2026AJ....171..144M

Query : 2026AJ....171..144M

2026AJ....171..144M - Astron. J., 171, 144 (2026/March-0)

Follow-up Observations of Candidate White Dwarf Planets with MIRI.

MULLALLY F., MULLALLY S.E., CRACRAFT M., BIANCO S.N., ALBERT L., DEBES J., HERMES J.J., KILIC M. and REACH W.T.

Abstract (from CDS):

We report on second-epoch imaging of two candidate planet-hosting white dwarf (WD) stars, WD 2105-82 and WD 1202-232. Both stars showed evidence of resolved, planet-mass candidate companions in observations using the MIRI mid-infrared imager on JWST. WD 2105 also showed evidence of an infrared excess consistent with an unresolved 1.4 MJ companion with an orbital separation of <4 au. Our second epoch observations confirm that the source of the excess shares common proper motion with the star. The excess is almost certainly due to a companion planet or debris disk. However, neither of the two resolved sources with projected separations of >1″ in the first epoch of JWST observations show measurable proper motion and are thus likely faint, unresolved background galaxies. We also search for common proper-motion companions out to hundreds of astronomical unit, but find no evidence of widely separated companions.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): White dwarf stars - DA stars - Exoplanet astronomy - Direct imaging - Accretion - Stellar accretion - Astrometric exoplanet detection

Simbad objects: 7

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Number of rows : 7
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 GD 66 WD* 05 20 38.3165748936 +30 48 23.922603900   15.78 15.56     DA4.1 81 1
2 V* RY LMi WD* 09 24 15.2482279632 +35 16 51.401570556   15.72   15.99   DA4 274 0
3 LBQS 1145+0145 WD* 11 48 33.6297189672 +01 28 59.420446860           DB 216 0
4 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 73 0
5 NAME LP 141-14b Pl 18 57 39.3436703328 +53 30 33.301040904           ~ 45 0
6 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 125 0
7 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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