New Low-Mass Stars and Brown Dwarfs with Disks in the Chamaeleon I Star-Forming Region - AstrophysicsReport as inadecuate




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Abstract: We have used images obtained with the Infrared Array Camera and the MultibandImaging Photometer onboard the Spitzer Space Telescope to search for low-massstars and brown dwarfs with circumstellar disks in the Chamaeleon Istar-forming region. Through optical spectroscopy of sources with red colors inthese data, we have identified seven new disk-bearing members of the cluster.Three of these objects are probably brown dwarfs according to their spectraltypes M8, M8.5, M8-L0. Three of the other new members may have edge-on disksbased on the shapes of their infrared spectral energy distributions. One of thepossible edge-on systems has a steeply rising slope from 4.5 to 24um,indicating that it could be a class I source star+disk+envelope rather than aclass II source star+disk. If so, then it would be one of the least massiveknown class I protostars M5.75, M~0.1 Msun.



Author: K. L. Luhman, A. A. Muench

Source: https://arxiv.org/







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