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arXiv · 1902.03673

The weakening outburst of the young eruptive star V582 Aur

G. Zsidi·P. Ábrahám·J. A. Acosta-Pulido·Á. Kóspál·M. Kun·Zs. M. Szabó·A. Bódi·B. Cseh·N. Castro Segura·O. Hanyecz·B. Ignácz·Cs. Kalup·L. Kriskovics·L. Mészáros·A. Ordasi·A. Pál·K. Sárneczky·B. Seli·Á. Sódor·R. Szakáts
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Abstract

V582 Aur is a pre-main sequence FU Orionis type eruptive star, which entered a brightness minimum in 2016 March due to changes in the line-of-sight extinction. Here, we present and analyze new optical $B$, $V$, $R_C$ and $I_C$ band multiepoch observations and new near-infrared $J$, $H$ and $K_S$ band photometric measurements from 2018 January$-$2019 February, as well as publicly available mid-infrared WISE data. We found that the source shows a significant optical$-$near-infrared variability, and the current brightness minimum has not completely finished yet. If the present dimming originates from the same orbiting dust clump that caused a similar brightness variation in 2012, than our results suggest a viscous spreading of the dust particles along the orbit. Another scenario is that the current minimum is caused by a dust structure, that is entering and leaving the inner part of the system. The WISE measurements could be consistent with this scenario. Our long-term data, as well as an accretion disk modeling hint at a general fading of V582 Aur, suggesting that the source will reach the quiescent level in $\sim$80 years.

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G. Zsidi, P. Ábrahám, J. A. Acosta-Pulido, Á. Kóspál, M. Kun, Zs. M. Szabó, A. Bódi, B. Cseh, N. Castro Segura, O. Hanyecz, B. Ignácz, Cs. Kalup, L. Kriskovics, L. Mészáros, A. Ordasi, A. Pál, K. Sárneczky, B. Seli, Á. Sódor, R. Szakáts. 2019-02-10. The weakening outburst of the young eruptive star V582 Aur. https://doi.org/10.3847/1538-4357/ab05c9

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