2023MNRAS.525.1814M

Query : 2023MNRAS.525.1814M

2023MNRAS.525.1814M - Mon. Not. R. Astron. Soc., 525, 1814-1823 (2023/October-3)

An eclipsing 47 min double white dwarf binary at 400 pc.

MUNDAY J., TREMBLAY P.-E., HERMES J.J., BARLOW B., PELISOLI I., MARSH T.R., PARSONS S.G., JONES D., KEPLER S.O., BROWN A., LITTLEFAIR S.P., HEGEDUS R., BARAN A., BREEDT E., DHILLON V.S., DYER M.J., GREEN M.J., KENNEDY M.R., KERRY P., LOPEZ I.D., ROMERO A.D., SAHMAN D. and WORTERS H.L.

Abstract (from CDS):

We present the discovery of the eclipsing double white dwarf (WD) binary WDJ 022558.21-692025.38 that has an orbital period of 47.19 min. Following identification with the Transiting Exoplanet Survey Satellite, we obtained time series ground based spectroscopy and high-speed multiband ULTRACAM photometry which indicate a primary DA WD of mass $0.40\pm 0.04\, \text{M}_\odot$ and a $0.28\pm 0.02\, \text{M}_\odot$ mass secondary WD, which is likely of type DA as well. The system becomes the third-closest eclipsing double WD binary discovered with a distance of approximately 400 pc and will be a detectable source for upcoming gravitational wave detectors in the mHz frequency range. Its orbital decay will be measurable photometrically within 10 yr to a precision of better than 1 per cent. The fate of the binary is to merge in approximately 41 Myr, likely forming a single, more massive WD.

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

Journal keyword(s): gravitational waves - binaries: close - stars: individual: WDJ 022558.21-692025.38 - white dwarfs

Simbad objects: 12

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Number of rows : 12
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 EC 02251-6933 WD* 02 25 58.2148390176 -69 20 25.376648460 15.45 16.24 16.23     DA 9 0
2 Gaia DR3 4693540643322249216 * 02 26 04.1322742693 -69 21 43.423270817           ~ 2 0
3 GALEX J033815.9-813930 WD* 03 38 16.0969772928 -81 39 30.056485068           DA 11 0
4 LP 413-40 WD* 03 45 16.8306937296 +17 48 08.702047980   17.1   16.3   DA 77 0
5 SDSS J063449.92+380352.2 WD* 06 34 49.9364443272 +38 03 52.451014176           DA 15 0
6 PSO J110.5895-18.6584 WD* 07 22 21.4860861456 -18 39 30.575321532           DA 19 0
7 GALEX J100559.1+224932 WD* 10 05 59.1154061304 +22 49 32.311886664           DA+DA 59 0
8 GALEX J115219.9+024814 WD* 11 52 19.9982073768 +02 48 14.425695216           DA+D 26 0
9 GALEX J171708.5+675712 WD* 17 17 08.8568396016 +67 57 11.379229200   13.54 13.73 13.77   DAZ 32 0
10 PSO J267.4803+09.4090 WD* 17 49 55.3013647008 +09 24 32.498785764           DA 14 0
11 GALEX J202922.3+153430 WD* 20 29 22.3078232880 +15 34 31.028467656           DA 14 0
12 PB 5353 WD* 23 22 30.1904191272 +05 09 42.169061880   18.5       DA+DC 16 0

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