2001ApJ...547.1057S

Query : 2001ApJ...547.1057S

2001ApJ...547.1057S - Astrophys. J., 547, 1057-1070 (2001/February-1)

Non-LTE modeling of Nova Cygni 1992.

SHORT C.I., HAUSCHILDT P.H., STARRFIELD S. and BARON E.

Abstract (from CDS):

We present a grid of nova models that have an extremely large number of species treated in non-LTE and apply it to the analysis of an extensive time series of ultraviolet spectroscopic data for Nova Cygni 1992. We use ultraviolet colors to derive the time development of the effective temperature of the expanding atmosphere during the fireball phase and the first 10 days of the optically thick wind phase. We find that the nova has a pure, optically thick wind spectrum until about 10 days after the explosion. During this interval, we find that synthetic spectra based on our derived temperature sequence agree very well with the observed spectra. We find that a sequence of hydrogen-deficient models provides an equally good fit, provided the model effective temperature is shifted upward by ∼1000 K. We find that high-resolution UV spectra of the optically thick wind phase are fit moderately well by the models. We find that a high-resolution spectrum of the fireball phase is better fit by a model with a steep density gradient, similar to that of a supernova, than by a nova model.

Abstract Copyright: ∼

Journal keyword(s): Stars: Novae, Cataclysmic Variables - Stars: Atmospheres - Stars: Individual: Constellation Name: Nova Cygni 1992 - Stars: Individual: Constellation Name: V1974 Cygni - Ultraviolet: Stars

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V1974 Cyg No* 20 30 31.6546001712 +52 37 50.837478240           ~ 597 0

Query : 2001ApJ...547.1057S

Basic data :
V* V1974 Cyg -- Classical Nova
Other object types: otypes_help 		No* (2003AstL,NOVA), V* (V*,AAVSO), UV (2EUVE,EUVE), MIR (WISEA,WISE), CV* (2020MNRAS), * (Gaia), X (RX), NIR (2MASS)
ICRS coord. (ep=J2000) : 		20 30 31.6546001712 +52 37 50.837478240 (Optical) [ 0.0457 0.0505 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		20 29 07.1145900013 +52 27 41.737439525 [ 0.0457 0.0505 90 ]
Gal coord. (ep=J2000) : 		089.1337631365801 +07.8191442989891 [ 0.0457 0.0505 90 ]
Proper motions mas/yr : 		-2.155 -6.102 [0.061 0.061 90] A 2020yCat.1350....0G
Parallaxes (mas): 		0.6211 [0.0541] A 2020yCat.1350....0G
Fluxes (4) :
G 17.1941 [0.0047] C 2018yCat.1345....0G
J 15.672 [0.069] C 2003yCat.2246....0C
H 15.283 [0.098] C 2003yCat.2246....0C
K 15.205 [0.157] D 2003yCat.2246....0C
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Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NOVA Cyg 1992 2MASS J20303161+5237513 V* V1974 Cyg AAVSO 2027+52
2EUVE J2030+52.6 RX J2030.5+5237 WISEA J203031.59+523751.8 Gaia DR2 2181756563616247552
EUVE J2030+52.6 TIC 278447515 WISE J203031.59+523751.8 Gaia DR3 2181756563616247552

References (597 between 1850 and 2026) (Total 597)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 2    Plx : 2    PM : 2   

   

Observing logs
ISO : 14    IUE : 300   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* V1974 Cyg

Link by name to the catalogue in VizieR :

EUVE J2030+52.6 2MASS J20303161+5237513 V* V1974 Cyg WISEA J203031.59+523751.8 WISE J203031.59+523751.8
Gaia DR2 2181756563616247552 Gaia DR3 2181756563616247552

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