2009MNRAS.394.1551N


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.28CET17:06:29

2009MNRAS.394.1551N - Mon. Not. R. Astron. Soc., 394, 1551-1558 (2009/April-2)

Near-infrared observations of the novae V2491 Cygni and V597 Puppis.

NAIK S., BANERJEE D.P.K. and ASHOK N.M.

Abstract (from CDS):

We present results obtained from near-infrared JHK spectroscopic observations of novae V2491 Cygni and V597 Puppis in the early declining phases of their 2007 and 2008 outbursts, respectively. In both objects, the spectra displayed emission lines of Hi, Oi, He i and Ni. In V597 Pup, the Hei lines were found to strengthen rapidly with time. Based on the observed spectral characteristics, both objects are classified as He/N novae. We have investigated the possibility of V2491 Cyg being a recurrent nova as has been suggested. By studying the temporal evolution of the linewidths in V2491 Cyg, it appears unlikely that the binary companion is a giant star with heavy wind as in recurrent novae of the RS Oph type. Significant deviations from that of recombination case B conditions are observed in the strengths of the Hi lines. This indicates that the Hi lines, in both novae, are optically thick during the span of our observations. The slope of the continuum spectra in both cases was found to have a λ–(3–3.5) dependence which deviates from a Rayleigh-Jeans spectral distribution. Both novae were detected in the post-outburst supersoft X-ray phase; V2491 Cyg being very bright in X-rays has been the target of several observations. We discuss and correlate our infrared observations with the observed X-ray properties of these novae.

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

Journal keyword(s): techniques: spectroscopic - stars: individual (V597 Pup, V2491 Cyg) - novae, cataclysmic variables - infrared: stars

Status at CDS:  

Simbad objects: 26

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Number of rows : 26

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 NOVA LMC 1995 No* 05 26 50.15 -70 01 26.4           ~ 40 1
2 * f Pup ** 07 37 22.10978 -34 58 06.7109 4.13 4.44 4.53 4.55 4.62 B8IV/V 58 1
3 NOVA Pup 2004 No* 07 41 53.76 -27 06 36.9     6.93     ~ 46 0
4 * l Pup sg* 07 43 48.4687222 -28 57 17.372015 4.06 4.09 3.93 3.68 3.50 A4Iabe 174 0
5 V* V597 Pup No* 08 16 17.953 -34 15 25.19   21.65       ~ 40 0
6 NOVA Vel 1999 No* 10 44 48.39 -52 25 30.7           ~ 167 0
7 NOVA Mus 1983 No* 11 52 02.35 -67 12 20.2   7.2       ~ 249 0
8 NOVA Sco 1863 No* 16 22 30.7782086963 -17 52 43.162570042   8.80 8.70     F8+K2 461 0
9 NOVA Sco 2007 a No* 16 57 40.91 -32 20 36.4           ~ 89 0
10 V* V2487 Oph No* 17 31 59.805 -19 13 56.13   18.0       ~ 101 0
11 V* RS Oph No* 17 50 13.1592776879 -06 42 28.481553668   12.29 4.30     OB+M2ep 918 0
12 V* V4643 Sgr No* 17 54 40.4173452507 -26 14 15.475228923   17.4       ~ 42 0
13 NOVA CrA 1987 No* 18 00 25.97 -39 00 35.1           ~ 123 0
14 NOVA Sgr 1998 No* 18 21 40.49 -27 31 37.3           ~ 77 0
15 * gam Lyr * 18 58 56.6224137 +32 41 22.400295 3.140 3.200 3.250 3.27 3.28 B9III 266 0
16 NOVA Sgr 2002 c No* 19 01 09.38 -22 00 05.9           ~ 122 0
17 NOVA Aql 1999 No* 19 07 36.90 +12 31 26.2           ~ 65 0
18 NOVA Aql 1993 No* 19 13 06.80 +01 34 23.3           ~ 72 0
19 V* V1494 Aql No* 19 23 05.30 +04 57 19.1           ~ 145 0
20 NOVA Cyg 2008 b No* 19 43 01.9773145314 +32 19 13.545320806 18.27 18.72 18.03 17.72 17.41 ~ 134 0
21 HD 186440 * 19 43 09.5977623166 +30 40 40.403002377   6.071 6.075     A1V 42 0
22 * 15 Vul a2* 20 01 06.0484585 +27 45 12.863884   4.829 4.651     A4III 223 0
23 NOVA Cyg 2001 No* 20 07 17.94 +36 04 37.2           ~ 53 0
24 V* V1974 Cyg No* 20 30 31.61 +52 37 51.3           ~ 534 0
25 NOVA Cyg 2006 No* 21 11 32.346 +44 48 03.66   10.5 8.5     ~ 90 1
26 V* V1500 Cyg No* 21 11 36.5811336631 +48 09 01.950330133   17.9       ~ 736 0

    Equat.    Gal    SGal    Ecl

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2020.03.28-17:06:29

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