21 research outputs found
A nearly polar orbit for the extrasolar hot Jupiter WASP-79b
We report the measurement of a spin-orbit misalignment for WASP-79b, a recently discovered, bloated hot Jupiter from the Wide Angle Search for Planets (WASP) survey. Data were obtained using the CYCLOPS2 optical-fiber bundle and its simultaneous calibrat
Hats-3b: An inflated hot jupiter transiting an F-type star
We report the discovery by the HATSouth survey of HATS-3b, a transiting extrasolar planet orbiting a V = 12.4 F dwarf star. HATS-3b has a period of P = 3.5479 days, mass of Mp = 1.07 M J, and radius of R p = 1.38 R J. Given the radius of the planet, the
HATS-4b: A dense hot Jupiter transiting a super metal-rich G star
We report the discovery by the HATSouth survey of HATS-4b, an extrasolar planet transiting a V = 13.46 mag
G star. HATS-4b has a period of P ≈ 2.5167 days, mass of Mp ≈ 1.32 MJup, radius of Rp ≈ 1.02 RJup, and
density of ρp = 1.55 ± 0.16 g cm−3 ≈ 1.24 ρJup. The host star has a mass of 1.00 M , a radius of 0.92 R , and a
very high metallicity [Fe/H]= 0.43 ± 0.08. HATS-4b is among the densest known planets with masses between
1 and 2 MJ and is thus likely to have a significant content of heavy elements of the order of 75 M⊕. In this paper
we present the data reduction, radial velocity measurements, and stellar classification techniques adopted by the
HATSouth survey for the CORALIE spectrograph. We also detail a technique for simultaneously estimating v sin i
and macroturbulence using high resolution spectra.Development of the HATSouth project was funded by NSFMRI
grant NSF/AST-0723074, operations have been supported by
NASA grants NNX09AB29G and NNX12AH91H, and followup
observations receive partial support from grant NSF/AST-
1108686. A.J. acknowledges support from FONDECYT project
1130857, BASAL CATA PFB-06, and projects IC120009 “Millennium
Institute of Astrophysics (MAS)” and P10-022-F of the
Millennium Science Initiative, Chilean Ministry of Economy.
R.B. and N.E. are supported by CONICYT-PCHA/Doctorado
Nacional. R.B. acknowledges additional support from Nucleus
P10-022-F of the Millennium Science Initiative, Chilean Ministry
of Economy. V.S. acknowledges support form BASAL
CATA PFB-06. M.R. acknowledges support from FONDECYT
postdoctoral fellowship 3120097. Australian access to the Magellan Telescopeswas supported
through the National Collaborative Research Infrastructure
Strategy of the Australian Federal Government. Work at the Australian National University is supported by
ARC Laureate Fellowship Grant FL0992131. We acknowledge
the use of the AAVSO Photometric All-Sky Survey (APASS),
funded by the RobertMartin Ayers Sciences Fund, NASA’s Astrophysics
Data System Bibliographic Services, and the SIMBADdatabase,
operated at CDS, Strasbourg, France. Operations
at the MPG/ESO 2.2 m Telescope are jointly performed by the
Max Planck Gesellschaft and the European Southern Observatory
HATS-5b: A transiting hot saturn from the HATsouth survey
We report the discovery of HATS-5b, a transiting hot Saturn orbiting a G-type star, by the HATSouth survey. HATS-5b has a mass of Mp 0.24 MJ, radius of Rp 0.91 R J, and transits its host star with a period of P 4.7634 days. The radius of HATS-5b is consistent with both theoretical and empirical models. The host star has a V-band magnitude of 12.6, mass of 0.94 M ⊙, and radius of 0.87 R. The relatively high scale height of HATS-5b and the bright, photometrically quiet host star make this planet a favorable target for future transmission spectroscopy follow-up observations. We reexamine the correlations in radius, equilibrium temperature, and metallicity of the close-in gas giants and find hot Jupiter-mass planets to exhibit the strongest dependence between radius and equilibrium temperature. We find no significant dependence in radius and metallicity for the close-in gas giant population.Development of the HATSouth project was funded by NSF
MRI grant NSF/AST-0723074, operations are supported by
NASA grant NNX12AH91H, and follow-up observations receive
partial support from grant NSF/AST-1108686. Work at
the Australian National University is supported by ARC Laureate
Fellowship Grant FL0992131. A.J.
acknowledges support from FONDECYT project 1130857,
BASAL CATA PFB-06, and projects IC120009 “Millennium
Institute of Astrophysics (MAS)” and P10-022-F of the Millennium
Science Initiative, Chilean Ministry of Economy. V.S.
acknowledges support form BASAL CATA PFB-06. M.R. acknowledges
support from FONDECYT postdoctoral fellowship
No3120097. R.B. and N.E. acknowledge support from
CONICYT-PCHA/Doctorado Nacional and Fondecyt project
1130857. We acknowledge the
use of the AAVSO Photometric All-Sky Survey (APASS),
funded by the Robert Martin Ayers Sciences Fund, and the
SIMBAD database, operated at CDS, Strasbourg, France. Operations
at the MPG/ESO 2.2 m telescope are jointly performed
by the Max Planck Gesellschaft and the European Southern
Observatory. Australian access to the Magellan Telescopes was supported
through the National Collaborative Research Infrastructure
Strategy of the Australian Federal Government
HATS-1b: The first transiting planet discovered by the hatsouth survey
We report the discovery of HATS-1b, a transiting extrasolar planet orbiting the moderately bright V = 12.05 G dwarf star GSC 6652-00186, and the first planet discovered by HATSouth, a global network of autonomous wide-field telescopes. HATS-1b has a period of P ≈ 3.4465 days, mass of Mp ≈ 1.86 MJ, and radius of Rp ≈ 1.30 RJ. The host star has a mass of 0.99 M⊙ and radius of 1.04 R⊙. The discovery light curve of HATS-1b has near-continuous coverage over several multi-day timespans, demonstrating the power of using a global network of telescopes to discover transiting planets.Development of the HATSouth project was funded by NSF
MRI grant NSF/AST-0723074, operations are supported by
NASA grant NNX09AB29G, and follow-up observations received
partial support from grant NSF/AST-1108686. Followup
observations with the ESO 2.2 m/FEROS instrument were performed under MPI guaranteed time (P087.A-9014(A),
P088.A-9008(A), P089.A-9008(A)) and Chilean time (P087.C-
0508(A)). A.J. acknowledges support from Fondecyt project
1095213, Ministry of Economy ICM Nuclei P07-021-F and
P10-022-F, Anillo ACT-086 and BASAL CATA PFB-06. V.S.
acknowledges support form BASAL CATA PFB-06. M.R. acknowledges
support from a Fondencyt postdoctoral fellowship
N 3120097 and contributions from the ALMA-CONICYT
FUND Project N 31090015. R.B. and N.E. acknowledge support
from Fondecyt project 1095213. Work at the
Australian National University is supported by ARC Laureate
Fellowship Grant FL0992131. We acknowledge the use of
the AAVSO Photometric All-Sky Survey (APASS), funded by
the Robert Martin Ayers Sciences Fund, and the SIMBAD
database, operated at CDS, Strasbourg, France
HATS-17b: A TRANSITING COMPACT WARM JUPITER in A 16.3 DAY CIRCULAR ORBIT
We report the discovery of HATS-17b, the first transiting warm Jupiter of the HATSouth network. HATS-17b transits its bright (V = 12.4) G-type ( = , = ) metal-rich ([Fe/H] = +0.3 dex) host star in a circular orbit with a period of P = days. HATS-17b has a very compact radius of given its Jupiter-like mass of . Up to 50% of the mass of HATS-17b may be composed of heavy elements in order to explain its high density with current models of planetary structure. HATS-17b is the longest period transiting planet discovered to date by a ground-based photometric survey, and is one of the brightest transiting warm Jupiter systems known. The brightness of HATS-17 will allow detailed follow-up observations to characterize the orbital geometry of the system and the atmosphere of the planet
HATS-31B THROUGH HATS-35B: FIVE TRANSITING HOT JUPITERS DISCOVERED by the HATSOUTH SURVEY
We report the discovery of five new transiting hot-Jupiter planets discovered by the HATSouth survey, HATS-31b through HATS-35b. These planets orbit moderately bright stars with V magnitudes within the range of – mag while the planets span a range of masses of – and have somewhat inflated radii between and . These planets can be classified as typical hot Jupiters, with HATS-31b and HATS-35b being moderately inflated gas giant planets with radii of and , respectively, that can be used to constrain inflation mechanisms. All five systems present a higher Bayesian evidence for a fixed-circular-orbit model than for an eccentric orbit. The orbital periods range from day for HATS-35b) to day for HATS-31b. Additionally, HATS-35b orbits a relatively young F star with an age of Gyr. We discuss the analysis to derive the properties of these systems and compare them in the context of the sample of well-characterized transiting hot Jupiters known to date
A highly inclined orbit for the 110 day period m-dwarf companion KOI-368.01
We report the detection of asymmetry in the transit light curves of the 110 day period companion to KOI-368, a rapidly rotating A-dwarf. The significant distortion in the transit light curve is attributed to spin-orbit misalignment between the transitin