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Education
2006-12-01- Presently studying molecular gas and galactic dust in elliptical radio galaxies., Institute of Milimetric Radio Astronomy (IRAM). Granada, Spain
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Seminaries
2006-10-05- Summer School in Grenoble, France of the Institute of Milimetric Radio Astronomy (IRAM).
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Investigation´s Projects
| Title: Minima timing of the low mass eclipsing binary CM-Draconis |
| Institution: Instituto Astrofísico de Canarias, España |
| Date: 07th July, 2006 |
| Content: The binary star system CM Draconis has been studied before with data up until the year 1999 \cite{Deeg2000}. Since we have new data, from that year to the year 2004, this report wishes to continue analizing the binary star system, now including this new data, resulting in a thorough analysis.
In the article presented by Deeg at al. 2000, they had 41 measured sets of minimum times of the eclipses with a standard deviation of a lineal efemerides of 5.74 seconds, and they analyzed the power spectrum of the residuals where they show one periodicity of more than 2 seconds of amplitude. This result, plus a periodicity of 750-1050 days, has an amplitude of ~2.8 seconds.
In this project we repeated the analysis with the data that Deeg et al. 2000 had, plus the new data collected until the year 2004. This new set of data has a total of 62 eclipses; 27 of them are primary eclipses and 35 are secondary eclipses. Using this information we did a minimum time eclipses analysis and we did apply it to different situations. The case where the system did not change positions with respect to the observer; the case in which the system moves with a constant velocity with respect to the observer; the case in which the system moves with an acceleration relative to the observer; and finally the case of a sinusoidal motion and a combination between the sinusoidal and a linear motion. With this information we could determine that the binary star system has a very slow acceletation rate of about 9x10^-8 m/s^2 and that it has a non-linear behavior. This acceleration could mean that there is a third body orbiting the system with a very long period, or it could also mean that there is a star relatively close that has some gravitational influence over the system. In order to be able to obtain some conclusions we need to continue the observations of the primary and secondary eclipses of CM Daconis.
We did not find any evidence of the existence of any planet orbiting the binary star system, but the system is compatible with a planet of about 0.74Mj orbiting the stars in about 12 years.
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| Title: Observation of the star HD209458 and its transits. |
| Institution: Florida Institute of Technology. Melbourne, Fl. U.S.A. |
| Date: 10th September, 2002 |
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