2025RNAAS...9....8C

Query : 2025RNAAS...9....8C

2025RNAAS...9....8C - Research Notes of the AAS, 9, 8 (2025/January-0)

V442 Cen: Is the Accreting White Dwarf Ultra-rapidly Rotating?

CALLAHAN L., SION E.M. and GODON P.

Abstract (from CDS):

As observed with the Hubble Space Telescope, the archival Space Telescope Imaging Spectrograph far-ultraviolet spectrum of the white dwarf (WD) in the dwarf nova V442 Cen reveals no photospheric absorption features from accreted metals, despite its WD accounting for 100% of the UV light in quiescence. We discuss why V442 Cen does not exhibit any metals in its photosphere, including the possibility that its rotational velocity is so rapid that it smears out the absorption lines of accreted metals. In this case, the accreting WD in V442 Cen would be the most rapidly rotating non-magnetic CV WD.

Journal keyword(s): White dwarf stars

Simbad objects: 1

Full paper

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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* V442 Cen	CV*	11 24 51.9051069168	-35 54 36.729015624		14.650	14.474	13.135		~	59	0

Query : 2025RNAAS...9....8C

Basic data :

V* V442 Cen -- Cataclysmic Binary

V* (AN,V*,...), * (UCAC4,WEB,...), CV* (2020MNRAS), SB* (SBC9), CV? (2014MNRAS), X (1eRASS), NIR (2MASS)

11 24 51.9051069168 -35 54 36.729015624 (Optical) [ 0.0292 0.0266 90 ] A 2020yCat.1350....0G

11 22 25.8791017006 -35 38 07.021622299 [ 0.0292 0.0266 90 ]

283.8852909743174 +23.7391005072810 [ 0.0292 0.0266 90 ]

-28.788 2.489 [0.049 0.037 90] A 2020yCat.1350....0G

2.8758 [0.0437] A 2020yCat.1350....0G

B 14.650 [0.90] D 2012yCat.1322....0Z

V 14.474 [0.90] D 2012yCat.1322....0Z

R 13.135 [0.39] E 2012yCat.1322....0Z

G 15.784047 [0.011150] C 2022yCat.1355....0G

J 13.914 [0.024] C 2003yCat.2246....0C

H 13.349 [0.023] C 2003yCat.2246....0C

K 13.062 [0.032] C 2003yCat.2246....0C

g 14.390 [0.90] D 2012yCat.1322....0Z

r 14.354 [0.90] D 2012yCat.1322....0Z

i 14.192 [0.90] D 2012yCat.1322....0Z

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*`SV HV 8364`**	`2MASS J11245191-3554366`	*`V V442 Cen`**	`Gaia DR2 5398867830598349952`
`AN 152.1933`	`SBC9 672`	`WEB 10014`
`CRTS J112451.9-355437`	`TIC 57261312`	`AAVSO 1120-35`
`1eRASS J112451.7-355436`	`UCAC4 271-058438`	`Gaia DR3 5398867830598349952`

References (59 between 1850 and 2026) (Total 59)
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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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

2MASS J11245191-3554366 UCAC4 271-058438 V* V442 Cen Gaia DR3 5398867830598349952 Gaia DR2 5398867830598349952

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