NDLI: The Multiple Continuum Components in the White-Light Flare of 16 January 2009 on the dM4.5e Star YZ CMi

Content Provider	Springer Nature Link
Author	Kowalski, A. F. Hawley, S. L. Holtzman, J. A. Wisniewski, J. P. Hilton, E. J.
Copyright Year	2011
Abstract	The white light during M dwarf flares has long been known to exhibit the broadband shape of a T≈10 000 K blackbody, and the white light in solar-flares is thought to arise primarily from hydrogen recombination. Yet, a current lack of broad-wavelength coverage solar flare spectra in the optical/near-UV region prohibits a direct comparison of the continuum properties to determine if they are indeed so different. New spectroscopic observations of a secondary flare during the decay of a megaflare on the dM4.5e star YZ CMi have revealed multiple components in the white-light continuum of stellar flares, including both a blackbody-like spectrum and a hydrogen-recombination spectrum. One of the most surprising findings is that these two components are anti-correlated in their temporal evolution. We combine initial phenomenological modeling of the continuum components with spectra from radiative hydrodynamic models to show that continuum veiling causes the measured anti-correlation. This modeling allows us to use the components’ inferred properties to predict how a similar spatially resolved, multiple-component, white-light continuum might appear using analogies to several solar-flare phenomena. We also compare the properties of the optical stellar flare white light to Ellerman bombs on the Sun.
Starting Page	21
Ending Page	29
Page Count	9
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	277
Issue Number	1
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-10-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	White-light flares Solar-stellar connection Radiative transfer Ellerman bombs Extraterrestrial Physics, Space Sciences Meteorology/Climatology Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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The Multiple Continuum Components in the White Light Flare of 16 January 2009 on the dM4.5e Star YZ CMi

A White Light Megaflare on the dM4.5e Star YZ CMi

Imaging Spectroscopy of a White-Light Solar Flare

New Insights into White-Light Flare Emission from Radiative-Hydrodynamic Modeling of a Chromospheric Condensation

A Revisit of the Masuda Flare

Microwave radio emission from the red dwarf star YZ CMi

A Survey of the Hard X-Ray Characteristics of Seismically Active and Quiet White-Light Flares

Flares of YZ CMi

Evidence of a White-Light Flare on 10 September 1886

The Multiple Continuum Components in the White-Light Flare of 16 January 2009 on the dM4.5e Star YZ CMi

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The Multiple Continuum Components in the White-Light Flare of 16 January 2009 on the dM4.5e Star YZ CMi