2024ApJ...962L..32M


Query : 2024ApJ...962L..32M

2024ApJ...962L..32M - Astrophys. J., 962, L32 (2024/February-3)

JWST Directly Images Giant Planet Candidates Around Two Metal-polluted White Dwarf Stars.

MULLALLY S.E., DEBES J., CRACRAFT M., MULLALLY F., POULSEN S., ALBERT L., THIBAULT K., REACH W.T., HERMES J.J., BARCLAY T., KILIC M. and QUINTANA E.V.

Abstract (from CDS):

We report the discovery of two directly imaged, giant planet candidates orbiting the metal-rich, hydrogen atmosphere white dwarfs WD 1202-232 and WD 2105-82. JWST's Mid-Infrared Instrument (MIRI) data on these two stars show a nearby resolved source at a projected separation of 11.47 and 34.62 au, respectively. Assuming the planets formed at the same time as their host stars, with total ages of 5.3 and 1.6 Gyr, the MIRI photometry is consistent with giant planets with masses ≈1-7 MJup. The probability of both candidates being false positives due to red background sources is approximately 1 in 3000. If confirmed, these would be the first directly imaged planets that are similar in both age and separation to the giant planets in our own solar system, and they would demonstrate that widely separated giant planets like Jupiter survive stellar evolution. Giant planet perturbers are widely used to explain the tidal disruption of asteroids around metal-polluted white dwarfs. Confirmation of these two planet candidates with future MIRI imaging would provide evidence that directly links giant planets to metal pollution in white dwarf stars.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): DA stars - Exoplanet astronomy - Exoplanet detection methods - James Webb Space Telescope

Simbad objects: 9

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Number of rows : 9
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 WISE J033605.05-014350.4 BD* 03 36 05.24056 -01 43 38.7643           Y0 22 0
2 NAME WD 1202-232 b Pl? 12 05 26.6739103248 -23 33 12.139045488           ~ 1 0
3 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 73 0
4 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
5 MOA 2010-BLG-477b Pl 18 06 07.440 -31 27 16.12           ~ 16 1
6 NAME LP 141-14b Pl 18 57 39.3436703328 +53 30 33.301040904           ~ 45 0
7 NAME WD 2105-82 b Pl? 21 13 16.8549349741 -81 49 12.878285501           ~ 1 0
8 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 125 0
9 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 213 0

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