Query : 2018A&A...610L..12D

2018A&A...610L..12D - Astronomy and Astrophysics, volume 610, L12-12 (2018/2-1)

Non-grey dimming events of KIC 8462852 from GTC spectrophotometry.


Abstract (from CDS):

We report ground-based spectrophotometry of KIC 8462852 obtained during its first dimming events since the end of the Kepler mission. The dimmings show a clear colour signature and are deeper in visual blue than in red wavelengths. The wavelength dependency of the flux loss can be described with an absorption Angstrom coefficient of 2.19±0.45, which is compatible with absorption by optically thin dust with particle sizes of the order of 0.0015 to 0.15µm. These particles would be smaller than is required to be resistant against blow-out by radiation pressure when close to the star. During occultation events, these particles must be replenished from a comoving body on time-scales of days. If dust is indeed the source of the dimming events of KIC 8462852, deeper dimming events should show more neutral colours, as is expected from optically thick absorbers.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: individual: KIC 8462852 - stars: peculiar - opacity - interplanetary medium

VizieR on-line data: <Available at CDS (J/A+A/610/L12): table1.dat timep01.dat–timep16.dat sp_target/* sp_compar/*>

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 TYC 3162-977-1 * 20 06 07.7412190944 +44 26 03.685638984   13.03 11.86     ~ 6 0
2 GSC 03162-00665 Er* 20 06 15.4526521026 +44 27 24.790869158   12.82 12.01 11.75   F3V 140 0

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