HAT-P-34b-HAT-P-37b: FOUR TRANSITING PLANETS MORE MASSIVE THAN JUPITER ORBITING MODERATELY BRIGHT STARS

Bakos, G. Á.; Hartman, J. D.; Torres, Guillermo; Béky, B.; Latham, David W.; Buchhave, Lars A.; Csubry, Z.; Kovács, G.; Bieryla, Allyson; Quinn, Samuel N.; Szklenár, T.; Esquerdo, Gilbert A.; Shporer, Avi; Noyes, R. W.; Fischer, Debra A.; Johnson, John Asher; Howard, Andrew W.; Marcy, Geoffrey W.; Sato, Bun’ei; Penev, K.; Everett, Mark E.; Sasselov, Dimitar; Fürész, Gábor; Stefanik, R. P.; Lázár, J.; Papp, I.; Sári, P.

doi:10.1088/0004-6256/144/1/19

Cited by 83 publications

(26 citation statements)

References 80 publications

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“…HAT-P-37b was identified by the HATNet survey and was confirmed by high-resolution spectroscopy and further photometric observations (Bakos et al 2012). HAT-P-37b is a hot Jupiter with a planetary mass of 1.169±0.103 MJup, a radius of 1.178±0.077 RJup, and a period of 2.797436±0.000007 d. Additional follow-up observations by Maciejewski et al (2016) confirmed these planetary parameters.…”

Section: Hat-p-37bmentioning

confidence: 61%

Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope

Turner

Leiter

Biddle

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present new photometric data of 11 hot Jupiter transiting exoplanets (CoRoT-12b, HAT-P-5b, HAT-P-12b, HAT-P-33b, HAT-P-37b, WASP-2b, WASP-24b, WASP-60b, WASP-80b, WASP-103b and XO-3b) in order to update their planetary parameters and to constrain information about their atmospheres. These observations of CoRoT-12b, HAT-P-37b and WASP60b are the first follow-up data since their discovery. Additionally, the first near-UV transits of WASP-80b and WASP-103b are presented. We compare the results of our analysis with previous work to search for transit timing variations (TTVs) and a wavelength dependence in the transit depth. TTVs may be evidence of a third body in the system, and variations in planetary radius with wavelength can help constrain the properties of the exoplanet's atmosphere. For WASP-103b and XO-3b, we find a possible variation in the transit depths which may be evidence of scattering in their atmospheres. The B-band transit depth of HAT-P-37b is found to be smaller than its near-IR transit depth and such a variation may indicate TiO/VO absorption. These variations are detected from 2-4.6σ , so follow-up observations are needed to confirm these results. Additionally, a flat spectrum across optical wavelengths is found for five of the planets (HAT-P-5b, HAT-P-12b, WASP-2b, WASP-24b and WASP-80b), suggestive that clouds may be present in their atmospheres. We calculate a refined orbital period and ephemeris for all the targets, which will help with future observations. No TTVs are seen in our analysis with the exception of WASP-80b and follow-up observations are needed to confirm this possible detection.

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Section: Hat-p-37bmentioning

confidence: 61%

Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope

Turner

Leiter

Biddle

et al. 2017

Monthly Notices of the Royal Astronomical Society

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“…We observed HAT-P-36b during 4 transit events: On 15 Feb 2018 by using I filter, on 08 Apr 2018 and 06 May 2018 by using V filter in JCBT and on 20 Jun 2018 by using V filter in HCT. The host star is a G5V star with mass, radius and T ef f of 1.03 ± 0.03 M , 1.041 ± 0.013 R and 5620 ± 40 K respectively (Bakos et al 2012). This star is also very similar to the Sun in terms of mass, radius and T ef f .…”

Section: Hat-p-36bmentioning

confidence: 99%

“…We have used the Markov Chain Monte Carlo (MCMC) technique employing Metropolis-Hastings algorithm (Collier Cameron et al 2010) to fit the models with the observed light curves and thus determined the various physical parameters from the best fit. An essential parameter of the model is the orbital period which we have kept fixed at the values given in previously published results (Collier Cameron et al 2010;Gillon et al 2011;Bakos et al 2012;Penev et al 2016;Collins et al 2017). For all the transit events we have assumed circular orbits of the planets.…”

Section: Data Reduction Analysis and Modelingmentioning

confidence: 99%

“…As a result of these processing and modeling we could determine the transit parameters of the planets more accurately than the previously published results. We have adopted the stellar parameters such as mass, radius and effective temperature of the host stars and the semi-amplitude of the oscillation of the radial velocity of the host stars due to the planets (K RV ) from existing data available in the literature (Collier Cameron et al 2010;Gillon et al 2011;Bakos et al 2012;Lehmann et al 2015;Penev et al 2016;Collins et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Precise Photometric Transit Follow-up Observations of Five Close-in Exoplanets: Update on Their Physical Properties

Chakrabarty

Sengupta

2019

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We report the results of the high precision photometric follow-up observations of five transiting hot jupiters -WASP-33b, WASP-50b, WASP-12b, HATS-18b and HAT-P-36b. The observations are made from the 2m Himalayan Chandra Telescope at Indian Astronomical Observatory, Hanle and the 1.3m J. C. Bhattacharyya Telescope at Vainu Bappu Observatory, Kavalur. This exercise is a part of the capability testing of the two telescopes and their back-end instruments. Leveraging the large aperture of both the telescopes used, the images taken during several nights were used to produce the transit light curves with high photometric S/N (> 200) by performing differential photometry. In order to reduce the fluctuations in the transit light curves due to various sources such as stellar activity, varying sky transparency etc. we preprocessed them using wavelet denoising and applied Gaussian process correlated noise modeling technique while modeling the transit light curves. To demonstrate the efficiency of the wavelet denoising process we have also included the results without the denoising process. A state-of-the-art algorithm used for modeling the transit light curves provided the physical parameters of the planets with more precise values than reported earlier.

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“…For example, CoRoT-10b (Bonomo et al 2010) and HD17156 (Fischer et al 2007) with a masses of MP= 2.76 MJ and MP= 3.3MJ, respectively, present circularization timescales greater than 20 Gyr. Two eccentric systems of this sample that present short circularization timescales are HAT-P-2b (MP= 8.87MJ, τcirc = 0.7 Gyr, Bakos et al 2007), and HAT-P-34b (MP = 3.33 MJ, τcirc = 0.3 Gyr, Bakos et al 2012). Both systems, however, are significantly younger (∼ 2 Gyr) than EPIC 201498078 (8.5 Gyr), which could help in explaining their non-circular orbits.…”

Section: Orbital Evolutionmentioning

confidence: 99%

K2-161b: a low-density super-Neptune on an eccentric orbit

Brahm

Espinoza

Jordán

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We report the discovery of EPIC 201498078b, which was first identified as a planetary candidate from Kepler K2 photometry of Campaign 14, and whose planetary nature and orbital parameters were then confirmed with precision radial velocities. EPIC 201498078b is half as massive as Saturn (M P = 0.179 ± 0.021 M J ), and has a radius of R P = 0.840 ± 0.011 R J , which translates into a bulk density of ρ P = 0.37 ± 0.05 g cm −3 . EPIC 201498078b transits its slightly evolved G-type host star (M = 1.105 ± 0.019 M , R = 1.669 ± 0.022 R ) every 11.63364 ± 0.00010 days and presents a significantly eccentric orbit (e = 0.420±0.034). We estimate a relatively short circularization timescale of 1.8 Gyr for the planet, but given the advanced age of the system we expect the planet to be engulfed by its evolving host star in ∼ 1 Gyr before the orbit circularizes. The low density of the planet coupled to the brightness of the host star (J = 9.4) makes this system one of the best candidates known to date in the super-Neptune regime for atmospheric characterization via transmission spectroscopy, and to further study the transition region between ice and gas giant planets.

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HAT-P-34b-HAT-P-37b: FOUR TRANSITING PLANETS MORE MASSIVE THAN JUPITER ORBITING MODERATELY BRIGHT STARS

Cited by 83 publications

References 80 publications

Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope

Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope

Precise Photometric Transit Follow-up Observations of Five Close-in Exoplanets: Update on Their Physical Properties

K2-161b: a low-density super-Neptune on an eccentric orbit

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