Explanipedia

HD 222237 b: a long-period super-Jupiter around a nearby star revealed by radial-velocity and <i>Hipparcos–Gaia</i> astrometry Open

Guang-Yao Xiao, Fabo Feng, Stephen A. Shectman, C. G. Tinney, Johanna Teske , et al. · 2024

Giant planets on long-period orbits around the nearest stars are among the easiest to directly image. Unfortunately these planets are difficult to fully constrain by indirect methods, e.g. transit and radial velocity (RV). In this study, w…

Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System Open

Zhexing Li, Stephen R. Kane, Timothy D. Brandt, Tara Fetherolf, Paul Robertson , et al. · 2024

Multiplanet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long ob…

The role of carbon in red giant spectro-seismology Open

Kirsten Banks, Sarah L. Martell, C. G. Tinney, Dennis Stello, Marc Hon , et al. · 2024

Although red clump stars function as reliable standard candles, their surface characteristics (i.e. Teff, log g, and [Fe/H]) overlap with those of red giant branch stars, which are not standard candles. Recent results have revealed that sp…

2MASS J09393548-2448279: the coolest and least luminous brown dwarf binary known? Open

D. Saumon, Adam J. Burgasser, C. G. Tinney, Michael C. Cushing, Mark S. Marley , et al. · 2024

Measurement of the luminosity and atmospheric properties of the T8 brown dwarf 2MASS J09393548-2448279 are presented, based on Spitzer IRAC and IRS mid-infrared observations and IRIS2 ground-based astrometry. We determine log{sub 10} L{sub…

Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System Open

Zhexing Li, Stephen R. Kane, Timothy D. Brandt, Tara Fetherolf, Paul Robertson , et al. · 2024

Multi-planet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long o…

The role of carbon in red giant spectro-seismology Open

Kirsten Banks, Sarah L. Martell, C. G. Tinney, Dennis Stello, Marc Hon , et al. · 2024

Although red clump stars function as reliable standard candles, their surface characteristics (i.e. $T_\text{eff}$, $\log g$, and [Fe/H]) overlap with those of red giant branch stars, which are not standard candles. Recent results have rev…

SEARCHING for BINARY y DWARFS with the GEMINI MULTI-CONJUGATE ADAPTIVE OPTICS SYSTEM (GeMS) Open

Daniela Opitz, C. G. Tinney, Jacqueline K. Faherty, Sarah M. Sweet, Christopher R. Gelino , et al. · 2024

The NASA Wide-field Infrared Survey Explorer (WISE) has discovered almost all the known members of the new class of Y-type brown dwarfs. Most of these Y dwarfs have been identified as isolated objects in the field. It is known that binarie…

TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite Open

Rafael Brahm, Louise D. Nielsen, R.A. Wittenmyer, S. Wang, Joseph E. Rodriguez , et al. · 2023

We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have …

Very regular high-frequency pulsation modes in young intermediate-mass stars Open

T. R. Bedding, Simon J. Murphy, D.R. Hey, Daniel Huber, Tianlin Li , et al. · 2023

Asteroseismology probes the internal structures of stars by using their natural pulsation frequencies1. It relies on identifying sequences of pulsation modes that can be compared with theoretical models, which has been done successfully fo…

TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star Open

A. Jordán, A. Jordán, Rafael Brahm, Rafael Brahm, Rafael Brahm , et al. · 2023

We report the discovery of TOI-677 b, first identified as a candidate in light curves obtained within Sectors 9 and 10 of the Transiting Exoplanet Survey Satellite (TESS) mission and confirmed with radial velocities. TOI-677 b has a mass o…

KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESS Open

Romy Rodríguez Martínez, B. Scott Gaudi, Joseph E. Rodriguez, George Zhou, Jonathan Labadie-Bartz , et al. · 2023

We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT sur…

76 T dwarfs from the UKIDSS LAS: Benchmarks, kinematics and an updated space density Open

Ben Burningham, Chasnini Cardoso, Leigh C. Smith, S. K. Leggett, R. L. Smart , et al. · 2023

We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey(UKIDSS) Large Area Survey (LAS). Near-infrared broad-and narrow-band photometry and spectroscopy are presented for the new objects, along withWide-field Inf…

Spinning up a Daze: TESS Uncovers a Hot Jupiter Orbiting the Rapid Rotator TOI-778 Open

Jake Clark, Brett Addison, Jack Okumura, Sydney Vach, Adriana Errico , et al. · 2023

NASA’s Transiting Exoplanet Survey Satellite (TESS) mission has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilit…

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions* Open

Katherine Laliotis, Jennifer Burt, Eric E. Mamajek, Zhexing Li, V. Perdelwitz , et al. · 2023

Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6 m class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high-priority goal of the Astro2020 Decadal Survey. To prepare for fu…

A sub-Neptune transiting the young field star HD 18599 at 40 pc Open

Jerome de Leon, John H. Livingston, J. S. Jenkins, José I Vines, Robert A. Wittenmyer , et al. · 2023

Transiting exoplanets orbiting young nearby stars are ideal laboratories for testing theories of planet formation and evolution. However, to date only a handful of stars with age <1 Gyr have been found to host transiting exoplanets. Her…

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions Open

Katherine Laliotis, Jennifer Burt, Eric E. Mamajek, Zhexing Li, V. Perdelwitz , et al. · 2023

Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6-m-class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high priority goal of the Astro2020 Decadal Survey. To prepare for fu…

TOI 560: Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS, and HIRES RVs Open

Mohammed El Mufti, Peter Plavchan, Howard Isaacson, Bryson Cale, Dax L. Feliz , et al. · 2022

We validate the presence of a two-planet system orbiting the 0.15–1.4 Gyr K4 dwarf TOI 560 (HD 73583). The system consists of an inner moderately eccentric transiting mini-Neptune (TOI 560 b, days, , …

A sub-Neptune transiting the young field star HD 18599 at 40 pc Open

Jerome de Leon, John H. Livingston, J. S. Jenkins, José I Vines, Robert A. Wittenmyer , et al. · 2022

Transiting exoplanets orbiting young nearby stars are ideal laboratories for testing theories of planet formation and evolution. However, to date only a handful of stars with age <1 Gyr have been found to host transiting exoplanets. Here w…

A dense mini-Neptune orbiting the bright young star HD 18599 Open

José I Vines, J. S. Jenkins, Z. M. Berdiñas, M. G. Soto, Matías R. Díaz , et al. · 2022

Very little is known about the young planet population because the detection of small planets orbiting young stars is obscured by the effects of stellar activity and fast rotation, which mask planets within radial velocity and transit data…

The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at ≈2 au Open

Yunlin Zeng, Timothy D. Brandt, Gongjie Li, Trent J. Dupuy, Yiting Li , et al. · 2022

Gliese 86 is a nearby K dwarf hosting a giant planet on a ≈16 day orbit and an outer white dwarf companion on a ≈century-long orbit. In this study we combine radial velocity data (including new measurements spanning more than a decade) wit…

3D Selection of 167 Substellar Companions to Nearby Stars Open

Fabo Feng, R. Paul Butler, Steven S. Vogt, Matthew S. Clement, C. G. Tinney , et al. · 2022

We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous work. We find 914 radial velocity signals with periods l…

Minerva-Australis. I. Design, Commissioning, and First Photometric Results Open

Brett Addison, D. J. Wright, Robert A. Wittenmyer, Jonathan Horner, Matthew W. Mengel , et al. · 2022

© 2019. The Astronomical Society of the Pacific. All rights reserved. Printed in the U.S.A. The MINERVA-Australis telescope array is a facility dedicated to the follow-up, confirmation, characterization, and mass measurement of planets orb…

FIESTA II. Disentangling Stellar and Instrumental Variability from Exoplanetary Doppler Shifts in the Fourier Domain Open

Jinglin Zhao, Eric B. Ford, C. G. Tinney · 2022

The radial velocity (RV) detection of exoplanets is challenged by stellar spectroscopic variability that can mimic the presence of planets and by instrumental instability that can further obscure the detection. Both stellar and instrumenta…

The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets Open

Samuel W. Yee, J. D. Hartman, Joseph E. Rodriguez, George Zhou, Samuel N. Quinn , et al. · 2022

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, presen…

HD 83443c: A Highly Eccentric Giant Planet on a 22 yr Orbit Open

Adriana Errico, Robert A. Wittenmyer, Jonathan Horner, Zhexing Li, G. Mirek Brandt , et al. · 2022

We report the discovery of a highly eccentric long-period Jovian planet orbiting the hot-Jupiter host HD 83443. By combining radial velocity data from four instruments (AAT/UCLES, Keck/HIRES, HARPS, Minerva-Australis) spanning more than tw…

HD 83443c: A highly eccentric giant planet on a 22-year orbit Open

Adriana Errico, Robert A. Wittenmyer, Jonathan Horner, Zhexing Li, Gregory Mirek Brandt , et al. · 2022

We report the discovery of a highly eccentric long-period Jovian planet orbiting the hot-Jupiter host HD\,83443. By combining radial velocity data from four instruments (AAT/UCLES, Keck/HIRES, HARPS, Minerva-Australis) spanning more than t…

The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at $\approx$2 AU Open

Yunlin Zeng, Timothy D. Brandt, Gongjie Li, Trent J. Dupuy, Yiting Li , et al. · 2021

Gliese 86 is a nearby K dwarf hosting a giant planet on a $\approx$16-day orbit and an outer white dwarf companion on a $\approx$century-long orbit. In this study we combine radial velocity data (including new measurements spanning more th…

TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion Open

Ashley Chontos, Daniel Huber, Travis A. Berger, H. Kjeldsen, Aldo Serenelli , et al. · 2021

Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than …

Transits of Known Planets Orbiting a Naked-eye Star Open

Stephen R. Kane, Selçuk Yalçınkaya, H. P. Osborn, Paul A. Dalba, Louise D. Nielsen , et al. · 2021

Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that …

Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602 Open

Luke G. Bouma, J. D. Hartman, Rafael Brahm, Phil Evans, K. A. Collins , et al. · 2021

© 2020. The American Astronomical Society. All rights reserved. We report the discovery of TOI 837b and its validation as a transiting planet. We characterize the system using data from the NASA Transiting Exoplanet Survey Satellite missio…

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