We present low-resolution Keck I/LRIS-ADC spectra spanning from 3200-9000 A ofsix young brown dwarfs in the TW Hya Association and in Upper Sco. The optical spectral typesof 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 imageis binned over large wavelength intervals. This method extends our sensivity to accretion rate downto~10~(-13)M-_⊙yr~(–1)
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机译：我们呈现低分辨率的Keck I / LRIS-ADC Spectra，在TW Hya协会和上部SCO中的3200-9000 A Ofsix年轻棕色矮人。样品范围的光谱类型来自M7.25-M8.75，但是两个具有近1次L-Dwarfs的近红外光谱类型。在我们的样本中有四种棕色矮种，只有当Imporeis Binned ov大时，才能测量亮度波长间隔。该方法将我们的感觉延伸到下降到〜10〜（-13）m-_⊙yr〜（-1）
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