Volume 582, October 2015
|Number of page(s)||4|
|Published online||21 October 2015|
Light curves of the latest FUor: Indication of a close binary⋆
Astronomisches Institut, Ruhr–Universität Bochum,
Universitätsstraße 150, 44801
2 Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, PO Box 67, 1525 Budapest, Hungary
3 Center for Backyard Astrophysics (Antwerp), American Association of Variable Star Observers (AAVSO), Verenigin Voor Sterrenkunde (VVS), Andromeda Observatory, Oude Bleken 12, 2400 Mol, Belgium
4 Instituto de Astronomia, Universidad Católica del Norte, Avenida Angamos 0610, Casilla 1280 Antofagasta, Chile
5 Institute for Astronomy, University of Hawaii, 640 N. Aohoku Place, Hilo, HI 96720, USA
Received: 5 August 2015
Accepted: 5 October 2015
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 λ> 5000 Å 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 (~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 ~0.08 mag in October 2014 to ~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.
Key words: stars: variables: T Tauri, Herbig Ae/Be / binaries: close / stars: individual: 2MASS J06593158-0405277
The light curve Table is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (188.8.131.52) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/582/L12
© ESO, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.