2022RNAAS...6...49G

Query : 2022RNAAS...6...49G

2022RNAAS...6...49G - Research Notes of the AAS, 6, 49 (2022/March-0)

Quasi-periodic Dimming of the ∼130 Myr-old Debris-Disk Hosting Star HD 240779 is not Persistent.

GAIDOS E.

Abstract (from CDS):

Quasi-periodic (1.5 days) dimming (by circumstellar dust) of the 135 Myr-old AB Doradus moving group member HD 240779 was detected in photometry by TESS in late 2018. Similar observations two years later show no such signal, and ground-based photometry indicate that the signal was absent in late 2019. This suggests that the source of the dust did not survive long after 2018, e.g., it was a disrupted planetesimal, or that dust production by the body is episodic, analogous to the “evaporating” planets detected by Kepler.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Planetesimals - Debris disks - Young stellar objects - Circumstellar dust

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 - 2026 		#notes
1 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
2 BD+10 714B PM* 05 06 55.3188023088 +10 59 48.788713068   11.73 10.80     ~ 5 0
3 HD 240779 PM* 05 06 55.4896989864 +10 59 53.060739252   10.53 9.88     G5 12 0
4 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1080 0
5 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0

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