - Mon. Not. R. Astron. Soc., 399, 1534-1538 (2009/November-1)

SY Cnc, a case for unstable mass transfer{quest}.

CASARES J., MARTINEZ-PAIS I.G. and RODRIGUEZ-GIL P.

Abstract (from CDS):

Intermediate-resolution (0.5-1 Å) optical spectroscopy of the cataclysmic variable (CV) SY Cnc reveals the spectrum of the donor star. Our data enable us to resolve the orbital motion of the donor and provide a new orbital solution, binary mass ratio and spectral classification. We find that the donor star has spectral-type G8±2 V and orbits the white dwarf with P = 0.3823753 ±0.0000003 d, K2= 88.0±2.9 km/s and V sini = 75.5 ±6.5 km/s. Our values are significantly different from previous works and lead to q = M2/M1= 1.18±0.14. This is one of the highest mass ratios known in a CV and is very robust, because it is based on resolving the rotational broadening over a large number of metallic absorption lines. The donor could be a slightly evolved main sequence or descendant from a massive star which underwent an episode of thermal time-scale mass transfer.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): accretion, accretion discs - stars: individual: SY Cnc - novae, cataclysmic variables

Status at CDS:  

Simbad objects: 14

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Number of rows : 14

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 17925 RS* 02 52 32.1281853696 -12 46 10.970649463 7.48 6.91 6.05 5.34 4.89 K1V 467 0
2 * 58 Eri BY* 04 47 36.2917607568 -16 56 04.041927355   6.14 5.50     G2.5IV-V 381 0
3 V* V363 Aur NL* 05 33 33.4591303805 +36 59 32.474128763     14.2     K0V 91 0
4 * pi. Men PM* 05 37 09.8851202601 -80 28 08.831347245   6.25 5.67     G0V 224 1
5 HD 43162 BY* 06 13 45.2955618090 -23 51 42.968779940   7.068 6.366 5.94 5.61 G6.5V 145 0
6 HD 69830 PM* 08 18 23.9469692487 -12 37 55.810202572   6.74 5.95     G8:V 456 2
7 V* AC Cnc EB* 08 44 27.1122164614 +12 52 31.996499274   13.80 14.15     K1-3V 122 0
8 V* SY Cnc DN* 09 01 03.3196276716 +17 53 56.031352233   12.3 10.60 12.971   G8V 143 0
9 HD 157881 PM* 17 25 45.2323043669 +02 06 41.123668100 10.126 8.865 7.56 6.649 5.89 K7V 308 0
10 V* AE Aqr DQ* 20 40 09.1598509019 -00 52 15.057042857   12.46 10.40   10.191 K3-5IV/V 602 0
11 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 937 0
12 * 61 Cyg B Fl* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 665 1
13 V* TW PsA BY* 22 56 24.0532946025 -31 33 56.035064606   7.58 6.48     K4Ve 267 0
14 HD 222237 PM* 23 39 37.3871312596 -72 43 19.757339908 8.912 8.088 7.087 6.502 5.987 K3+V 136 0

    Equat.    Gal    SGal    Ecl

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2020.04.09-19:51:00

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