A ~ 14 Days Star with Two Phase-Locked Modes of Pulsation in the Eros Database
| dc.creator | Beaulieu, J. P. | |
| dc.creator | Buchler, R. | |
| dc.creator | Goupil, M. J. | |
| dc.creator | Kollath, Z. | |
| dc.date | 1997-08-08 | |
| dc.date.accessioned | 2026-07-07T02:23:58Z | |
| dc.date.available | 2026-07-07T02:23:58Z | |
| dc.description | Using CCD photometry obtained by the EROS collaboration in 1991-1993, we have discovered an LMC variable star with a light curve that is oscillating with a mean period of $\sim 14$ days and an amplitude of $\sim$ 0.3 mag. The oscillations appear with irregular amplitude variations. The Fourier spectrum shows that the pulsation of this star is phase locked between two modes of frequencies $f_0$ and 1.5$\times f_0$. Moreover, this object has strong $H α$ and $H β$ emission lines and neutral lines of Helium that suggest a spectral type between late O and early B. In a preliminary analysis, we derive a luminosity of $ L=3.4-3.8L_\odot$ and an effective temperature in the range $\log(T_{eff}) =3.85-4.2$. | |
| dc.description | 5 pages, Latex, 4 .ps figures. to appear in Variable stars and the astrophysical return of microlensing surveys, ed R. Ferlet, J.P.Maillard, éditions frontières | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9708074 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9708074 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/11456 | |
| dc.subject | Astrophysics | |
| dc.title | A ~ 14 Days Star with Two Phase-Locked Modes of Pulsation in the Eros Database | |
| dc.type | text |