TIME-RESOLVED H-ALPHA SPECTROSCOPY OF THE SU UMAJORIS STAR TU MENSAE IN QUIESCENCE
| dc.contributor.author | MENNICKENT, RE | |
| dc.date.accessioned | 2025-01-21T01:35:01Z | |
| dc.date.available | 2025-01-21T01:35:01Z | |
| dc.date.issued | 1995 | |
| dc.description.abstract | We have analyzed 67 spectra of TU Men in the lambda 5800-7000 Angstrom spectral region with 2 Angstrom resolution covering a time range of approximate to 14 hours. An orbital period of 2.(h)813 +/- 0.(h)005 was derived from the radial velocity variations of the H alpha double emission line. This implies a not-evolved secondary mass M(2) = 0.35 +/- 0.03 M.. Unfortunately, our K semiampiitude diagnostic method gives two possible solutions: the most probable K is 108 +/- 10 km s(-1). From that value and using measures on the emission profile, a system mass ratio q (M(2)/M(1)) = 0.455 +/- 0.045, a primary mass M(1) = 0.785 +/- 0.145M. and an inclination angle i = 52 +/- 5 degrees were calculated. However, a second K value arising from the analysis of the central parts of the H alpha profile is K = 87 +/- 2 km s(-1). This solution yields to a mass ratio more compatible with the tidal disk instability model (q approximate to 0.33, M(1) approximate to 1.06M. and i approximate to 44 degrees). Periodic variations up to 100% of the H alpha equivalent width characterized by two minima centered at phases 0.8 and 0.3 were observed. The FWHM of the Ha red and violet peak are anticorrelated and show a double wave behaviour during the orbital cycle. The peak separation and the V/R ratio between the intensities of the violet and the red peak and also the FWHM of the whole emission profile, oscillate with the orbital period. Two bright disk inhomogeneities could explain these results. | |
| dc.fuente.origen | WOS | |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.uri | https://repositorio.uc.cl/handle/11534/97630 | |
| dc.identifier.wosid | WOS:A1995QH14800019 | |
| dc.issue.numero | 1 | |
| dc.language.iso | en | |
| dc.pagina.final | 134 | |
| dc.pagina.inicio | 126 | |
| dc.revista | Astronomy & astrophysics | |
| dc.rights | acceso restringido | |
| dc.subject | NOVAE, CATACLYSMIC VARIABLES | |
| dc.subject | STARS, INDIVIDUAL, TU MEN | |
| dc.title | TIME-RESOLVED H-ALPHA SPECTROSCOPY OF THE SU UMAJORIS STAR TU MENSAE IN QUIESCENCE | |
| dc.type | artículo | |
| dc.volumen | 294 | |
| sipa.index | WOS | |
| sipa.trazabilidad | WOS;2025-01-12 |