The Weakening Outburst of the Young Eruptive Star V582 Aur
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 midinfrared Wide-field Infrared Survey Explorer (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, then 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 yr.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 2019
- DOI:
- arXiv:
- arXiv:1902.03673
- Bibcode:
- 2019ApJ...873..130Z
- Keywords:
-
- circumstellar matter;
- stars: individual: V582 Aur;
- stars: pre-main sequence;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 8 pages, 4 figures, accepted for publication in ApJ