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Expected FU Ori Outburst Amplitudes from the Optical to the Mid-infrared

Hillenbrand, Lynne A. and Rodriguez, Antonio C. (2022) Expected FU Ori Outburst Amplitudes from the Optical to the Mid-infrared. Research Notes of the American Astronomical Society, 6 (1). Art. No. 6. ISSN 2515-5172. doi:10.3847/2515-5172/ac4807.

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Disks around young stellar objects (YSOs) consist of material that thermally emits the energy provided by a combination of passive heating from the central star, and active, viscous heating due to mass accretion. FU Ori stars are YSOs with substantially enhanced accretion rates in their inner disk regions. As a disk transitions from standard low-state, to FU Ori-like high-state accretion, the outburst manifests through photometric brightening over a broad range of wavelengths. We present results for the expected amplitudes of the brightening between ∼4000 Å and 8 μm—the wavelength range where FU Ori type outburst events are most commonly detected. Our model consists of an optically thick passive + active steady-state accretion disk with low and high accretion states.

Item Type:Article
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Additional Information:© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received December 2021; Accepted January 2022; Published January 2022. We thank Lee Hartmann and Will Fischer for giving this short contribution a once-over.
Group:Astronomy Department
Subject Keywords:FU Orionis stars; Young stellar objects; Circumstellar disks; Protoplanetary disks
Issue or Number:1
Record Number:CaltechAUTHORS:20220119-234007101
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Official Citation:Lynne A. Hillenbrand and Antonio C. Rodriguez 2022 Res. Notes AAS 6 6
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113011
Deposited By: George Porter
Deposited On:20 Jan 2022 17:41
Last Modified:28 Jan 2022 17:37

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