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Period Changes of the Algol System SZ Herculis
| Content Provider | Scilit |
|---|---|
| Author | Lee, J. W. Lee, C. -U. Kim, S. -L. Kim, H. -I. Park, J. -H. Hinse, T. C. |
| Copyright Year | 2011 |
| Description | New CCD photometric observations of SZ Her were obtained between February and May 2008. More than 1,100 times of minimum light spanning more than one century were used for the period analysis. We find that the orbital period of SZ Her has varied due to a combination of two periodic variations, with cycle lengths of $P_{3}$ = 85.8 yr and $P_{4}$ = 42.5 yr and semi-amplitudes of $K_{3}$ = 0.013 days and $K_{4}$ = 0.007 days, respectively. The most reasonable explanation for them is a pair of light-time-travel (LTT) effects driven by the existence of two M-type companions with minimum masses of $M_{3}$ = 0.22 $M_{⊙}$ and $M_{4}$ = 0.19 $M_{⊙}$, located at nearly 2:1 mean motion resonance. Then, SZ Her is a quadruple system and the 3rd and 4th components would stay in the stable orbital resonance. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/65A966E91F47C95E85C69E6CEDC21B8E/S1743921311027670a.pdf/div-class-title-period-changes-of-the-algol-system-sz-herculis-div.pdf |
| Ending Page | 314 |
| Page Count | 2 |
| Starting Page | 313 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921311027670 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S282 |
| Volume Number | 7 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2011-07-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Astronomy and Astrophysics Close Eclipsing Individual (sz Herculis) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
