Masing and nonmasing silicon monoxide emission from evolved stars

Details Masing and nonmasing silicon monoxide emission from evolved stars Masing and nonmasing silicon monoxide emission from evolved stars

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257..161w&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 1, 1982, p. 161-170.

Astronomy and Astrophysics

Astrophysics

15

Emission Spectra, Late Stars, Masers, Silicon Oxides, Stellar Envelopes, Stellar Evolution, Infrared Spectra, Spectral Energy Distribution, Spectral Line Width, Stellar Spectrophotometry, Variable Stars, Vibrational Spectra

Scientific paper

Observations of the J = 3-2 and J = 2-1 rotational transitions in the ground (nu = 0) and first vibrational (nu = 1) states of SiO toward six evolved stars are reported. Comparisons of the line widths of the two ground state rotational transitions indicate that the thermal emission regions are not coextensive in all stars, with the J = 3-2 line exhibiting a greater velocity dispersion. The J = (3-2)/(2-1) (nu = 0) line intensity ratio is also found to vary from star to star, and there is a general tendency of both line width and integrated intensity to increase with infrared color excess. The masing (nu = 1) J = 3-2 and J = 2-1 transitions show marked variability in both line shape and intensity. Repeated observations of the J = 2-1 (nu = 1) transition indicate that the integrated line intensities vary in phase with the IR fluxes of the periodically variable stars. A search for emission in the J = 2-1 line of the (nu = 2) excited state yielded negative results in all cases.

Affiliated with

Also associated with

No associations

Rating

Masing and nonmasing silicon monoxide emission from evolved stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Masing and nonmasing silicon monoxide emission from evolved stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Masing and nonmasing silicon monoxide emission from evolved stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1351546