Episodic high-velocity outflows from V899 Mon: a constraint on the outflow mechanisms

Ninan, J. P. ; Ojha, D. K. ; Philip, N. S. (2016) Episodic high-velocity outflows from V899 Mon: a constraint on the outflow mechanisms The Astrophysical Journal, 825 (1). Article ID 65. ISSN 0004-637X

Full text not available from this repository.

Official URL: http://iopscience.iop.org/article/10.3847/0004-637...

Related URL: http://dx.doi.org/10.3847/0004-637X/825/1/65

Abstract

We report the detection of large variations in the outflow wind velocity from a young eruptive star, V899 Mon, during its ongoing high accretion outburst phase. Such large variations in the outflow velocity (from −722 to −425 km s−1) have never been reported previously in this family of objects. Our continuous monitoring of this source shows that the multi-component, clumpy, and episodic high velocity outflows are stable in the timescale of a few days, and vary over the timescale of a few weeks to months. We detect significant decoupling in the instantaneous outflow strength to accretion rate. From the comparison of various possible outflow mechanisms in magnetospheric accretion of young stellar objects, we conclude magnetically driven polar winds to be the most consistent mechanism for the outflows seen in V899 Mon. The large scale fluctuations in outflow over the short period makes V899 Mon the most ideal source to constrain various magnetohydrodynamics simulations of magnetospheric accretion.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:Protoplanetary Disks; Stars: Early-Type; Stars: Formation; Stars: Individual (V899 Mon); Stars: Variables: T Tauri, Herbig Ae/Be; Stars: Winds Outflows
ID Code:104515
Deposited On:18 May 2017 12:24
Last Modified:18 May 2017 12:24

Repository Staff Only: item control page