Near-Ir Photometric and Optical Spectroscopic Study of the Fu Orionis Object V582 Aurigae

Abstract

We carried out near-IR photometric and optical spectroscopic observations of V582 Aur, which is a FU Orionis type object, to investigate any periodic and/or aperiodic variations. We obtained light curves on the scale of a night and a year, in J, H and Ks bands with KASINICS (KASI Near Infrared Camera System) attached to the BOAO (Bohyun-san Optical Astronomy Observatory) 1.8-m reflector in Youngcheon, South Korea and examined photometric variations on the two time scales. So far we have not found any periodic brightness variations on the scale of a night. On the other hand, we have found that there seems to be a periodic brightness variation with a period of approximately 45 days. In addition, high-resolution optical spectroscopic observations of V582 Aur were performed from February 2013 to May 2014 with the high-resolution echelle spectrograph BOES attached to the BOAO 1.8-m reflector. We analyzed several spectral lines to understand the physical state of V582 Aur. The P Cyg profiles are clearly shown in the Hα line and Na I D line.

An UXor among FUors: Extinction-related Brightness Variations of the Young Eruptive Star V582 Aur

“…Adopting a foreground interstellar extinction of A V =1.53 mag in this direction, Kun et al (2017) derived a bolometric luminosity of 150-320 L ⊙ for V582 Aur, a typical value for FU Orionis objects. The flux evolution of the outburst until 2013, including a deep minimum in 2012, was presented by Semkov et al (2013), while optical and near-infrared photometric and spectroscopic measurements on parts of the subsequent evolution were monitored and published by different authors (Oh et al 2015;Semkov et al 2017). In this work we will analyse new observations of V582 Aur obtained between 2010 and 2017, supplemented by data extracted from archival photographic plates.…”