| | |
| | |
Stat |
Members: 3643 Articles: 2'488'730 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
Rotational Modulation of M/L Dwarfs due to Magnetic Spot | C. Lane
; G. Hallinan
; R. T. Zavala
; R. F. Butler
; R. P. Boyle
; S. Bourke
; A. Antonova
; J. G. Doyle
; F. J. Vrba
; A. Golden
; | Date: |
7 Sep 2007 | Abstract: | We find periodic I-band variability in two ultracool dwarfs, TVLM 513-46546
and 2MASS J00361617+1821104, on either side of the M/L dwarf boundary. Both of
these targets are short-period radio transients, with the detected I-band
periods matching those found at radio wavelengths (P=1.96 hr for TVLM
513-46546, and P=3 hr for 2MASS J00361617+1821104). We attribute the detected
I-band periodicities to the periods of rotation of the dwarfs, supported by
radius estimates and measured $v$ sin $i$ values for the objects. Based on the
detected period of rotation of TVLM 513-46546 (M9) in the I-band, along with
confirmation of strong magnetic fields from recent radio observations, we argue
for magnetically induced spots as the cause of this periodic variability. The
I-band rotational modulation of L3.5 dwarf 2MASS J00361617+1821104 appeared to
vary in amplitude with time. We conclude that the most likely cause of the
I-band variability for this object is magnetic spots, possibly coupled with
time-evolving features such as dust clouds. | Source: | arXiv, 0709.1045 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |