Araştırma Makalesi

Updated Orbital Decay Rate of WASP-12 with New Data from TESS and Ground-based Observations

Cilt: 4 Sayı: 2 31 Aralık 2023
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Updated Orbital Decay Rate of WASP-12 with New Data from TESS and Ground-based Observations

Abstract

We investigate the orbital decay behavior of the well-studied hot Jupiter WASP-12\,b orbiting its late-F host star on a 1.09-day orbit by analyzing its transit timings. Thanks to precise photometric data covering nearly 15 years of observations from the space and the ground since the discovery of the planet, including a transit light curve of our own, it became possible to study this behaviour in its details. This work updates the orbital period to a new value of $P = 1.0914202527 \pm 0.000000039\,\text{days}$ and agrees with the previous finding that the planetary orbit has been shrinking with an updated rate of $-31.03 \pm 0.94\,\text{ms yr}^{-1}$. This corresponds to an orbital decay timescale of $\tau =P/|\dot{P}| = 3.04 \pm 0.09\,\text{Myr}$ that we attribute to the strong tidal interactions between the host-star and the planet. We also update the reduced stellar tidal quality factor as $Q_{*}^{\prime} = (1.72 \pm 0.39) \times$ $10^{5}$, which corresponds to the lower bound of the previously reported values of the parameter.

Keywords

Kaynakça

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Ayrıntılar

Birincil Dil

İngilizce

Konular

Astronomik Bilimler (Diğer)

Bölüm

Araştırma Makalesi

Erken Görünüm Tarihi

18 Aralık 2023

Yayımlanma Tarihi

31 Aralık 2023

Gönderilme Tarihi

31 Mayıs 2023

Kabul Tarihi

6 Eylül 2023

Yayımlandığı Sayı

Yıl 2023 Cilt: 4 Sayı: 2

Kaynak Göster

Cited By

TJAA, Türk Astronomi Derneğinin (TAD) bir yayınıdır.