2001A&A...366..612B


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.16CET01:34:42

2001A&A...366..612B - Astronomy and Astrophysics, volume 366, 612-622 (2001/2-1)

The nature of dwarf nova outbursts.

BUAT-MENARD V., HAMEURY J.-M. and LASOTA J.-P.

Abstract (from CDS):

We show that if the dwarf-nova disc instability model includes the effects of heating by stream impact and tidal torque dissipation in the outer disc, the calculated properties of dwarf-nova outbursts change considerably, and several notorious deficiencies of this model are repaired. In particular: (1) outside-in outbursts occur for mass transfer rates lower than in the standard model as required by observations; (2) the presence of long (wide) and short (narrow) outbursts with similar peak luminosities is a natural property of the model. Mass-transfer fluctuations by factors ∼2 can explain the occurrence of both long and short outbursts above the cataclysmic variable period gap, whereas below 2 hr only short normal outbursts are expected (in addition to superoutbursts which are not dealt with in this article). With additional heating by the stream and tidal torques, such fluctuations can also explain the occurrence of both outside-in and inside-out outbursts in SS Cyg and similar systems. The occurrence of outside-in outbursts in short orbital-period, low mass-transfer-rate systems requires the disc to be much smaller than the tidal-truncation radius. In this case the recurrence time of both inside-out and outside-in outbursts have a similar dependence on the mass-transfer rate {dot}(M)2.

Abstract Copyright:

Journal keyword(s): accretion, accretion discs - instabilities - (stars:) novae, cataclysmic variables - (stars:) binaries: close

Simbad objects: 9

goto Full paper

goto View the reference in ADS

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 V* HT Cas DN* 01 10 13.1213309510 +60 04 35.489284826           M5.5e 365 0
2 V* U Gem DN* 07 55 05.2323858391 +22 00 05.045435077   15.3 14.54     DA 1039 0
3 V* SU UMa DN* 08 12 28.2694633475 +62 36 22.428029272           B2 467 0
4 V* Z Cam DN* 08 25 13.1988897787 +73 06 39.284432670   11.85 10.00     ~ 481 0
5 V* OY Car DN* 10 06 22.0792108747 -70 14 04.582997921           ~ 548 0
6 V* EX Dra DN* 18 04 14.2486747659 +67 54 12.271788519   14.5 14.7     ~ 108 0
7 V* WZ Sge DN* 20 07 36.5036203067 +17 42 14.733657651   15.30 15.20     DAepv 885 0
8 V* SS Cyg DN* 21 42 42.8034554117 +43 35 09.863763484 11.07 8.2 7.70     K5V 1203 1
9 V* IP Peg DN* 23 23 08.5362716048 +18 24 59.206210572           M2 353 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...366..612B and select 'bookmark this link' or equivalent in the popup menu


2019.11.16-01:34:42

© Université de Strasbourg/CNRS

    • Contact