2024MNRAS.528...28B

Query : 2024MNRAS.528...28B

2024MNRAS.528...28B - Mon. Not. R. Astron. Soc., 528, 28-38 (2024/February-2)

Soft X-ray and FUV observations of Nova Her 2021 (V1674 Her) with AstroSat.

BHARGAVA Y., DEWANGAN G.C., ANUPAMA G.C., KAMATH U.S., SONITH L.S., SINGH K.P., DRAKE J.J., BEARDMORE A., LUNA G.J.M., ORIO M. and PAGE K.L.

Abstract (from CDS):

Nova Her 2021 or V1674 Her was one of the fastest novae to be observed so far. We report here the results from our timing and spectral studies of the source observed at multiple epochs with AstroSat. We report the detection of a periodicity in the source in soft X-rays at a period of 501.4-501.5 s which was detected with high significance after the peak of the super-soft phase, but was not detected in the far ultraviolet (FUV) band of AstroSat. The shape of the phase-folded X-ray light curves has varied significantly as the nova evolved. The phase-resolved spectral studies reveal the likely presence of various absorption features in the soft X-ray band of 0.5-2 keV, and suggest that the optical depth of these absorption features may be marginally dependent on the pulse phase. Strong emission lines from Si, N, and O are detected in the FUV, and their strength declined continuously as the nova evolved and went through a bright X-ray state.

Abstract Copyright: © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): methods: observational - novae, cataclysmic variables - ultraviolet: general - X-rays: binaries

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 NOVA Her 2021 No* 18 57 30.9832440660 +16 53 39.589542422           ~ 79 0

Query : 2024MNRAS.528...28B

Basic data :
NOVA Her 2021 -- Classical Nova
Other object types: otypes_help 		V* (TCP,V*), No* (NOVA), * (Gaia), ev (ZTF)
ICRS coord. (ep=J2000) : 		18 57 30.9832440660 +16 53 39.589542422 (Optical) [ 0.6154 0.8425 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		18 55 16.8550774276 +16 49 35.659362836 [ 0.6154 0.8425 90 ]
Gal coord. (ep=J2000) : 		048.7066223073791 +06.3112290547032 [ 0.6154 0.8425 90 ]
Proper motions mas/yr : 		-4.129 -4.675 [0.705 0.892 90] A 2020yCat.1350....0G
Fluxes (1) :
G 19.949957 [0.020570] C 2022yCat.1355....0G
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Identifiers (5) :
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NOVA Her 2021 V* V1674 Her Gaia DR3 4514092717838547584
TCP J18573095+1653396 ZTF19aasfsjq

References (79 between 1850 and 2026) (Total 79)
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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Distance : 1    PM : 1   

   

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V* V1674 Her Gaia DR3 4514092717838547584

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