Publications (59)
TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets Around M Dwarf Stars and Revised Parameters for Three Others
J. D. Hartman, G. Ã. Bakos, Z. Csubry +62
We present the discovery from the TESS mission of two giant planets transiting M dwarf stars: TOI 4201 b and TOI 5344 b. We also provide precise radial velocity measurements and up…
K2-137 b: an Earth-sized planet in a 4.3-hour orbit around an M-dwarf
A. M. S. Smith, J. Cabrera, Sz. Csizmadia +34
We report the discovery from K2 of a transiting terrestrial planet in an ultra-short-period orbit around an M3-dwarf. K2-137 b completes an orbit in only 4.3 hours, the second-shor…
Breakthrough Listen Follow-up of the Reported Transient Signal Observed at the Arecibo Telescope in the Direction of Ross 128
J. E. Enriquez, A. Siemion, R. Dana +12
We undertook observations with the Green Bank Telescope, simultaneously with the 300m telescope in Arecibo, as a follow-up of a possible flare of radio emission from Ross 128. We r…
WASP-4 is Accelerating Toward the Earth
L. G. Bouma, J. N. Winn, A. W. Howard +4
The orbital period of the hot Jupiter WASP-4b appears to be decreasing at a rate of msec/yr, based on transit-timing measurements spanning 12 years. Proposed expla…
A high obliquity orbit for the hot-Jupiter HATS-14b transiting a 5400K star
G. Zhou, D. Bayliss, J. D. Hartman +8
We report a spin-orbit misalignment for the hot-Jupiter HATS-14b, measuring a projected orbital obliquity of |lambda|= 76 -5/+4 deg. HATS-14b orbits a high metallicity, 5400 K G dw…
Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method
A. Derekas, S. J. Murphy, G. Dalya +14
We started a program to search for companions around hybrid Sct/ Dor stars with the frequency modulation method using Kepler data. Our best candidate was KIC 5709664, wher…
HAT-P-58b -- HAT-P-64b: Seven Planets Transiting Bright Stars
G. Ã. Bakos, J. D. Hartman, W. Bhatti +31
We report the discovery and characterization of 7 transiting exoplanets from the HATNet survey. The planets, which are hot Jupiters and Saturns transiting bright sun-like stars, in…
K2-99 revisited: a non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant
A. M. S. Smith, S. N. Breton, Sz. Csizmadia +29
We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2's Campaign 17 allows us to r…
An ancient extrasolar system with five sub-Earth-size planets
T. L. Campante, T. Barclay, J. J. Swift +38
The chemical composition of stars hosting small exoplanets (with radii less than four Earth radii) appears to be more diverse than that of gas-giant hosts, which tend to be metal-r…
Five planets and an independent confirmation of HD 196885Ab from Lick Observatory
D. A. Fischer, P. Driscoll, H. Isaacson +9
We present time series Doppler data from Lick Observatory that reveal the presence of long-period planetary companions orbiting nearby stars. The typical eccentricity of these mass…
Highest-frequency detection of FRB 121102 at 4-8 GHz using the Breakthrough Listen Digital Backend at the Green Bank Telescope
V. Gajjar, A. P. V. Siemion, D. C. Price +28
We report the first detections of the repeating fast radio burst source FRB 121102 above 5.2 GHz. Observations were performed using the 48 GHz receiver of the Robert C. Byrd Gre…
HATS-15 b and HATS-16 b: Two massive planets transiting old G dwarf stars
S. Ciceri, L. Mancini, T. Henning +28
We report the discovery of HATS-15 b and HATS-16 b, two massive transiting extrasolar planets orbiting evolved ( Gyr) main-sequence stars. The planet HATS-15 b, which is h…
Kepler-62: A five-planet system with planets of 1.4 and 1.6 Earth radii in the Habitable Zone
W. J. Borucki, E. Agol, F. Fressin +62
We present the detection of five planets -- Kepler-62b, c, d, e, and f -- of size 1.31, 0.54, 1.95, 1.61 and 1.41 Earth radii, orbiting a K2V star at periods of 5.7, 12.4, 18.2, 12…
HAT-P-54b: A hot jupiter transiting a 0.64 Msun star in field 0 of the K2 mission
G. Ã. Bakos, J. D. Hartman, W. Bhatti +22
We report the discovery of HAT-P-54b, a planet transiting a late K dwarf star in field 0 of the NASA K2 mission. We combine ground-based photometric light curves with radial veloci…
Kepler and the Behemoth: Three Mini-Neptunes in a 40 Million Year Old Association
L. G. Bouma, R. Kerr, J. L. Curtis +8
Stellar positions and velocities from Gaia are yielding a new view of open cluster dispersal. Here we present an analysis of a group of stars spanning Cepheus to Hercules, hereafte…
Precise and Accurate Mass and Radius Measurements of Fifteen Galactic Red Giants in Detached Eclipsing Binaries
D. M. Rowan, K. Z. Stanek, C. S. Kochanek +9
Precise and accurate mass and radius measurements of evolved stars are crucial to calibrating stellar models. Stars in detached eclipsing binaries (EBs) are excellent potential cal…
Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn-mass companion
E. Knudstrup, D. Gandolfi, G. Nowak +59
We report the discovery and confirmation of the planetary system TOI-1288. This late G dwarf harbours two planets: TOI-1288 b and TOI-1288 c. We combine TESS space-borne and ground…
A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds
J. G. Winters, R. Cloutier, A. A. Medina +79
LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 parsecs. The primary star LTT 1445A (0.257 M_Sun) is known to host the transiting planet LTT 144…
HAT-P-26b: A Low-Density Neptune-Mass Planet Transiting a K Star
J. D. Hartman, G. Ã. Bakos, D. M. Kipping +20
We report the discovery of HAT-P-26b, a transiting extrasolar planet orbiting the moderately bright V=11.744 K1 dwarf star GSC 0320-01027, with a period P = 4.234516 +- 0.000015 d,…
Validation and Initial Characterization of the Long Period Planet Kepler-1654 b
C. A. Beichman, H. A. C. Giles, R. Akeson +12
Fewer than 20 transiting Kepler planets have periods longer than one year. Our early search of the Kepler light curves revealed one such system, Kepler-1654 b (originally KIC~84106…
A hidden population of massive white dwarfs: two spotted K+WD binaries
D. M. Rowan, T. Jayasinghe, M. A. Tucker +10
The identification and characterization of massive () white dwarfs is challenging in part due to their low luminosity. Here we present two candidate single-lin…
The star HIP 41378 potentially misaligned with its cohort of long-period planets
S. Grouffal, A. Santerne, V. Bourrier +29
The obliquity between the stellar spin axis and the planetary orbit, detected via the Rossiter-McLaughlin (RM) effect, is a tracer of the formation history of planetary systems. Wh…
HAT-P-15b: A 10.9-day Extrasolar Planet Transiting a Solar-type Star
G. Kovács, G. Ã. Bakos, J. D. Hartman +16
We report the discovery of HAT-P-15b, a transiting extrasolar planet in the `period valley', a relatively sparsely-populated period regime of the known extrasolar planets. The host…
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star
G. Ã. Bakos, K. Penev, D. Bayliss +25
IW ../submit_V2/abstract.txt ( Row 1 Col 1 6:48 Ctrl-K H for help We report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120+/-0.01…
A Fast Radio Burst with frequency-dependent polarization detected during Breakthrough Listen observations
D. C. Price, G. Foster, M. Geyer +30
Here, we report on the detection and verification of Fast Radio Burst FRB 180301, which occurred on UTC 2018 March 1 during the Breakthrough Listen observations with the Parkes tel…
The California Planet Survey III. A Possible 2:1 Resonance in the Exoplanetary Triple System HD 37124
J. T. Wright, Dimitri Veras, Eric B. Ford +8
We present new radial velocities from Keck Observatory and both Newtonian and Keplerian solutions for the triple-planet system orbiting HD 37124. The orbital solution for this syst…
The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc
R. Luque, B. J. Fulton, M. Kunimoto +64
We report the discovery of a multi-planetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655…
Planet-star interactions with precise transit timing. II. The radial-velocity tides and a tighter constraint on the orbital decay rate in the WASP-18 system
G. Maciejewski, H. A. Knutson, A. W. Howard +4
From its discovery, the WASP-18 system with its massive transiting planet on a tight orbit was identified as a unique laboratory for studies on tidal planet-star interactions. In a…
The young HD 73583 (TOI-560) planetary system: Two 10-M mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
O. Barragán, D. J. Armstrong, D. Gandolfi +103
We present the discovery and characterisation of two transiting planets observed by \textit{TESS} in the light curves of the young and bright (V=9.67) star HD73583 (TOI-560). We pe…
EPIC 220204960: A Quadruple Star System Containing Two Strongly Interacting Eclipsing Binaries
S. Rappaport, A. Vanderburg, T. Borkovits +15
We present a strongly interacting quadruple system associated with the K2 target EPIC 220204960. The K2 target itself is a Kp = 12.7 magnitude star at Teff ~ 6100 K which we design…
A super-Earth and a sub-Neptune orbiting the bright, quiet M3 dwarf TOI-1266
B. -O. Demory, F. J. Pozuelos, Y. Gomez Maqueo Chew +70
We report the discovery and characterisation of a super-Earth and a sub-Neptune transiting the bright (), quiet, and nearby (37 pc) M3V dwarf TOI-1266. We validate the plane…
HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field
G. Ã. Bakos, G. Torres, A. Pál +21
We report on the discovery of HAT-P-11b, the smallest radius transiting extrasolar planet (TEP) discovered from the ground, and the first hot Neptune discovered to date by transit…
A Unicorn in Monoceros: the dark companion to the bright, nearby red giant V723 Mon is a non-interacting, mass-gap black hole candidate
T. Jayasinghe, K. Z. Stanek, Todd A. Thompson +18
We report the discovery of the closest known black hole candidate as a binary companion to V723 Mon. V723 Mon is a nearby (), bright (~mag), evolved (…
HD207897 b: A dense sub-Neptune transiting a nearby and bright K-type star
N. Heidari, I. Boisse, J. Orell-Mique +90
We present the discovery and characterization of a transiting sub-Neptune orbiting with a 16.20 day period around a nearby (28 pc) and bright(V=8.37) K0V star HD207897 (TOI-1611).…
The CARMENES search for exoplanets around M dwarfs -- LP 714-47b (TOI 442.01): Populating the Neptune desert
S. Dreizler, I., J. +134
We report the discovery of a Neptune-like planet (LP 714-47 b, P = 4.05204 d, m_b = 30.8 +/- 1.5 M_earth , R_b = 4.7 +/- 0.3 R_earth ) located in the 'hot Neptune desert'. Confirma…
KIC 8164262: a Heartbeat Star Showing Tidally Induced Pulsations with Resonant Locking
K. Hambleton, J. Fuller, S. Thompson +8
We present the analysis of KIC 8164262, a heartbeat star with a high-amplitude (~1 mmag), tidally resonant pulsation (a mode in resonance with the orbit) at 229 times the orbital f…
TOI-1416: A system with a super-Earth planet with a 1.07d period
H. J. Deeg, I. Y. Georgieva, G. Nowak +49
TOI 1416 (BD+42 2504, HIP 70705) is a V=10 late G or early K-type dwarf star with transits detected by TESS. Radial velocities verify the presence of the transiting planet TOI-1416…
TOI-1268b: the youngest, hot, Saturn-mass transiting exoplanet
J. Å ubjak, M. Endl, P. Chaturvedi +41
We report the discovery of TOI-1268b, a transiting Saturn-mass planet from the TESS space mission. With an age of less than one Gyr, derived from various age indicators, TOI-1268b…
HATS-8b: A Low-Density Transiting Super-Neptune
D. Bayliss, J. D. Hartman, G. Ã. Bakos +23
HATS-8b is a low density transiting super-Neptune discovered as part of the HATSouth project. The planet orbits its solar-like G dwarf host (V=14.03 0.10 and T =5679…
Two Exoplanets Discovered at Keck Observatory
J. A. Valenti, D. A. Fischer, G. W. Marcy +6
We present two exoplanets detected at Keck Observatory. HD 179079 is a G5 subgiant that hosts a hot Neptune planet with Msini = 27.5 M_earth in a 14.48 d, low-eccentricity orbit. T…
TOI-1801 b: A temperate mini-Neptune around a young M0.5 dwarf
M. MallorquÃn, E. Goffo, E. Pallé +79
We report the discovery, mass, and radius determination of TOI-1801 b, a temperate mini-Neptune around a young M dwarf. TOI-1801 b was observed in TESS sectors 22 and 49, and the a…
The K2-ESPRINT Project. I. Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading Tail
R. Sanchis-Ojeda, S. Rappaport, E. Pallé +28
We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from 0…
The Jupiter Twin HD 154345b
J. T. Wright, G. W. Marcy, R. P. Butler +4
We announce the discovery of a twin of Jupiter orbiting the slightly metal-poor ([Fe/H] = -0.1) nearby (d = 18 pc) G8 dwarf HD 154345. This planet has a minimum mass of 0.95 Jupite…
The "Giraffe": Discovery of a stripped red giant in an interacting binary with a lower giant
T. Jayasinghe, Todd A. Thompson, C. S. Kochanek +13
We report the discovery of a stripped giant + lower giant binary, 2M04123153+6738486 (2M0412), identified during a search for non-interacting compact object-star binaries. 2M0412 i…
An extremely low-density and temperate giant exoplanet
A. Santerne, L. Malavolta, M. R. Kosiarek +68
Transiting extrasolar planets are key objects in the study of the formation, migration, and evolution of planetary systems. In particular, the exploration of the atmospheres of gia…
Breakthrough Listen Observations of 1I/'Oumuamua with the GBT
J. E. Enriquez, A. Siemion, T. J. W. Lazio +10
We have conducted a search for radio emission consistent with an artificial source targeting 1I/'Oumuamua with the Robert C. Byrd Green Bank Telescope (GBT) between 1.1 and 11.6 GH…
Asteroseismic determination of obliquities of the exoplanet systems Kepler-50 and Kepler-65
W. J. Chaplin, R. Sanchis-Ojeda, T. L. Campante +26
Results on the obliquity of exoplanet host stars -- the angle between the stellar spin axis and the planetary orbital axis -- provide important diagnostic information for theories…
Confirmation and characterisation of three giant planets detected by TESS from the FIES/NOT and Tull/McDonald spectrographs
E. Knudstrup, L. M. Serrano, D. Gandolfi +37
We report the confirmation and characterisation of TOI-1820~b, TOI-2025~b, and TOI-2158~b, three Jupiter-sized planets on short-period orbits around G-type stars detected by TESS.…
The Kepler Follow-Up Observation Program. II. Stellar Parameters from Medium- and High-Resolution Spectroscopy
E. Furlan, D. R. Ciardi, W. D. Cochran +22
We present results from spectroscopic follow-up observations of stars identified in the Kepler field and carried out by teams of the Kepler Follow-Up Observation Program. Two sampl…
A 38 Million Year Old Neptune-Sized Planet in the Kepler Field
L. G. Bouma, J. L. Curtis, K. Masuda +12
Kepler 1627A is a G8V star previously known to host a 3.8 Earth-radius planet on a 7.2 day orbit. The star was observed by the Kepler space telescope because it is nearby (d=329 pc…
HR 10: A main-sequence binary with circumstellar envelopes around both components. Discovery and analysis
B. Montesinos, C. Eiroa, J. Lillo-Box +16
This paper is framed within a large project devoted to studying the presence of circumstellar material around main sequence stars, and looking for exocometary events. The work conc…
Independent confirmation and refined parameters of the hot Jupiter XO-5b
A. Pál, G. Ã. Bakos, J. Fernandez +14
We present HATNet observations of XO-5b, confirming its planetary nature based on evidence beyond that described in the announcement of Burke et al. (2008), namely, the lack of sig…
KOI-3158: The oldest known system of terrestrial-size planets
T. L. Campante, T. Barclay, J. J. Swift +38
The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. Whil…
Photodynamical analysis of the triply eclipsing hierarchical triple system EPIC 249432662
T. Borkovits, S. Rappaport, T. Kaye +16
Using Campaign 15 data from the K2 mission, we have discovered a triply-eclipsing triple star system: EPIC 249432662. The inner eclipsing binary system has a period of 8.23 days, w…
HAT-P-57b: A Short-Period Giant Planet Transiting A Bright Rapidly Rotating A8V Star Confirmed Via Doppler Tomography
J. D. Hartman, G. Ã. Bakos, L. A. Buchhave +24
We present the discovery of HAT-P-57b, a P = 2.4653 day transiting planet around a V = 10.465 +- 0.029 mag, Teff = 7500 +- 250 K main sequence A8V star with a projected rotation ve…
HAT-P-67b: An Extremely Low Density Saturn Transiting an F-Subgiant Confirmed via Doppler Tomography
G. Zhou, G. Ã. Bakos, J. D. Hartman +29
We report the discovery of HAT-P-67b, a hot-Saturn transiting a rapidly rotating F-subgiant. HAT-P-67b has a radius of Rp = 2.085 -0.071/+0.096 RJ,, orbiting a M* = 1.642 -0.072/+0…
Quiet, but not silent. The X-ray activity of the Maunder minimum star HD 166620
M. M. Bennedik, B. Stelzer, H. Isaacson +3
As the only known unambiguous star in a Maunder minimum-like chromospheric activity state, the properties of HD 166620 can provide valuable insight into the behaviour of the Sun du…
Precise Radial Velocities of 2046 Nearby FGKM Stars and 131 Standards
C. Chubak, G. Marcy, D. A. Fischer +4
We present radial velocities with an accuracy of 0.1 km/s for 2046 stars of spectral type F,G,K, and M, based on 29000 spectra taken with the Keck I telescope. We also present 131…
Tango of celestial dancers: A sample of detached eclipsing binary systems containing g-mode pulsating components. A case study of KIC9850387
S. Sekaran, A. Tkachenko, M. Abdul-Masih +9
Eclipsing binary systems with components that pulsate in gravity modes ( modes) allow for simultaneous and independent constraints of the chemical mixing profiles of stars. We a…