Light curves of the latest FUor: Indication of a close binary

Abstract

We monitored the recent FUor 2MASS J06593158-0405277 (V960 Mon) since November 2009 at various observatories and multiple wavelengths. After the outburst by nearly 2.9 mag in $r$ around September 2014 the brightness gently fades until April 2015 by nearly 1 mag in $U$ and 0.5 mag in $z$. Thereafter the brightness at $\lambda >5000\mathring{A}$ was constant until June 2015 while the shortest wavelengths ($U,B$) indicate a new rise, similar to that seen for the FUor V2493 Cyg (HBC722). Our near-infrared (NIR) monitoring between December 2014 and April 2015 shows a smaller outburst amplitude ($\sim$2 mag) and a smaller (0.2 $-$ 0.3 mag) post-outburst brightness decline. Optical and NIR color-magnitude diagrams indicate that the brightness decline is caused by growing extinction. The post-outburst light curves are modulated by an oscillating color-neutral pattern with a period of about 17 days and an amplitude declining from $\sim$0.08 mag in October 2014 to $\sim$0.04 mag in May 2015. The properties of the oscillating pattern lead us to suggest the presence of a close binary with eccentric orbit.

References in corpus (12)

• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• Empirical Color Transformations Between SDSS Photometry and Other Photometric Systems
• Circumbinary disk evolution
• The outburst and nature of two young eruptive stars in the North America/Pelican Nebula Complex
• Flickering in FU Orionis
• Modelling Circumbinary Gas Flows in Close T Tauri Binaries
• The Periodic Spectroscopic Variability of FU Orionis
• The Bochum Survey of the Southern Galactic Disk: II. Follow-up measurements and multi-filter photometry for 1323 square degrees monitored in 2010-2015
• The progenitor of the FUor-type young eruptive star 2MASS J06593158-0405277
• Photometric variability in FU Ori and Z CMa as observed by MOST
• The spectroscopic signature of hot Jupiters in FU Orionis objects
• Investigating 2MASS J06593158-0405277: a FUor burst in a triple system?

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• Massive compact disks around FU Orionis-type young eruptive stars revealed by ALMA
• Young Faithful: The Eruptions of EC 53 as It Cycles through Filling and Draining the Inner Disk
• Brightness variations of the FUor-type eruptive star V346 Nor
• High-resolution spectroscopic monitoring observations of FU Orionis-type object, V960 Mon
• Photometric and spectroscopic study of the EXor-like eruptive young star Gaia19fct
• Modeling the Multiwavelength Evolution of the V960 Mon System
• The most variable VVV sources: eruptive protostars, dipping giants in the Nuclear Disc and others
• Multi-wavelength detection of an ongoing FUOr-type outburst on a low-mass YSO
• Grain growth in newly discovered young eruptive stars
• The Spectroscopic Variations of the FU Orionis Object V960 Mon
• Revealing the spectroscopic variations of FU Orionis object V960 Mon with high-resolution spectroscopy
• The Bochum Survey of the Southern Galactic Disk: III. Complete Data Release