ORCID Profile
0000-0001-8732-6166
Current Organisations
Tarbiat Modares University Faculty of Basic Sciences
,
Princeton University
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Publications
A Discrete Set of Possible Transit Ephemerides for Two Long-period Gas Giants Orbiting HIP 41378
Publisher: American Astronomical Society
Date: 20-12-0002
HAT-P-68b: A Transiting Hot Jupiter around a K5 Dwarf Star
Publisher: American Astronomical Society
Date: 14-01-2021
HATS-6b: A WARM SATURN TRANSITING AN EARLY M DWARF STAR, AND A SET OF EMPIRICAL RELATIONS FOR CHARACTERIZING K AND M DWARF PLANET HOSTS
Publisher: American Astronomical Society
Date: 28-04-2015
No Conclusive Evidence for Transits of Proxima b inMOSTPhotometry
Publisher: American Astronomical Society
Date: 02-02-2017
Detection of Beat Cepheids in M33 and Their Use as a Probe of the M33 Metallicity Distribution
Publisher: American Astronomical Society
Date: 30-11-2006
DOI: 10.1086/510453
HATS-2b: A transiting extrasolar planet orbiting aK-type star showing starspot activity
Publisher: EDP Sciences
Date: 10-2013
Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS
Publisher: American Astronomical Society
Date: 11-09-2019
A nearly polar orbit for the extrasolar hot jupiter WASP-79b
Publisher: American Astronomical Society
Date: 14-08-2013
HATS-13b and HATS-14b: two transiting hot Jupiters from the HATSouth survey
Publisher: EDP Sciences
Date: 08-2015
HAT-P-56b: AN INFLATED MASSIVE HOT JUPITER TRANSITING A BRIGHT F STAR FOLLOWED UP WITHK2CAMPAIGN 0 OBSERVATIONS
Publisher: American Astronomical Society
Date: 25-08-2015
Deep Canada���France���Hawaii Telescope photometric survey of the entire M33 galaxy ��� I. Catalogue of 36���000 variable point sources
Publisher: Oxford University Press (OUP)
Date: 21-09-2006
TOI-954 b and K2-329 b: Short-period Saturn-mass Planets that Test whether Irradiation Leads to Inflation
Publisher: American Astronomical Society
Date: 22-01-2021
HAT-P-27b: A HOT JUPITER TRANSITING A G STAR ON A 3 DAY ORBIT
Publisher: American Astronomical Society
Date: 03-06-2011
A 0.24+0.18 M⊙ double-lined eclipsing binary from the HATSouth survey
Publisher: Oxford University Press (OUP)
Date: 12-06-2015
HATS-74Ab, HATS-75b, HATS-76b, and HATS-77b: Four Transiting Giant Planets Around K and M Dwarfs*
Publisher: American Astronomical Society
Date: 11-02-2022
Abstract: The relative rarity of giant planets around low-mass stars compared with solar-type stars is a key prediction from the core-accretion planet formation theory. In this paper we report on the discovery of four gas giant planets that transit low-mass late K and early M dwarfs. The planets HATS-74Ab (TOI 737b), HATS-75b (TOI 552b), HATS-76b (TOI 555b), and HATS-77b (TOI 730b) were all discovered from the HATSouth photometric survey and follow-up using TESS and other photometric facilities. We use the new ESPRESSO facility at the VLT to confirm systems and measure their masses. We find that these planets have masses of 1.46 ± 0.14 M J, 0.491 ± 0.039 M J, 2.629 ± 0.089 M J, and 1.374 − 0.074 + 0.100 M J, respectively, and radii of 1.032 ± 0.021 R J, 0.884 ± 0.013 R J, 1.079 ± 0.031 R J, and 1.165 ± 0.021 R J, respectively. The planets all orbit close to their host stars with orbital periods ranging from 1.7319 days to 3.0876 days. With further work, we aim to test core-accretion theory by using these and further discoveries to quantify the occurrence rate of giant planets around low-mass host stars.
HATS-18B: AN EXTREME SHORT-PERIOD MASSIVE TRANSITING PLANET SPINNING UP ITS STAR
Publisher: American Astronomical Society
Date: 20-10-2016
HATS-11B AND HATS-12B: TWO TRANSITING HOT JUPITERS ORBITING SUBSOLAR METALLICITY STARS SELECTED FOR THE K2 CAMPAIGN 7
Publisher: American Astronomical Society
Date: 21-09-2016
HATS-71b: A Giant Planet Transiting an M3 Dwarf Star in TESS Sector 1
Publisher: American Astronomical Society
Date: 18-05-2020
HATS-15b and HATS-16b: Two Massive Planets Transiting Old G Dwarf Stars
Publisher: IOP Publishing
Date: 10-06-2016
HATS-70b: A 13 MJ Brown Dwarf Transiting an A Star
Publisher: American Astronomical Society
Date: 02-01-2019
TOI-3235 b: A Transiting Giant Planet around an M4 Dwarf Star
Publisher: American Astronomical Society
Date: 03-2023
Abstract: We present the discovery of TOI-3235 b, a short-period Jupiter orbiting an M dwarf with a stellar mass close to the critical mass at which stars transition from partially to fully convective. TOI-3235 b was first identified as a candidate from TESS photometry and confirmed with radial velocities from ESPRESSO and ground-based photometry from HATSouth, MEarth-South, TRAPPIST-South, LCOGT, and ExTrA. We find that the planet has a mass of 0.665 ± 0.025 M J and a radius of 1.017 ± 0.044 R J . It orbits close to its host star, with an orbital period of 2.5926 days but has an equilibrium temperature of ≈ 604 K, well below the expected threshold for radius inflation of hot Jupiters. The host star has a mass of 0.3939 ± 0.0030 M ☉ , a radius of 0.3697 ± 0.0018 R ☉ , an effective temperature of 3389 K, and a J -band magnitude of 11.706 ± 0.025. Current planet formation models do not predict the existence of gas giants such as TOI-3235 b around such low-mass stars. With a high transmission spectroscopy metric, TOI-3235 b is one of the best-suited giants orbiting M dwarfs for atmospheric characterization.
HATSouth: A Global Network of Fully Automated Identical Wide-Field Telescopes1
Publisher: IOP Publishing
Date: 02-2013
DOI: 10.1086/669529
HATS-8b: A LOW-DENSITY TRANSITING SUPER-NEPTUNE
Publisher: American Astronomical Society
Date: 17-07-2015
HATS-1b: THE FIRST TRANSITING PLANET DISCOVERED BY THE HATSouth SURVEY
Publisher: American Astronomical Society
Date: 21-11-2012
HAT-P-31b,c: A TRANSITING, ECCENTRIC, HOT JUPITER AND A LONG-PERIOD, MASSIVE THIRD BODY
Publisher: American Astronomical Society
Date: 16-08-2011
The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets
Publisher: American Astronomical Society
Date: 27-07-2022
Abstract: Hot Jupiters—short-period giant planets—were the first extrasolar planets to be discovered, but many questions about their origin remain. NASA’s Transiting Exoplanet Survey Satellite (TESS), an all-sky search for transiting planets, presents an opportunity to address these questions by constructing a uniform s le of hot Jupiters for demographic study through new detections and unifying the work of previous ground-based transit surveys. As the first results of an effort to build this large s le of planets, we report here the discovery of 10 new hot Jupiters (TOI-2193A b, TOI-2207b, TOI-2236b, TOI-2421b, TOI-2567b, TOI-2570b, TOI-3331b, TOI-3540A b, TOI-3693b, TOI-4137b). All of the planets were identified as planet candidates based on periodic flux dips observed by TESS, and were subsequently confirmed using ground-based time-series photometry, high-angular-resolution imaging, and high-resolution spectroscopy coordinated with the TESS Follow-up Observing Program. The 10 newly discovered planets orbit relatively bright F and G stars ( G 12.5, T eff between 4800 and 6200 K). The planets’ orbital periods range from 2 to 10 days, and their masses range from 0.2 to 2.2 Jupiter masses. TOI-2421b is notable for being a Saturn-mass planet and TOI-2567b for being a “sub-Saturn,” with masses of 0.322 ± 0.073 and 0.195 ± 0.030 Jupiter masses, respectively. We also measured a detectably eccentric orbit ( e = 0.17 ± 0.05) for TOI-2207b, a planet on an 8 day orbit, while placing an upper limit of e 0.052 for TOI-3693b, which has a 9 day orbital period. The 10 planets described here represent an important step toward using TESS to create a large and statistically useful s le of hot Jupiters.
HATS9-b AND HATS10-b: TWO COMPACT HOT JUPITERS IN FIELD 7 OF THE K2 MISSION
Publisher: American Astronomical Society
Date: 07-07-2015
HAT-P-57b: A SHORT-PERIOD GIANT PLANET TRANSITING A BRIGHT RAPIDLY ROTATING A8V STAR CONFIRMED VIA DOPPLER TOMOGRAPHY
Publisher: American Astronomical Society
Date: 10-12-2015
HATS-54b–HATS-58Ab: Five New Transiting Hot Jupiters Including One with a Possible Temperate Companion
Publisher: American Astronomical Society
Date: 16-07-2019
A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor Member HIP 94235
Publisher: American Astronomical Society
Date: 24-05-2022
Abstract: The Transiting Exoplanet Survey Satellite (TESS) mission has enabled discoveries of the brightest transiting planet systems around young stars. These systems are the benchmarks for testing theories of planetary evolution. We report the discovery of a mini-Neptune transiting a bright star in the AB Doradus moving group. HIP 94235 (TOI-4399, TIC 464646604) is a V mag = 8.31 G-dwarf hosting a 3.00 − 0.28 + 0.32 R ⊕ mini-Neptune in a 7.7 day period orbit. HIP 94235 is part of the AB Doradus moving group, one of the youngest and closest associations. Due to its youth, the host star exhibits significant photometric spot modulation, lithium absorption, and X-ray emission. Three 0.06% transits were observed during Sector 27 of the TESS Extended Mission, though these transit signals are dwarfed by the 2% peak-to-peak photometric variability exhibited by the host star. Follow-up observations with the Characterising Exoplanet Satellite confirmed the transit signal and prevented the erosion of the transit ephemeris. HIP 94235 is part of a 50 au G-M binary system. We make use of diffraction limited observations spanning 11 yr, and astrometric accelerations from Hipparcos and Gaia, to constrain the orbit of HIP 94235 B. HIP 94235 is one of the tightest stellar binaries to host an inner planet. As part of a growing s le of bright, young planet systems, HIP 94235 b is ideal for follow-up transit observations, such as those that investigate the evaporative processes driven by high-energy radiation that may sculpt the valleys and deserts in the Neptune population.
HATS-17b: A TRANSITING COMPACT WARM JUPITER IN A 16.3 DAY CIRCULAR ORBIT
Publisher: American Astronomical Society
Date: 08-03-2016
A HIGH OBLIQUITY ORBIT FOR THE HOT-JUPITER HATS-14b TRANSITING A 5400 K STAR
Publisher: American Astronomical Society
Date: 19-11-2015
The mass–radius relationship for very low mass stars: four new discoveries from the HATSouth Survey★
Publisher: Oxford University Press (OUP)
Date: 11-2013
HAT-P-58b–HAT-P-64b: Seven Planets Transiting Bright Stars*
Publisher: American Astronomical Society
Date: 08-06-2021
Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602
Publisher: American Astronomical Society
Date: 03-11-2020
HATS-31B THROUGH HATS-35B: FIVE TRANSITING HOT JUPITERS DISCOVERED BY THE HATSOUTH SURVEY
Publisher: American Astronomical Society
Date: 14-11-2016
HATS-22b, HATS-23b and HATS-24b: three new transiting super-Jupiters from the HATSouth project
Publisher: Oxford University Press (OUP)
Date: 28-02-2017
DOI: 10.1093/MNRAS/STX500
A hot jupiter in a nearly polar orbit
Publisher: Cambridge University Press (CUP)
Date: 06-2013
DOI: 10.1017/S1743921313009058
Abstract: We measured the spin-orbit misalignment for WASP-79b, a transiting hot Jupiter from the WASP survey. Using the Rossiter-McLaughlin effect during the transit event, we determined the sky-projected obliquity to be λ = −106 +10 −8 ○. This result indicates that the planet is in a nearly polar orbit.
THE HUNT FOR EXOMOONS WITHKEPLER(HEK). V. A SURVEY OF 41 PLANETARY CANDIDATES FOR EXOMOONS
Publisher: American Astronomical Society
Date: 22-10-2015
HATS-3b: AN INFLATED HOT JUPITER TRANSITING AN F-TYPE STAR
Publisher: American Astronomical Society
Date: 27-09-2013
HATS-59b,c: A Transiting Hot Jupiter and a Cold Massive Giant Planet around a Sun-like Star
Publisher: American Astronomical Society
Date: 18-10-2018
The TESS Grand Unified Hot Jupiter Survey. II. Twenty New Giant Planets*
Publisher: American Astronomical Society
Date: 13-02-2023
Abstract: NASA’s Transiting Exoplanet Survey Satellite (TESS) mission promises to improve our understanding of hot Jupiters by providing an all-sky, magnitude-limited s le of transiting hot Jupiters suitable for population studies. Assembling such a s le requires confirming hundreds of planet candidates with additional follow-up observations. Here we present 20 hot Jupiters that were detected using TESS data and confirmed to be planets through photometric, spectroscopic, and imaging observations coordinated by the TESS Follow-up Observing Program. These 20 planets have orbital periods shorter than 7 days and orbit relatively bright FGK stars (10.9 G 13.0). Most of the planets are comparable in mass to Jupiter, although there are four planets with masses less than that of Saturn. TOI-3976b, the longest-period planet in our s le ( P = 6.6 days), may be on a moderately eccentric orbit ( e = 0.18 ± 0.06), while observations of the other targets are consistent with them being on circular orbits. We measured the projected stellar obliquity of TOI-1937A b, a hot Jupiter on a 22.4 hr orbit with the Rossiter–McLaughlin effect, finding the planet’s orbit to be well aligned with the stellar spin axis (∣ λ ∣ = 4.°0 ± 3.°5). We also investigated the possibility that TOI-1937 is a member of the NGC 2516 open cluster but ultimately found the evidence for cluster membership to be ambiguous. These objects are part of a larger effort to build a complete s le of hot Jupiters to be used for future demographic and detailed characterization work.
HATS-37Ab and HATS-38b: Two Transiting Hot Neptunes in the Desert
Publisher: American Astronomical Society
Date: 27-10-2020
Geology, ore facies and sulfur isotopes geochemistry of the Nudeh Besshi-type volcanogenic massive sulfide deposit, southwest Sabzevar basin, Iran
Publisher: Elsevier BV
Date: 08-2016
HATS-7b: A HOT SUPER NEPTUNE TRANSITING A QUIET K DWARF STAR
Publisher: American Astronomical Society
Date: 04-11-2015
HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs
Publisher: American Astronomical Society
Date: 26-03-2020
HATS-36b and 24 Other Transiting/Eclipsing Systems from the HATSouth-K2 Campaign 7 Program
Publisher: American Astronomical Society
Date: 15-02-2018
HATS-60b–HATS-69b: 10 Transiting Planets from HATSouth
Publisher: American Astronomical Society
Date: 18-01-2019
HATS-4b: A DENSE HOT JUPITER TRANSITING A SUPER METAL-RICH G STAR
Publisher: American Astronomical Society
Date: 26-06-2014
HATS-5b: A TRANSITING HOT SATURN FROM THE HATSouth SURVEY
Publisher: American Astronomical Society
Date: 06-05-0011
Image Subtraction Reduction of Open Clusters M35 & NGC 2158 in the K2 Campaign 0 Super Stamp
Publisher: IOP Publishing
Date: 22-02-2017
High-precision photometry forK2Campaign 1
Publisher: Oxford University Press (OUP)
Date: 28-10-2015
HATS-50b through HATS-53b: Four Transiting Hot Jupiters Orbiting G-type Stars Discovered by the HATSouth Survey
Publisher: American Astronomical Society
Date: 22-01-2018
150 new transiting planet candidates from Kepler Q1–Q6 data
Publisher: Oxford University Press (OUP)
Date: 22-12-2012
DOI: 10.1093/MNRAS/STS463
HATS-43b, HATS-44b, HATS-45b, and HATS-46b: Four Short-period Transiting Giant Planets in the Neptune–Jupiter Mass Range
Publisher: American Astronomical Society
Date: 13-02-2018
HATS-25B THROUGH HATS-30B: A HALF–DOZEN NEW INFLATED TRANSITING HOT JUPITERS FROM THE HATSOUTH SURVEY
Publisher: American Astronomical Society
Date: 04-10-2016
HATS-39b, HATS-40b, HATS-41b, and HATS-42b: three inflated hot Jupiters and a super-Jupiter transiting F stars
Publisher: Oxford University Press (OUP)
Date: 20-03-2018
DOI: 10.1093/MNRAS/STY726
Related Organisations
Tarbiat Modares University Faculty Of Basic Sciences
Location: Iran (Islamic Republic of)
Harvard-Smithsonian Center For Astrophysics
Location: United States of America
Related Funding Activities
No related grants have been discovered for Joel Hartman.