| dc.creator | Dai, Zhibin | |
| dc.creator | Qian, Shengbang | |
| dc.creator | Fernández Lajús, Eduardo Eusebio | |
| dc.creator | Baume, Gustavo Luis | |
| dc.date | 2010-05 | |
| dc.date | 2020-04-21T13:17:42Z | |
| dc.date.accessioned | 2023-07-14T19:19:15Z | |
| dc.date.available | 2023-07-14T19:19:15Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/93867 | |
| dc.identifier | https://link.springer.com/article/10.1007%2Fs10509-010-0412-0 | |
| dc.identifier | issn:0004-640X | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7434844 | |
| dc.description | Two CCD photometries of the intermediate polar TV Columbae are made for obtaining two updated eclipse timings with high precision. There is an interval time ~17 yr since the last mid-eclipse time observed in 1991. Thus, the new mid-eclipse times might offer an opportunity to check the previous orbital ephemerides. A calculation indicates that the orbital ephemeris derived by Augusteijn et al. (Astron. Astrophys. Suppl. Ser. 107:219, 1994) should be corrected. Based on the proper linear ephemeris (Hellier in Mon. Not. R. Astron. Soc. 264:132, 1993), the new orbital period analysis suggests a cyclical period variation in the O-C diagram of TV Columbae. Using Applegate's mechanism to explain the periodic oscillation in the O-C diagram, the required energy is larger than the energy that a M0-type star can afford over a complete variation period of ~31.0(±3.0) yr. Thus, the light travel-time effect indicates that the tertiary component in TV Columbae may be a dwarf with a low mass, which is near the lower mass limit of ~0.08M⊙ as long as the inclination of the third body is high enough. | |
| dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
| dc.format | application/pdf | |
| dc.format | 243-248 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Astronomía | |
| dc.subject | Cataclysmic variables | |
| dc.subject | Eclipsing binaries | |
| dc.subject | TV Columbae (estrella) | |
| dc.title | A cyclical period variation detected in the updated orbital period analysis of TV Columbae | |
| dc.type | Articulo | |
| dc.type | Preprint | |
