2005A&A...429..599C


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.20CEST18:59:03

2005A&A...429..599C - Astronomy and Astrophysics, volume 429, 599-605 (2005/1-2)

Spectroscopic monitoring of the transition phase in nova V4745 Sgr.

CSAK B., KISS L.L., RETTER A., JACOB A. and KASPI S.

Abstract (from CDS):

We present a spectroscopic monitoring of the transient nova V4745 Sagittarii (Nova Sgr 2003 #1) covering ten months after its discovery. During this period the light curve showed a well expressed transient phase in the form of six rebrightenings, and the presented dataset is one of the best spectroscopic coverages of a classical nova during the transition phase. Low- and medium-resolution spectra revealed that the majority of spectral lines switched back to strong P-Cyg profiles during the mini-outbursts, similar to the spectra just after the major eruption. We interpret the observed phenomena as evidence for ``echo-outbursts'' resulting in episodes of secondary mass-ejections and propose that the transition phase in classical novae is driven by repetitive instabilities of the hydrogen shell burning on the surface of the white dwarf. From the available light curve data we estimate the absolute magnitude of the system of about -8.3mag ±0.5mag. All spectrophotometric evidence point toward a very low (E(B-V)<0.1mag) interstellar reddening, leading to a rough distance estimate of V4745 Sgr (9kpc<d<19kpc).

Abstract Copyright:

Journal keyword(s): novae, cataclysmic variables - stars: individual: V4745 Sgr

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 854 0
2 NOVA LMC 1988 b No* 05 08 01.07 -68 37 37.5           ~ 36 0
3 V* CP Pup No* 08 11 46.0634990913 -35 21 04.986286529   15.0 15.00     ~ 244 1
4 V* DQ Her No* 18 07 30.2510755201 +45 51 32.564649735   12.99 15.16 11.46   M3+Ve 952 1
5 NOVA Sgr 2003 b No* 18 10 10.42 -27 45 35.2     8.8     ~ 22 0
6 NGC 6652 GlC 18 35 45.63 -32 59 26.6   10.64 9.75     ~ 332 1
7 NOVA Sgr 2003 No* 18 40 02.54 -33 26 55.1           ~ 50 0
8 M 70 GlC 18 43 12.76 -32 17 31.6   9.76 9.06     ~ 305 0
9 V* V603 Aql No* 18 48 54.6369118792 +00 35 02.855110952 10.73 11.65 11.64     OB+e: 504 0
10 NOVA Sct 1989 No* 18 49 38.95 -06 11 15.9   10.97 10.48     ~ 67 0
11 NOVA Sct 1975 No* 18 55 26.71 -07 43 05.5   6.1       ~ 54 0
12 NOVA Sgr 2002 c No* 19 01 09.38 -22 00 05.9           ~ 120 0
13 V* V1494 Aql No* 19 23 05.30 +04 57 19.1           ~ 144 0
14 V* V1974 Cyg No* 20 30 31.61 +52 37 51.3           ~ 531 0
15 V* DK Lac No* 22 49 46.9314859439 +53 17 19.799282044   5.00       ~ 102 0

    Equat.    Gal    SGal    Ecl

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2019.07.20-18:59:03

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