Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 308589.0, MPI für Astronomie / Publikationen_mpia
Multiband photometric detection of a huge flare on the M9 dwarf 2MASSW J1707183+643933
Authors:Rockenfeller, B.; Bailer-Jones, C. A. L.; Mundt, R.; Ibrahimov, M. A.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:Monthly Notices of the Royal Astronomical Society
Volume:367
Start Page:407
End Page:411
Audience:Not Specified
Abstract / Description:We present simultaneous UV, G, R and I monitoring of 19 M dwarfs that reveal a huge flare on the M9 dwarf with an amplitude in the UV of at least 6 mag. This is one of the strongest detections ever of an optical flare in an M star and one of the first in an ultracool dwarf (spectral types later than about M7). Four intermediate-strength flares (DeltamUV < 4mag) were found in this and three other targets. For the whole sample we deduce a flare probability of 0.013 (rate of 0.022h-1), and 0.049 (0.090h-1) for 2M1707+64 alone. Deviations of the flare emission from a blackbody is consistent with strong Halpha line emission. We also confirm our previously found rotation period for 2M1707+64 and determine it more precisely to be 3.619 +/- 0.015h.
Free Keywords:methods: data analysis-techniques: photometric-stars: activity-stars: flare-stars: late-type-stars: rotation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi...
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.