PI: Gregory Herczeg, KIAA, Peking University, firstname.lastname@example.org
Address: Yu He Yuan Lu 5, Haidian Qu, Beijing, 100871 China
CoI: Zhen Guo, KIAA, Peking University
CoI: Brendan P Bowler, U. of Texas, Austin
CoI: Adam Kraus, U. of Texas, Austin
CoI: Sean Andrews, Harvard-Smithsonian Center for Astrophysics
CoI: Zhaohuan Zhu, Princeton U.
CoI: Michael Ireland, Australian National U.
CoI: Lynne Hillenbrand, California Institute of Technology
Title: Accretion and the formation of very low mass objects
Abstract: The formation of planetary mass objects at 50-300 AU separations from their host stars is uncertain. Several campaigns are exploiting the low contrast between the star and an accreting planet in a narrow region around H-alpha to find and characterize these systems. However, interpreting the H-alpha emission in terms of accretion rates and therefore formation relies on highly uncertain conversion factors and comparisons to field objects of the same mass. In this proposal, we request GMOS-N blue+red spectra of very low mass brown dwarfs and free-floating planets (10-30 MJ) to establish a control group for accretion rates of free floating objects for comparison to planetary mass companions, to test whether a break exists in object mass-accretion rate correlations, and to quantify conversions required to interpreting line emission from high contrast imaging.
Program Type: Standard/Galactic
Run 1 (2016B): GEM-NQ/GMOSN -- 21.4hrs band 1 (GN-2016B-Q-10)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360