SIMBAD references

2010ApJ...722L..28E - Astrophys. J., 722, L28-L32 (2010/October-2)

Time-variable accretion in the TW Hya star/disk system.

EISNER J.A., DOPPMANN G.W., NAJITA J.R., McCARTHY D., KULESA C., SWIFT B.J. and TESKE J.

Abstract (from CDS):

We present two epochs of observations of TW Hya from the high-dispersion near-IR spectrograph ARIES at the Multiple Mirror Telescope. We detect strong emission from the Brγ transition of hydrogen, indicating an accretion rate substantially larger than previously estimated, using hydrogen line emission. The Brγ line strength varies across our two observed epochs. We also measure circumstellar-to-stellar flux ratios (i.e., veilings) that appear close to zero in both epochs. These findings suggest that TW Hya experiences episodes of enhanced accretion while the inner disk remains largely devoid of dust. We discuss several physical mechanisms that may explain these observations.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: TW Hya - stars: pre-main sequence - techniques: spectroscopic

Simbad objects: 4

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2010ApJ...722L..28E and select 'bookmark this link' or equivalent in the popup menu