CorMASS+Magellan

• Science objective: IR spectroscopy of Spitzer sources– Least massive brown dwarfs– Proto-brown dwarfs– Brown dwarf companions– Serendipitous discoveries

• Properties of CorMASS• Plans for Magellan

currentSpitzer+HST+Magellan mid-90’s

brown dwarfs

stars

Sun

?

Jupiter

The least massive brown dwarfs

Spitzer+IRAC (3-8 m): Chamaeleon I

Spitzer+IRAC (3-8 m): Chamaeleon I

HST+ACS (IZ)CTIO 4 m (YJHK)

IR Spectroscopy of BD Candidates

CorMASS+Magellan

• CorMASS– Instrument team = John Wilson, Mike Skrutskie (UVa)– Capabilities = 0.8-2.5 m, cross-dispersed, R=300, f/9– Previous telescopes = Palomar 60”, VATT, APO 3.5 m– On Magellan = 0.4x3” slit, SN=10 for K=18 in 1 hour– Ideal for followup of candidate brown dwarfs

CorMASS+Magellan

• CorMASS– Instrument team = John Wilson, Mike Skrutskie (UVa)– Capabilities = 0.8-2.5 m, cross-dispersed, R=300, f/9– Previous telescopes = Palomar 60”, VATT, APO 3.5 m– On Magellan = 0.4x3” slit, SN=10 for K=18 in 1 hour– Ideal for followup of candidate brown dwarfs

• Observing run on Magellan– ~8 nights in February or March 2005– Queue observing for IRAC targets and other CfA proposed

work– Harvard-only run now, but will advertise to partners up

approval