2007A&A...464..697T


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.16CET04:02:59

2007A&A...464..697T - Astronomy and Astrophysics, volume 464, 697-700 (2007/3-3)

Monitoring the late decline of the old nova RW Ursae Minoris.

TAMBURINI F., DI MILLE F., BIANCHINI A. and JOHNSON P.

Abstract (from CDS):

New 2003-2006 time-resolved photometric observations of the old nova RW UMi (1956) confirm the QPO nature of the light modulations observed. The analysis of all our historical runs show that QPOs tend to cluster around frequencies 4.96d–1 and 12.4d–1 while the historical superhump period remains undetected in our data. Although the two main frequencies observed might appear to be aliases of the superhump frequency 17d–1, they should be produced by two independent mechanisms. These rather irregular QPOs might be explained by vertical oscillations of the inner regions of the accretion disk and/or by the cyclical generation in the disk of travelling density waves at the co-rotation radius of an inclined magnetic rotator. We find that the post-nova luminosity is decaying at a rate of ∼0.03mag/yr. If RW UMi is an intermediate polar system, during the decline the magnetospheric radius of the accreting white dwarf primary should increase and produce important changes in the periods of QPOs.

Abstract Copyright:

Journal keyword(s): stars: novae, cataclysmic variables - accretion, accretion disks

Simbad objects: 3

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Number of rows : 3

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* CP Pup No* 08 11 46.0634990913 -35 21 04.986286529   15.0 15.00     ~ 244 1
2 NOVA UMi 1956 No* 16 47 54.75 +77 02 12.2           ~ 71 0
3 V* V1974 Cyg No* 20 30 31.61 +52 37 51.3           ~ 532 0

    Equat.    Gal    SGal    Ecl

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2019.11.16-04:02:59

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