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A Pilot Imaging Lin...
A Pilot Imaging Line Survey of RW LMi and IK Tau Using the Expanded Very Large Array
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- Claussen, M. J. (författare)
- National Radio Astronomy Observatory Socorro
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- Sjouwerman, Loránt Olivér, 1966 (författare)
- National Radio Astronomy Observatory Socorro
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- Rupen, M. P. (författare)
- National Radio Astronomy Observatory Socorro
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- Olofsson, Hans, 1952 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Schöier, Fredrik, 1969 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bergman, Per, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Knapp, G. R. (författare)
- Princeton University
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: Astrophysical Journal Letters. - 2041-8213 .- 2041-8205. ; 739:1, s. L5-
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
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- We report on a pilot imaging line survey (36.0-37.0 GHz, with ~1 km s–1 spectral channels) with the Expanded Very Large Array for two asymptotic giant branch stars, RW LMi (= CIT6, which has a carbon-rich circumstellar envelope, CSE) and IK Tau (=NML Tau, with an oxygen-rich CSE). Radio continuum emission consistent with photospheric emission was detected from both stars. From RW LMi we imaged the HC3N (J = 4→3) emission. The images show several partial rings of emission; these multiple shells trace the evolution of the CSE from 400 to 1200 years. SiS (J = 2→1) emission was detected from both RW LMi and IK Tau. For both stars the SiS emission is centrally condensed with the peak line emission coincident with the stellar radio continuum emission. In addition, we have detected weak HC7N (J = 32→31) emission from RW LMi.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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