Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...289l..19f&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 289, Feb. 15, 1985, p. L19-L23.
Astronomy and Astrophysics
Astronomy
58
Ophiuchi Clouds, Pre-Main Sequence Stars, Radio Astronomy, Radio Stars, Stellar Flares, Synchrotron Radiation, Early Stars, H Alpha Line, Variable Stars, Very Large Array (Vla)
Scientific paper
During a multi-epoch radio continuum survey of the rho Ophiuchi star formation cloud performed with the Very Large Array, rapid radio variability was seen in the young star DoAr 21. Typically present at levels of 2-5 mJy, it rose up to 48 mJy at 5 GHz on time scales of hours on 1983 February 18, during which the spectrum was steeply inverted. Interpretation in terms of mass loss, which is usually invoked to explain T Tauri star radio emission, encounters difficulties. (Gyro)synchrotron radiation from energetic electrons in a magnetic loop several times larger than the star provides a better model. The event is very similar to the largest radio flares seen on RS CVn stars. This is the first report of such a microwave flare on a pre-main-sequence star and adds to the growing body of evidence that young stars exhibit very high levels of magnetically induced surface activity.
Feigelson Eric D.
Montmerle Th.
No associations
LandOfFree
An extremely variable radio star in the rho Ophiuchi cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An extremely variable radio star in the rho Ophiuchi cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An extremely variable radio star in the rho Ophiuchi cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1591258