Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
| Autor: | N L Eisner, C Johnston, S Toonen, A J Frost, S Janssens, C J Lintott, S Aigrain, H Sana, M Abdul-Masih, K Z Arellano-Córdova, P G Beck, E Bordier, E Cannon, A Escorza, M Fabry, L Hermansson, S B Howell, G Miller, S Sheyte, S Alhassan, E M L Baeten, F Barnet, S J Bean, M Bernau, D M Bundy, M Z Di Fraia, F M Emralino, B L Goodwin, P Hermes, T Hoffman, M Huten, R Janíček, S Lee, M T Mazzucato, D J Rogers, M P Rout, J Sejpka, C Tanner, I A Terentev, D Urvoy |
|---|---|
| Přispěvatelé: | Low Energy Astrophysics (API, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Science & Technology
Astronomy close [binaries(including multiple)] FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astronomy & Astrophysics PERTURBATIONS CATALOG EVOLUTION massive [stars] ECLIPSING BINARIES STELLAR Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Physical Sciences Astrophysics::Solar and Stellar Astrophysics GALAXY ZOO Astrophysics::Earth and Planetary Astrophysics individual: TIC 470710327 [stars] PROJECT Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 511, 4, pp. 4710-4723 Monthly Notices of the Royal Astronomical Society, 511, 4710-4723 Monthly Notices of the Royal Astronomical Society, 511(4), 4710-4723. Oxford University Press |
| ISSN: | 0035-8711 |
| Popis: | We report the discovery and analysis of a massive, compact, hierarchical triple system (TIC 470710327) initially identified by citizen scientists in data obtained by NASA's Transiting Exoplanet Survey Satellite (TESS). Spectroscopic follow-up observations obtained with the HERMES spectrograph, combined with eclipse timing variations (ETVs), confirm that the system is comprised of three OB stars, with a compact 1.10 d eclipsing binary and a non-eclipsing tertiary on a 52.04 d orbit. Dynamical modelling of the system (from radial velocity and ETVs) reveal a rare configuration wherein the tertiary star (O9.5-B0.5V; 14-17 M$_{\odot}$) is more massive than the combined mass of the inner binary (10.9-13.2 M$_{\odot}$). Given the high mass of the tertiary, we predict that this system will undergo multiple phases of mass transfer in the future, and likely end up as a double neutron star gravitational wave progenitor or an exotic Thorne-Zytkow object. Further observational characterisation of this system promises constraints on both formation scenarios of massive stars as well as their exotic evolutionary end-products. Accepted for publication in MNRAS (11 pages, 8 figures) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|