TY - JOUR
T1 - Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through Far-ultraviolet Observations
AU - Macgregor, Meredith A.
AU - Weinberger, Alycia J.
AU - Loyd, R. O.Parke
AU - Shkolnik, Evgenya
AU - Barclay, Thomas
AU - Howard, Ward S.
AU - Zic, Andrew
AU - Osten, Rachel A.
AU - Cranmer, Steven R.
AU - Kowalski, Adam F.
AU - Lenc, Emil
AU - Youngblood, Allison
AU - Estes, Anna
AU - Wilner, David J.
AU - Forbrich, Jan
AU - Hughes, Anna
AU - Law, Nicholas M.
AU - Murphy, Tara
AU - Boley, Aaron
AU - Matthews, Jaymie
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved..
PY - 2021/4/1
Y1 - 2021/4/1
N2 - We present the discovery of an extreme flaring event from Proxima Cen by the Australian Square Kilometre Array Pathfinder (ASKAP), Atacama Large Millimeter/submillimeter Array (ALMA), Hubble Space Telescope (HST), Transiting Exoplanet Survey Satellite (TESS), and the du Pont Telescope that occurred on 2019 May 1. In the millimeter and FUV, this flare is the brightest ever detected, brightening by a factor of >1000 and >14,000 as seen by ALMA and HST, respectively. The millimeter and FUV continuum emission trace each other closely during the flare, suggesting that millimeter emission could serve as a proxy for FUV emission from stellar flares and become a powerful new tool to constrain the high-energy radiation environment of exoplanets. Surprisingly, optical emission associated with the event peaks at a much lower level with a time delay. The initial burst has an extremely short duration, lasting for <10 s. Taken together with the growing sample of millimeter M dwarf flares, this event suggests that millimeter emission is actually common during stellar flares and often originates from short burst-like events.
AB - We present the discovery of an extreme flaring event from Proxima Cen by the Australian Square Kilometre Array Pathfinder (ASKAP), Atacama Large Millimeter/submillimeter Array (ALMA), Hubble Space Telescope (HST), Transiting Exoplanet Survey Satellite (TESS), and the du Pont Telescope that occurred on 2019 May 1. In the millimeter and FUV, this flare is the brightest ever detected, brightening by a factor of >1000 and >14,000 as seen by ALMA and HST, respectively. The millimeter and FUV continuum emission trace each other closely during the flare, suggesting that millimeter emission could serve as a proxy for FUV emission from stellar flares and become a powerful new tool to constrain the high-energy radiation environment of exoplanets. Surprisingly, optical emission associated with the event peaks at a much lower level with a time delay. The initial burst has an extremely short duration, lasting for <10 s. Taken together with the growing sample of millimeter M dwarf flares, this event suggests that millimeter emission is actually common during stellar flares and often originates from short burst-like events.
UR - http://www.scopus.com/inward/record.url?scp=85105083028&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85105083028&partnerID=8YFLogxK
U2 - 10.3847/2041-8213/abf14c
DO - 10.3847/2041-8213/abf14c
M3 - Article
AN - SCOPUS:85105083028
SN - 2041-8205
VL - 911
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L25
ER -