On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus

Details On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110322g&link_type=abstract

American Astronomical Society, AAS Meeting #211, #103.22; Bulletin of the American Astronomical Society, Vol. 39, p.923

Astronomy and Astrophysics

Astronomy

Scientific paper

There is now ample evidence that like their more massive counterparts, Taurus brown dwarfs (BD) experience a TTS phase. This shows as broad asymmetric Halpha emission profiles characteristic of accretion. L band excesses have been detected in Taurus substellar sources, indicating a disk frequency 50%.
It has often been argued that the presence of accretion / outflow activity in BDs would be evidence that brown dwarfs form like stars (i.e. are not ejected). However, even truncated disks in ejected objects can survive for a few Myr, a period consistent with Taurus age.
There is a priori no contradiction between brown dwarf ejection and presence of (presumably small) accretion disks at a few Myr age.
In this poster, we present a study of disks around two dozens Taurus BDs.
We have combined optical (Guieu et. al. 2006), JHK 2MASS, recent Taurus Spitzer legacy IRAC (3.6, 4.5, 5.8 & 8.0 µm) and MIPS (24 and 70 µm) data (PI D. Padgett) to draw the full SEDs of 23 of the 33 currently known BDs in the Taurus cloud, from the visible to the far infrared.
In each object, we infer the presence of a disk from the comparison of the SED to a BD photosphere model (Allard et all 2000). BDs with infrared excess are fitted with a disk model (Pinte et. al 2006) and inner disk parameters are derived.
We investigate the fraction of disk around brown dwarf which appear to change among Taurus filament.

Affiliated with

Also associated with

No associations

Rating

On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus 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 On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On The Circum(sub)stellar Environment Of Brown Dwarfs In Taurus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1480631