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V899 Mon: an outbursting protostar with a peculiar light curve, and its transition phases

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dc.contributor.author Ninan, J. P
dc.contributor.author Ojha, D. K
dc.contributor.author Baug, T
dc.contributor.author Bhatt, B. C
dc.contributor.author Mohan, V
dc.contributor.author Ghosh, S. K
dc.contributor.author Menshchikov, A
dc.contributor.author Anupama, G. C
dc.contributor.author Tamura, M
dc.contributor.author Henning, Th
dc.date.accessioned 2020-11-17T13:59:24Z
dc.date.available 2020-11-17T13:59:24Z
dc.date.issued 2015-12-10
dc.identifier.citation The Astrophysical Journal, Vol. 815, No. 1, 4 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7094
dc.description Restricted Access © The American Astronomical Society http://dx.doi.org/10.1088/0004-637X/815/1/4 en_US
dc.description.abstract We present a detailed study of V899 Mon (a new member in the FUors/EXors family of young low-mass stars undergoing outburst), based on our long-term monitoring of the source starting from 2009 November to 2015 April. Our optical and near-infrared photometric and spectroscopic monitoring recorded the source transitioning from its first outburst to a short-duration quiescence phase (<1 yr), and then returning to a second outburst. We report here the evolution of the outflows from the inner region of the disk as the accretion rate evolved in various epochs. Our high-resolution (R ~ 37,000) optical spectrum could resolve interesting clumpy structures in the outflow traced by various lines. Change in far-infrared flux was also detected between two outburst epochs. Based on our observations, we constrained various stellar and envelope parameters of V899 Mon, as well as the kinematics of its accretion and outflow. The photometric and spectroscopic properties of this source fall between classical FUors and EXors. Our investigation of V899 Mon hints at instability associated with magnetospheric accretion being the physical cause of the sudden short-duration pause of the outburst in 2011. It is also a good candidate to explain similar short-duration pauses in outbursts of some other FUors/EXors sources. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Protoplanetary disks en_US
dc.subject Stars: early-type en_US
dc.subject Stars: formation en_US
dc.subject Stars: individual (V899 Mon) en_US
dc.subject Stars: variables: T Tauri, Herbig Ae/Be en_US
dc.subject Stars: winds, outflows en_US
dc.title V899 Mon: an outbursting protostar with a peculiar light curve, and its transition phases en_US
dc.type Article en_US


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