Spitzer Space Telescope - Directors Discretionary Time Proposal #266


Young Stars in IC 2118

Principal Investigator: Tim Spuck
           Institution: Oil City Area Sr. High School

Co-Investigators: 
Babs Sepulveda, Lincoln High School                                   
Tony Maranto, Phillips Exeter Academy                                 
Cynthia Weehler, Luther Burbank High School                           
Theresa Roelofsen, Bassick High School                                
Luisa Rebull, Spitzer Science Center                                  

Science Category: Star Formation 
 Observing Modes: IracMap 
  Hours Approved: 11.6 

Abstract:
IC 2118, the Witch Head Nebula (~210  parsecs), is a region of star
formation located near the supergiant star Rigel in the constellation
Orion.  Last year, we observed the head of the nebula and
approximately QUADRUPLED the number of young stars known here.  We
propose using IRAC and MIPS to continue our investigation by observing
the densest part of the rest of the cloud.  Our team proposes to use
IRAC and MIPS observations to (1) investigate star formation, (2) look
for likely cluster member stars with infrared excesses, and
characterize this young star population by obtaining their colors and
therefore estimates of masses and ages, (3) study the distribution of
stars, their relationship to the ISM, and the possibilities of
triggered star formation, (4) compare the young star population,
distribution, and age to other similar sites of star formation, e.g.,
IC 1396 and (5) produce a dramatic image of the interstellar medium in
the region surrounding IC 2118.  Since this region is in the Orion
constellation near the bright star Rigel, it provides additional
appeal to students and the general public.