2015A&A...579L...8X


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:33:49

2015A&A...579L...8X - Astronomy and Astrophysics, volume 579, L8-8 (2015/7-1)

An extreme-AO search for giant planets around a white dwarf. VLT/SPHERE performance on a faint target GD 50.

XU S., ERTEL S., WAHHAJ Z., MILLI J., SCICLUNA P. and BERTRANG G.H.-M.

Abstract (from CDS):

Little is known about the planetary systems around single white dwarfs, although there is strong evidence that they do exist. We performed a pilot study with the extreme-AO system on the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) on the Very Large Telescopes (VLT) to look for giant planets around a young white dwarf, GD 50. We were awarded science verification time on the new ESO instrument SPHERE. Observations were made with the InfraRed Dual-band Imager and Spectrograph in classical imaging mode in H band. Despite the faintness of the target (14.2 mag in R band), the AO loop was closed and a strehl of 37% was reached in H band. No objects were detected around GD 50. We achieved a 5-sigma contrast of 6.2, 8.0, and 8.25 mag at 0.2", 0.4", and 0.6" and beyond, respectively. We exclude any substellar objects more massive than 4.0MJ at 6.2au, 2.9MJ at 12.4au, and 2.8MJ at 18.6au and beyond. This rivals the previous upper limit set by Spitzer. We further show that SPHERE is the most promising instrument available to search for close-in substellar objects around nearby white dwarfs.

Abstract Copyright:

Journal keyword(s): planets and satellites: detection - white dwarfs

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2979 0
2 GD 50 WD* 03 48 50.1861716368 -00 58 32.290158840 12.596 13.787 14.063 14.210 14.388 DA1.2 234 0
3 GD 66 WD* 05 20 38.3165475543 +30 48 23.923341864   15.78 15.56     DA4.1 68 1
4 L 97-3 WD* 08 06 53.7535932824 -66 18 16.702835977   13.76 13.70 13.66 13.61 DQ 74 1
5 L 97-3 B BD* 08 07 14.675 -66 18 48.68           Y1 53 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:33:49

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