A Pilot Imaging Line Survey of RW LMi and IK Tau Using the Expanded Very Large Array
Artikel i vetenskaplig tidskrift, 2011

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.

Författare

M. J. Claussen

National Radio Astronomy Observatory Socorro

Loránt Olivér Sjouwerman

National Radio Astronomy Observatory Socorro

M. P. Rupen

National Radio Astronomy Observatory Socorro

Hans Olofsson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Fredrik Schöier

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Per Bergman

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

G. R. Knapp

Princeton University

Astrophysical Journal Letters

2041-8205 (ISSN) 2041-8213 (eISSN)

Vol. 739 1 L5-

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.1088/2041-8205/739/1/L5

Mer information

Skapat

2017-10-08