ScholarLens Back to search
1984•The Astrophysical JournalRequires access

A radial velocity study of XY Leonis

Bruce J. Hrivnak, E. F. Milone, Grant M. Hill, W. A. Fisher

Open publisher page 18 citations

Abstract

Spectra have been obtained over the past three seasons for the short-period (Od.28) contact binary XY Leo. Exposure times were kept short by the use of an image tube. By cross correlating the blended stellar spectra of this system with spectra of velocity standards of similar spectral type, accurate component velocities were measured. Corrections for tidal and eclipse effects were then investigated based upon a model of the system. With these corrections, the following spectroscopic elements were determined: K1 = 108 + or - 2 km/s, K2 = 216 + or - 4 km/s, and Vo = -50 + or - 2 km/s, which lead to q = 0.50 + or - 0.02, M1 = 0.87 + or - 0.04 solar mass, and M2 = 0.44 + or - 0.02 solar mass. Strong Ca II H and K emission was observed at all phases.

About this research paper

What this paper is about

Spectra have been obtained over the past three seasons for the short-period (Od.28) contact binary XY Leo. Exposure times were kept short by the use of an image tube. By cross correlating the blended stellar spectra of this system with spectra of velocity standards of similar spectral type, accurate component velocities were measured. Corrections for tidal and eclipse effects were then investigated based upon a model of the system. With these corrections, the following spectroscopic elements were determined: K1 = 108 + or - 2 km/s, K2 = 216 + or - 4 km/s, and Vo = -50 + or - 2 km/s, which lead to q = 0.50 + or - 0.02, M1 = 0.87 + or - 0.04 solar mass, and M2 = 0.44 + or - 0.02 solar mass. Strong Ca II H and K emission was observed at all phases.

Why it matters

OpenAlex reports 18 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

Spectra have been obtained over the past three seasons for the short-period (Od.28) contact binary XY Leo. Exposure times were kept short by the use of an image tube. By cross correlating the blended stellar spectra of this system with spectra of velocity standards of similar spectral type, accurate component velocities were measured. Corrections for tidal and eclipse effects were then investigated based upon a model of the system. With these corrections, the following spectroscopic elements were determined: K1 = 108 + or - 2 km/s, K2 = 216 + or - 4 km/s, and Vo = -50 + or - 2 km/s, which lead to q = 0.50 + or - 0.02, M1 = 0.87 + or - 0.04 solar mass, and M2 = 0.44 + or - 0.02 solar mass. Strong Ca II H and K emission was observed at all phases.

Key concepts: Physics, Radial velocity, Astrophysics, Astrometry, Spectral line, Binary star, Stars, Stellar mass

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
A radial velocity study of XY Leonis — Research Paper | ScholarLens