Ö Baştürk
Transit timing variation analysis of the low-mass brown dwarf KELT-1 b
Baştürk, Ö; Taylor, J; Yalçınkaya, S; Mancini, L; Esmer, EM; Tekin, M; Tezcan, F; Evans, DF; Tezcan, CT; Bruni, I; Yeşilyaprak, C
Authors
Dr John Taylor j.k.taylor@keele.ac.uk
S Yalçınkaya
L Mancini
EM Esmer
M Tekin
F Tezcan
DF Evans
CT Tezcan
I Bruni
C Yeşilyaprak
Abstract
We investigate whether there is a variation in the orbital period of the short-period brown dwarf-mass KELT-1 b, which is one of the best candidates to observe orbital decay. We obtain 19 high-precision transit light curves of the target using six different telescopes. We add all precise and complete transit light curves from open databases and the literature, as well as the available TESS observations from sectors 17 and 57, to form a transit timing variation (TTV) diagram spanning more than 10 years of observations. The analysis of the TTV diagram, however, is inconclusive in terms of a secular or periodic variation, hinting that the system might have synchronized. We update the transit ephemeris and determine an informative lower limit for the reduced tidal quality parameter of its host star of Q'?>(8.5±3.9)×106 assuming that the stellar rotation is not yet synchronised. Using our new photometric observations, published light curves, the TESS data, archival radial velocities and broadband magnitudes, we also update the measured parameters of the system. Our results are in good agreement with those found in previous analyses.
Citation
Baştürk, Ö., Taylor, J., Yalçınkaya, S., Mancini, L., Esmer, E., Tekin, M., …Yeşilyaprak, C. (2023). Transit timing variation analysis of the low-mass brown dwarf KELT-1 b. Monthly Notices of the Royal Astronomical Society, 521(1), 1200-1209. https://doi.org/10.1093/mnras/stad248
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 16, 2023 |
Online Publication Date | Jan 25, 2023 |
Publication Date | 2023-05 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 521 |
Issue | 1 |
Pages | 1200-1209 |
DOI | https://doi.org/10.1093/mnras/stad248 |
Keywords | methods:data analysis; techniques:photometric; stars:fundamental parameteres; stars:individual:KELT-1-planetary systems |
Publisher URL | https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stad248/7005238?redirectedFrom=fulltext |
Files
2301.07619.pdf
(1.6 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by-nc/4.0/
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