The Rise and Fall of the Eclipsing Binary HS Hydrae
- 11 October 2021
- journal article
- research article
- Published by American Astronomical Society in The Astronomical Journal
- Vol. 162 (5), 189
- https://doi.org/10.3847/1538-3881/ac1f97
Abstract
HS Hydrae is a short period eclipsing binary (P (orb) = 1.57 day) that belongs to a rare group of systems observed to have rapidly changing inclinations. This evolution is due to a third star on an intermediate orbit, and results in significant differences in eclipse depths and timings year to year. Zasche & Paschke revealed that HS Hydrae's eclipses were rapidly fading from view, predicting they would cease around 2022. Using 25 days of photometric data from Sector 009 of the Transiting Exoplanet Survey Satellite (TESS), we find that the primary eclipses for HS Hydrae were only 0.00173 +/- 0.00007 mag in depth in March 2019. This data from TESS likely represents the last eclipses detected from HS Hydrae. We also searched the Digitization of the Harvard Astronomical Plate Collection archive for historic data from the system. With a total baseline of over 125 yr, this unique combination of data sets-from photographic plates to precision space-based photometry-allows us to trace the emergence and decay of eclipses from HS Hydrae, and further constrain its evolution. Recent TESS observations from Sector 035 confirm that eclipses have ceased for HS Hya, and we estimate they will begin again in 2195.Funding Information
- NSF ∣ EHR ∣ Division of Graduate Education (DGE-1839285)
- NSF ∣ EHR ∣ Division of Graduate Education (DGE-1762114)
This publication has 31 references indexed in Scilit:
- Astropy: A community Python package for astronomyAstronomy & Astrophysics, 2013
- emcee: The MCMC HammerPublications of the Astronomical Society of the Pacific, 2013
- parsec: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution CodeMonthly Notices of the Royal Astronomical Society, 2012
- HS Hydrae about to turn off its eclipsesAstronomy & Astrophysics, 2012
- Q (Tidal Quality Factor)Published by Springer Science and Business Media LLC ,2011
- THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE): MISSION DESCRIPTION AND INITIAL ON-ORBIT PERFORMANCEThe Astronomical Journal, 2010
- DIGITAL ACCESS TO A SKY CENTURY AT HARVARD: INITIAL PHOTOMETRY AND ASTROMETRYThe Astronomical Journal, 2010
- A box-fitting algorithm in the search for periodic transitsAstronomy & Astrophysics, 2002
- The Change in the Inclination Angle of the Noneclipsing Binary SS Lacertae: Future EclipsesThe Astronomical Journal, 2001
- The Absolute Dimensions of Eclipsing Binaries. XXII. The Unevolved F-Type System HS HydraeThe Astronomical Journal, 1997