Reference : A low-density hot Jupiter in a near-aligned, 4.5-day orbit around a $V$ = 10.8, F5V star
E-prints/Working papers : Already available on another site
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/232274
A low-density hot Jupiter in a near-aligned, 4.5-day orbit around a $V$ = 10.8, F5V star
English
Anderson, D. R. mailto [> >]
Bouchy, F. [> >]
Brown, D. J. A. [> >]
Burdanov, Artem mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Collier Cameron, A. [> >]
Delrez, L. [> >]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Hellier, C. [> >]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Lendl, M. [> >]
Maxted, P. F. L. [> >]
Nielsen, L. D. [> >]
Pepe, F. [> >]
Pollacco, D. [> >]
Queloz, D. [> >]
Ségransan, D. [> >]
Smalley, B. [> >]
Temple, L. Y. [> >]
Triaud, A. H. M. J. [> >]
Udry, S. [> >]
West, R. G. [> >]
1-Sep-2018
No
[en] Astrophysics - Earth and Planetary Astrophysics
[en] We report the independent discovery and characterisation of a hot Jupiter in a 4.5-d, transiting orbit around the star TYC 7282-1298-1 ($V$ = 10.8, F5V). The planet has been pursued by the NGTS team as NGTS-2b and by ourselves as WASP-179b. We characterised the system using a combination of photometry from WASP-South and TRAPPIST-South, and spectra from CORALIE (around the orbit) and HARPS (through the transit). We find the planet's orbit to be nearly aligned with its star's spin. From a detection of the Rossiter-McLaughlin effect, we measure a projected stellar obliquity of $\lambda = -19 \pm 6^\circ$. From line-profile tomography of the same spectra, we measure $\lambda = -11 \pm 5^\circ$. We find the planet to have a low density ($M_{\rm P}$ = 0.67 $\pm$ 0.09 $M_{\rm Jup}$, $R_{\rm P}$ = 1.54 $\pm$ 0.06 $R_{\rm Jup}$), which, along with its moderately bright host star, makes it a good target for transmission spectroscopy. We find a lower stellar mass ($M_*$ = $1.30 \pm 0.07$ $M_\odot$) than reported by the NGTS team ($M_*$ = $1.64 \pm 0.21$ $M_\odot$), though the difference is only $1.5$ $\sigma$.
http://hdl.handle.net/2268/232274
http://adsabs.harvard.edu/abs/2018arXiv180907709A
Submitted to AJ. 9 pages, 6 figures, 5 tables
https://arxiv.org/pdf/1809.07709.pdf

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