The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Spitzer and Herschel observations of protostellar outflows in L1251B

  • Choi, Yunhee (Kyung Hee University) ;
  • Lee, Jeong-Eun (Kyung Hee University) ;
  • Green, Joel D. (Space Telescope Science Institute) ;
  • Maret, Sebastien (Institut de Planetologie et d'Astrophysique de Grenoble) ;
  • Yang, Yau-Lun (University of Texas at Austin) ;
  • Bergin, Edwin A. (University of Michigan) ;
  • Blake, Geoffrey A. (California Institute of Technology) ;
  • Boogert, Abraham. C.A. (NASA Ames Research Center) ;
  • Di Francesco, James (National Research Council) ;
  • Evans, Neal J. II (University of Texas at Austin) ;
  • Pontoppidan, Klaus M. (Space Telescope Science Institute) ;
  • Sargent, Annelia I. (California Institute of Technology)
  • Published : 2017.10.10
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Abstract

L1251B is an excellent example of a small group of pre- and protostellar objects in low-mass star-forming region. Previous interferometer data with a high angular resolution resolved the outflows associated with L1251B into a few components. To understand the physical conditions of the protostellar outflows in L1251B, we mapped this region spectroscopically with Spitzer/IRS and obtained spectral line data from Herschel/PACS. Spitzer/IRS provides the S(0)-S(7) pure rotational lines of H2 as well as fine-structure emissions produced in shocks such as S, [Si II], and [Fe II] and it is a powerful tool for studying shocked interstellar gas. In addition, [O I] lines observed with Herschel/PACS are described well by J-type shock models expected in the outflows from protostars. We will present an analysis of the L1251B protostellar outflow in the H2 pure rotational lines and fine-structure emissions.

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