2001A&A...373..222N


Query : 2001A&A...373..222N

2001A&A...373..222N - Astronomy and Astrophysics, volume 373, 222-235 (2001/7-1)

NLTE accretion disc models for the AM Canum Venaticorum systems.

NASSER M.R., SOLHEIM J.-E. and SEMIONOFF D.A.

Abstract (from CDS):

We present models of the optical spectra of two types of accretion disc atmospheres: a pure helium model and a H-He model, in a low mass ratio, helium transferring, interacting binary white dwarf system. The computations are restricted to stationary discs in LTE and NLTE cases. We also investigate the influence on the spectra of some of the disc parameters such as the mass accretion rate, the angle of inclination, the H/He mass ratio, and the inner and outer radius of the disc. Departures from LTE are also investigated in order to assess the necessity of computing more complicated and more time consuming models. We found that differences in predicted equivalent widths of helium line computed in LTE and NLTE models range between 10 and 40 percent. Finally we compare our disc models with 4 of the AM CVn systems observed with the Nordic Optical Telescope: AM CVn, HP Lib, V803 Cen and CR Boo to determine their parameters as mass transfer rates and inclinations of their discs.

Abstract Copyright:

Journal keyword(s): stars: novae, cataclysmic variables - accretion discs - individual: AM CVn, HP Lib, V803 Cen, CR Boo

CDS comments: p.222: RX J1914.4+245 = RX J1914.4+2456, table 2: PG 1606+422 = WD 1606+422

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PHL 1475 CV* 03 10 32.7658212837 -09 45 06.154763507           DB+ 89 0
2 GD 71 WD* 05 52 27.6197286025 +15 53 13.228639956 11.675 12.783 13.032 13.169 13.337 DA1.5 346 0
3 LAWD 32 WD* 09 46 39.0736152665 +43 54 52.235353533   13.39   13.8   DA3.8 96 0
4 PG 1022+050 WD* 10 24 59.8259661630 +04 46 10.498562889   14.37 14.20 14.2   DA3.5 48 0
5 V* AM CVn CV* 12 34 54.6230046722 +37 37 44.120772480   14.02 14.13 14.47   DBnnp 385 0
6 G 61-29 CV* 13 05 42.4008232413 +18 01 03.765282516   15.59   15.9   DBe 245 0
7 HZ 43A WD* 13 16 21.8529879473 +29 05 55.413524767   12.52 12.66     DAwk 456 0
8 V* V803 Cen CV* 13 23 44.5334901172 -41 44 29.260966080   16.8 14.42     ~ 141 0
9 V* CR Boo CV* 13 48 55.1859261603 +07 57 35.927051968     15.00     ~ 169 0
10 V* HP Lib CV* 15 35 53.0716707077 -14 13 12.217891145   13.55       Bpec 93 0
11 EGGR 116 WD* 16 08 22.1888382580 +42 05 43.437369514   13.91   13.7   DA3.8 39 0
12 RX J1914.4+2456 XB* 19 14 26.09 +24 56 44.6           ~ 127 0
13 V* KL Dra CV* 19 24 38.2451670877 +59 41 46.722317032   16.8       DB+ 54 1

    Equat.    Gal    SGal    Ecl

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2021.07.25-21:15:18

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