Four new eclipsing mid M-dwarf systems from the New Luyten Two Tenths catalog
| Autor: | Irwin, Jonathan M., Charbonneau, David, Esquerdo, Gilbert A., Latham, David W., Winters, Jennifer G., Dittmann, Jason A., Newton, Elisabeth R., Berta-Thompson, Zachory K., Berlind, Perry, Calkins, Michael L. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/1538-3881/aad9a3 |
| Popis: | Using data from the MEarth-North and MEarth-South transit surveys, we present the detection of eclipses in four mid M-dwarf systems: LP 107-25, LP 261-75, LP 796-24, and LP 991-15. Combining the MEarth photometry with spectroscopic follow-up observations, we show that LP 107-25 and LP 796-24 are short-period (1.388 and 0.523 day, respectively) eclipsing binaries in triple-lined systems with substantial third light contamination from distant companions. LP 261-75 is a short-period (1.882 day) single-lined system consisting of a mid M-dwarf eclipsed by a probable brown dwarf secondary, with another distant visual brown dwarf companion. LP 991-15 is a long-period (29.3 day) double-lined eclipsing binary on an eccentric orbit with a geometry which produces only primary eclipses. A spectroscopic orbit is given for LP 991-15, and initial orbits for LP 107-25 and LP 261-75. Comment: 17 pages, 9 figures, 8 tables, emulateapj format. Accepted for publication in AJ |
| Databáze: | arXiv |
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