High Speed Photometry and Spectroscopy of Novae at Quiescence

被引：0
|
作者：
Egan, J. M. [1 ]
Woudt, P. A. [1 ]
Warner, B. [1 ]
Williams, R. E. [2 ]
Steeghs, D. T. H. [3 ]
Ribeiro, V. A. R. M. [1 ]
机构：
[1] Univ Cape Town, Dept Astron, Astrophys Cosmol & Grav Ctr, Private Bag X3, ZA-7701 Rondebosch, South Africa
[2] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
来源：
STELLA NOVAE: PAST AND FUTURE DECADES | 2014年 / 490卷
关键词：
FAINT CATACLYSMIC VARIABLES; OLD NOVA; INTERMEDIATE POLAR; MASS; ERUPTION; CEN; CANDIDATES; DWARF; SHELL; LIFE;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present spectroscopy of Nova Velorum 1999 (V382 Vel) and Nova Sagittarii 1936c (V630 Sgr) obtained with the Southern African Large Telescope in May and July 2012 as part of our ongoing observing campaign of old novae. The SALT spectrum of V382 Vel is dominated by broad Ha emission associated with the nova shell. The other Balmer lines in the spectrum are narrower and single -peaked, with HP at similar line strength as Hell 4686 angstrom. The SALT spectrum of V630 Sgr is dominated by He II 4686 angstrom, emission lines are double-peaked (except the lines of the He II Pickering series) and show clear variations in multiple spectra obtained over one quarter of the binary orbit. Additional high speed photometry of V382 Vel has been obtained in 2012 using the new SHOC photometer of the South African Astronomical Observatory. It shows the emergence of large amplitude quasi-periodic variability with periodicities around similar to 30 minutes, not seen previously.
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页码：67 / 73
页数：7
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