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X-Raying the Beating Heart of a Newborn Star: Rotational Modulation of High-Energy Radiation from V1647 OriWe report a periodicity of approx.1 day in the highly elevated X-ray emission from the protostar V1647 Ori during its two recent multiple-year outbursts of mass accretion. This periodicity is indicative of protostellar rotation at near-breakup speed. Modeling of the phased X-ray light curve indicates the high-temperature ( 50 MK), X-ray-emitting plasma, which is most likely heated by accretion-induced magnetic reconnection, resides in dense ( 5 1010 cm.3), pancake-shaped magnetic footprints where the accretion stream feeds the newborn star. The sustained X-ray periodicity of V1647 Ori demonstrates that such protostellar magnetospheric accretion configurations can be stable over timescales of years. Subject headings: stars: formation stars: individual (V1647 Ori) stars: pre-main sequence X-rays: stars
Document ID
20130011908
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Hamaguchi, Kenji (Maryland Univ. Baltimore County Baltimore, MD, United States)
Grosso, Nicolas (Strasbourg Univ. France)
Kastner, Joel H. (Rochester Inst. of Tech. Rochester, NY, United States)
Weintraub, David A. (Vanderbilt Univ. Nashville, TN, United States)
Richmond, Michael (Rochester Inst. of Tech. Rochester, NY, United States)
Petre, Robert (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Teets, William K. (Vanderbilt Univ. Nashville, TN, United States)
Principe, David (Rochester Inst. of Tech. Rochester, NY, United States)
Date Acquired
August 27, 2013
Publication Date
July 3, 2012
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN6672
Funding Number(s)
CONTRACT_GRANT: NNX09AC11G
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Public Use Permitted.

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