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- W3099579102 abstract "We present an analysis of the results of long-term multi-band photometric monitoring of the enigmatic star, KIC 8462852. Observations in the $B$, $g'$, $V$, $r'$ and $I_C$ passbands have been acquired at University College London Observatory (UCLO) between May 2017 and September 2018. We interrogate the wavelength dependence of the $sim$month-long dimming and brightening exhibited by the target star over an 85-day interval, immediately following a days-long $sim5$ per cent drop in brightness on Julian Date (JD) 2458203. Between JD 2458215--300 we measure brightness variations which correspond to relative extinctions of $A_B/A_V = 1.39pm0.27$, $A_{g'}/A_V = 1.16pm0.11$, $A_{r'}/A_V = 0.80pm0.25$ and $A_{Ic}/A_V = 0.49pm0.19$, from which we infer an Angstrom absorption coefficient of $1.33pm0.43$ ($R_V simeq 3.2^{+2.6}_{-1.0}$). As with the days-long `dips', the wavelength dependence of the longer-term brightness variations must also be associated with extinction arising from a dust distribution containing a substantial fraction of sub-micron-sized grains. This implies some common mechanism is responsible for the star's variability over both these short and longer timescales." @default.
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- W3099579102 date "2019-07-16" @default.
- W3099579102 modified "2023-09-29" @default.
- W3099579102 title "Non-gray, Month-long Brightening of KIC 8462852 in the Immediate Aftermath of a Deep Dip" @default.
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- W3099579102 doi "https://doi.org/10.1088/1538-3873/ab254f" @default.
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