A5032516087- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- Medical Imaging Techniques and Applications
- Astrophysical Phenomena and Observations
- Advanced Numerical Analysis Techniques
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Space Exploration and Technology
- Laser-Plasma Interactions and Diagnostics
- Astrophysics and Cosmic Phenomena
- Economic Growth and Productivity
- Magnetism in coordination complexes
- Galaxies: Formation, Evolution, Phenomena
- Scientific Research and Discoveries
- Neutrino Physics Research
- Optical Systems and Laser Technology
- Advanced Chemical Physics Studies
- Magnetic confinement fusion research
Princeton University
2013-2021
Lehigh University
2018
Princeton Public Schools
2015
Johns Hopkins University
2008-2011
University of St Andrews
2008
Space Telescope Science Institute
2008
Rochester Institute of Technology
2008
Butler University
1973
Wide field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between properties and their parent stars. We report discovery HAT-P-69b (TOI 625.01) HAT-P-70b 624.01), two new hot Jupiters around A stars from HATNet survey which have also been observed by Transiting Exoplanet Survey Satellite (TESS). has mass 3.58 +0.58/-0.58 MJup radius 1.676 +0.051/-0.033 RJup, residing in prograde 4.79-day orbit. 1.87...
We report the discovery by HATSouth survey of HATS-4b, an extrasolar planet transiting a V = 13.46 mag G star. HATS-4b has period P ≈ 2.5167 days, mass Mp 1.32 MJup, radius Rp 1.02 RJup, and density ρp 1.55 ± 0.16 g cm−3 ≈1.24 ρJup. The host star 1.00 M☉, 0.92 R☉, very high metallicity [Fe/H]=0.43 0.08. is among densest known planets with masses between 1 2 MJ thus likely to have significant content heavy elements order 75 M⊕. In this paper we present data reduction, radial velocity...
Abstract The Transiting Exoplanet Survey Satellite ( TESS ) recently observed 18 transits of the hot Jupiter WASP-4b. sequence occurred 81.6 ± 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely be result a clock error, because observations other Jupiters (WASP-6b, 18b, and 46b) are compatible with constant period, ruling out an offset at 6.4 σ level. 1.3 day orbital period WASP-4b appears decreasing rate <?CDATA $\dot{P}=-12.6\pm 1.2$?> ms per...
We report the discovery of HATS-17b, first transiting warm Jupiter HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M$_{\star}$=1.131 $\pm$ 0.030 M$_{\odot}$, R$_{\star}$=1.091$^{+0.070}_{-0.046}$ R$_{\star}$) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with period P=16.2546 days. has very compact radius 0.777 0.056 R$_J$ given Jupiter-like mass 1.338 0.065 M$_J$. Up to 50% may be composed heavy elements order explain high density current models planetary...
The Transiting Exoplanet Survey Satellite (TESS) is providing precise time-series photometry for most star clusters in the solar neighborhood. Using TESS images, we have begun a Cluster Difference Imaging Photometric (CDIPS), which are focusing both on stars that candidate cluster members, and show indications of youth. Our aims to discover giant transiting planets with known ages, provide light curves suitable studies stellar astrophysics. For this work, made 159,343 young stars, across 596...
We report the discovery of TOI 837b and its validation as a transiting planet. characterize system using data from NASA TESS mission, ESA Gaia ground-based photometry El Sauce ASTEP400, spectroscopy CHIRON, FEROS, Veloce. find that 837 is $T=9.9$ mag G0/F9 dwarf in southern open cluster IC 2602. The star planet are therefore $35^{+11}_{-5}$ million years old. Combining transit with prior on stellar parameters derived color-magnitude diagram, we has an orbital period $8.3\,{\rm d}$ slightly...
We report the first detection of asymmetry in a supernova (SN) photosphere based on SN light echo (LE) spectra Cas A from different perspectives dust concentrations its LE ellipsoid. New LEs are reported difference images, and optical these analyzed compared. After properly accounting for effects finite dust-filament extent inclination, we find one field where He I H alpha features blueshifted by an additional ~4000 km/s relative to other Type IIb 1993J. That same direction does not show any...
We report the discovery by HATSouth survey of HATS-6b, an extrasolar planet transiting a V = 15.2 mag, i 13.7 mag M1V star with mass 0.57 and radius . HATS-6b has period P 3.3253 d, 0.32 , 1.00 zero-albedo equilibrium temperature 712.8 ± 5.1 K. HATS-6 is one lowest stars known to host close-in gas giant planet, its transits are among deepest any system. discuss follow-up opportunities afforded this system, noting that despite faintness star, it expected have highest K-band S/N transmission...
We report the discovery of HAT-P-67b, a hot-Saturn transiting rapidly rotating F-subgiant. HAT-P-67b has radius Rp = 2.085 -0.071/+0.096 RJ,, orbiting M* 1.642 -0.072/+0.155 Msun, R* 2.546 -0.084/+0.099 Rsun host star in ~4.81-day period orbit. place an upper limit on mass planet via radial velocity measurements to be Mp < 0.59 MJ, and lower > 0.056 MJ by limitations Roche lobe overflow. Despite being subgiant, still exhibits relatively rapid rotation, with projected rotational v sin I* 35.8...
We report six new inflated hot Jupiters (HATS-25b through HATS-30b) discovered using the HATSouth global network of automated telescopes. The planets orbit stars with $V$ magnitudes in range $\sim 12-14$ and have masses largely populated $0.5M_J-0.7M_J$ region parameter space but span a wide variety radii, from $1.17R_J$ to $1.75 R_J$. HATS-25b, HATS-28b, HATS-29b HATS-30b are typical ($R_p = 1.17-1.26R_J$) orbiting G-type short period ($P=3.2-4.6$ days) orbits. However, HATS-26b 1.75R_J$,...
We report the discovery of two transiting extrasolar planets by HATSouth survey. HATS-9b orbits an old (10.8 $\pm$ 1.5 Gyr) V=13.3 G dwarf star, with a period P = 1.9153 d. The host star has mass 1.03 M$_{\odot}$, radius 1.503 R$_\odot$ and effective temperature 5366 70 K. planetary companion 0.837 M$_J$, 1.065 R$_J$ yielding mean density 0.85 g cm$^{-3}$ . HATS-10b V=13.1 3.3128 1.1 M$_\odot$, 1.11 5880 120 0.53 0.97 0.7 Both are compact in comparison receiving similar irradiation from...
The two reaction wheel K2 mission promises and has delivered new discoveries in the stellar exoplanet fields. However, due to loss of accurate pointing, it also brings challenges for data reduction processes. In this paper, we describe a pipeline extracting high precision photometry from dataset, present public light curves Campaign 1 target pixel dataset. Key our is derivation global astrometric solutions stamps, which centroids are passed on extraction. We extract sources combined UCAC4...
We report the discovery and characterization of four transiting exoplanets by HATNet survey. The planet HAT-P-50b has a mass radius , orbits bright ( mag) star every days. HAT-P-51b mag, with period HAT-P-52b HAT-P-53b All planets are consistent having circular have masses radii measured to better than 10% precision. low stellar jitter favorable / ratio for HAT-P-51 make it promising target measuring Rossiter–McLaughlin effect Saturn-mass planet.
IW ../submit_V2/abstract.txt ( Row 1 Col 6:48 Ctrl-K H for help We report the discovery by HATSouth network of HATS-7b, a transiting Super-Neptune with mass 0.120+/-0.012MJ, radius 0.563+/-(0.046,0.034)RJ, and an orbital period 3.1853days. The host star is moderately bright (V=13.340+/-0.010mag, K_S=10.976+/-0.026mag) K dwarf 0.849+/-0.027Msun , 0.815+/-(0.049,-0.035)Rsun, metallicity [Fe/H]=+0.250+/-0.080. photometrically quiet to within precision measurements has low RV jitter. HATS-7b...
We report the discovery of HATS-70b, a transiting brown dwarf at deuterium burning limit. HATS-70b has mass Mp=12.9 +1.8/-1.6 Mjup and radius Rp=1.384 +0.079/-0.074 Rjup, residing in close-in orbit with period 1.89 days. The host star is M*=1.78 +/- 0.12 Msun A rotating vsini=40.61 +0.32/-0.35 km/s, enabling us to characterize spectroscopic transit via Doppler tomography. find that like other massive planets dwarfs previously sampled, orbits low projected-obliquity lambda=8.9 +5.6/-4.5 deg....
We report the discovery of HAT-P-54b, a planet transiting late K dwarf star in field 0 NASA K2 mission. combine ground-based photometric light curves with radial velocity measurements to determine physical parameters system. HAT-P-54b has mass , radius 0.944 ± 0.028 and an orbital period days. The effective temperature subsolar metallicity . also detect periodic signal P = 15.6 days 5.6 mmag amplitude curve, which we interpret as due rotation star. that is smaller than 92% known planets...
We report the discovery of HAT-P-56b by HATNet survey, an inflated hot Jupiter transiting a bright F-type star in Field 0 NASA's K2 mission. combine ground-based and follow-up light curves with high precision photometry from K2, as well radial velocities Tillinghast Reflector Echelle Spectrograph on Fred Lawrence Whipple Observatory 1.5 m telescope to determine physical properties this system. has mass 2.18 , radius 1.47 transits its host near-grazing orbit period 2.7908 day. The is among...
The analysis of Proxima Centauri's radial velocities recently led Anglada-Escud\'e et al. (2016) to claim the presence a low mass planet orbiting Sun's nearest star once every 11.2 days. Although a-priori probability that b transits its parent is just 1.5%, potential impact such discovery would be considerable. Independent recent velocity efforts, we observed Centauri for 12.5 days in 2014 and 31 2015 with MOST space telescope. We report here cannot make compelling case our precise...
We present the discovery of transiting exoplanets HAT-P-65b and HAT-P-66b, with orbital periods 2.6055 d 2.9721 d, masses $0.527 \pm 0.083$ M$_{J}$ $0.783 0.057$ inflated radii $1.89 0.13$ R$_{J}$ $1.59^{+0.16}_{-0.10}$ R$_{J}$, respectively. They orbit moderately bright ($V=13.145 0.029$, $V=12.993 0.052$) stars mass $1.212 0.050$ M$_{\odot}$ $1.255^{+0.107}_{-0.054}$ M$_{\odot}$. The are at main sequence turnoff. While it is well known that close-in giant planets correlated their...
We report the discovery of ten transiting extrasolar planets by HATSouth survey. The range in mass from Super-Neptune HATS-62b, with $M_{p} < 0.179 M_{J}$, to Super-Jupiter HATS-66b, = 5.33 and size Saturn HATS-69b, $R_{p} 0.94 R_{J}$, inflated Jupiter HATS-67b, 1.69 R_{J}$. have orbital periods between 1.6092 days (HATS-67b) 7.8180 (HATS-61b). hosts are dwarf stars masses ranging $0.89 M_{\odot}$ (HATS-69) $1.56 (HATS-64), apparent magnitudes $V 12.276 \pm 0.020$ mag (HATS-68) 14.095 0.030$...
Abstract We report the discovery of HATS-71b, a transiting gas giant planet on <?CDATA $P=3.7955$?> day orbit around $G=15.35$?> mag M3 dwarf star. HATS-71 is coolest M star known to host hot Jupiter. The loss light during transits 4.7%, more than in any other confirmed system. was identified as candidate by ground-based HATSouth transit survey. It using photometry, spectroscopy, and imaging, well space-based photometry from NASA Transiting Exoplanet Survey Satellite mission (TIC 234523599)....
We report the discovery of HATS-13b and HATS-14b, which are two hot-Jupiter transiting planets discovered by HATSouth survey. The host stars quite similar to each other (HATS-13: V = 13.9 mag, M⋆ 0.96 M⊙, R⋆ 0.89 R⊙, Teff ≈ 5500 K, [Fe/H] 0.05; HATS-14: 13.8 0.97 0.93 5350 0.33) both orbit around them with a period ~3 days separation ~0.04 au. However, even though they irradiated in way, physical characteristics very different. HATS-13b, mass Mp 0.543 ± 0.072 MJ radius Rp 1.212 0.035 RJ,...
We report the discovery and characterization of a new M-dwarf binary, with component masses radii |$M_1 = 0.244_{-0.003}^{+0.003} \, \mathrm{M}_{\odot }$|, |$R_1 0.261_{-0.009}^{+0.006} \mathrm{R}_{\odot |$M_2 0.179_{-0.001}^{+0.002} |$R_2 0.218 _{-0.011}^{+0.007} orbital period ∼4.1 d. The binary HATS551−027 (LP 837−20) was identified as an eclipsing by HATSouth survey, characterized series high-precision photometric observations eclipse events, spectroscopic determinations atmospheric...
We report the discovery of three moderately high-mass transiting hot Jupiters from HATSouth survey: HATS-22b, HATS-23b and HATS-24b. These planets add to number known in ∼2MJ regime. HATS-22b is a 2.74 ± 0.11 MJ mass |$0.953_{-0.029}^{+0.048}\,R_{\rm J}$| radius planet orbiting V = 13.455 0.040 sub-solar (M* 0.759 0.019 M⊙; R* R⊙) K-dwarf host star on an eccentric (e 0.079 0.026) orbit. This planet's high planet-to-stellar ratio further evidence that migration mechanisms for may rely...
We present the discovery of HAT-P-57b, a P = 2.4653 day transiting planet around mag, K main sequence A8V star with projected rotation velocity . measure radius to be and, based on RV observations, place 95% confidence upper limit its mass Based theoretical stellar evolution models, host has and , respectively. Spectroscopic observations made Keck-I/HIRES during partial transit event show Doppler shadow HAT-P-57b moving across average spectral line profile HAT-P-57, confirming object as...