ScholarLens Back to search
1976•Symposium - International Astronomical UnionOpen access

Ultraviolet Si IV/C IV Ratios for Be Stars

K. G. Henize, James D. Wray, S. B. Parsons, George F. Benedict

Open full text 2 citations

Abstract

The intensities of the very strong lines of C IV λ 1549 Å and Si IV λλ 1394, 1403 Å observed in spectra obtained with Skylab experiment S019 provide a sensitive discrimination of spectral type between B0 and B2. Eye estimates of the Si IV/C IV ratio are tabulated for 33 B0-B2, class III-V stars of which 11 are emission-line stars. Seven of the emission-line stars show significantly smaller ratios than normal stars of the same MK class. The most outstanding examples are 60 Cyg, o Pup, η Cen, and Ara.

Open-access reader

About this research paper

What this paper is about

The intensities of the very strong lines of C IV λ 1549 Å and Si IV λλ 1394, 1403 Å observed in spectra obtained with Skylab experiment S019 provide a sensitive discrimination of spectral type between B0 and B2. Eye estimates of the Si IV/C IV ratio are tabulated for 33 B0-B2, class III-V stars of which 11 are emission-line stars. Seven of the emission-line stars show significantly smaller ratios than normal stars of the same MK class. The most outstanding examples are 60 Cyg, o Pup, η Cen, and Ara.

Why it matters

OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

The intensities of the very strong lines of C IV λ 1549 Å and Si IV λλ 1394, 1403 Å observed in spectra obtained with Skylab experiment S019 provide a sensitive discrimination of spectral type between B0 and B2. Eye estimates of the Si IV/C IV ratio are tabulated for 33 B0-B2, class III-V stars of which 11 are emission-line stars. Seven of the emission-line stars show significantly smaller ratios than normal stars of the same MK class. The most outstanding examples are 60 Cyg, o Pup, η Cen, and Ara.

Key concepts: Stars, Physics, Astrophysics, Ultraviolet, Spectral line, Emission spectrum, Stellar classification, Line (geometry)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Ultraviolet Si IV/C IV Ratios for Be Stars — Research Paper | ScholarLens