Detalles de publicación

PP 019026

The weakening outburst of the young eruptive star V582 Aur

G. Zsidi (1,2), P. Ábrahám (1), J. A. Acosta-Pulido(3,4), et al [includes N. Castro-Segura(4)]
(1) Konkoly Observatory, Budapest, Hungary (2) Eötvös Loránd University, Budapest, Hungary (3) IAC (4) Astrophysics Department ULL
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 , RC and IC band multiepoch observations and new near-infrared J, H and KS 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 ∼80 years.

 
Aceptado para publicación en ApJ | Enviado el 2019-02-21 | Proyecto P/301806