Measuring tiny mass accretion rates onto young brown dwarfs

Details Measuring tiny mass accretion rates onto young brown dwarfs Measuring tiny mass accretion rates onto young brown dwarfs

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..529h&link_type=abstract

COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.

Physics

Low Luminosity Stars, Subdwarfs, And Brown Dwarfs, Infall, Accretion, And Accretion Disks, Celestial Mechanics

Scientific paper

We present low-resolution Keck I/LRIS-ADC spectra spanning from 3200-9000 Å of six young brown dwarfs in the TW Hya Association and in Upper Sco. The optical spectral types of the sample range from M7.25-M8.75, though two have near-IR spectral types of early L-dwarfs. For four brown dwarfs in our sample, the accretion luminosity is measurable only when the image is binned over large wavelength intervals. This method extends our sensivity to accretion rate down to ~10-13 Msolar yr-1 for brown dwarfs.

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