Michael B. Lund
A5024066348- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Scientific Research and Discoveries
- Astrophysical Phenomena and Observations
- High-pressure geophysics and materials
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
- Health and Medical Research Impacts
- Spacecraft and Cryogenic Technologies
- Space Exploration and Technology
- History and Developments in Astronomy
- Planetary Science and Exploration
- Radio Astronomy Observations and Technology
- Historical Astronomy and Related Studies
- Isotope Analysis in Ecology
- Cosmology and Gravitation Theories
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Pulsars and Gravitational Waves Research
- Technology Assessment and Management
NASA Exoplanet Science Institute
2019-2025
California Institute of Technology
2019-2025
Search for Extraterrestrial Intelligence
2024
Centre National de la Recherche Scientifique
2024
Institut d'Astrophysique de Paris
2024
Infrared Processing and Analysis Center
2020-2021
Medical College of Wisconsin
2020
Vanderbilt University
2014-2019
Lehigh University
2015
We present 2,241 exoplanet candidates identified with data from the Transiting Exoplanet Survey Satellite (TESS) during its two-year prime mission. list these in TESS Objects of Interest (TOI) Catalog, which includes both new planet found by and previously-known planets recovered observations. describe process used to identify TOIs investigate characteristics candidates, discuss some notable discoveries. The TOI Catalog an unprecedented number small around nearby bright stars, are...
The Large Synoptic Survey Telescope is designed to provide an unprecedented optical imaging dataset that will support investigations of our Solar System, Galaxy and Universe, across half the sky over ten years repeated observation. However, exactly how LSST observations be taken (the observing strategy or "cadence") not yet finalized. In this dynamically-evolving community white paper, we explore detailed performance anticipated science expected depend on small changes strategy. Using...
Abstract The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite ( TESS ) once again demonstrates with the discovery its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in 36 day orbit around bright V = 8.1) nearby (16 pc) K4.5 dwarf. measures be R ⊕ , and combined archival follow-up precision radial velocity data put mass at M . contributes Level 1 Science Requirement providing 50 transiting planets smaller than 4...
Abstract NASA’s Transiting Exoplanet Survey Satellite (TESS) mission promises to improve our understanding of hot Jupiters by providing an all-sky, magnitude-limited sample transiting suitable for population studies. Assembling such a requires confirming hundreds planet candidates with additional follow-up observations. Here we present 20 that were detected using TESS data and confirmed be planets through photometric, spectroscopic, imaging observations coordinated the Follow-up Observing...
Abstract Stellar multiplicity is correlated with many stellar properties, yet measurements have proven difficult for the M dwarfs—the most common type of star in our galaxy—due to their faintness and fact that a reasonably complete inventory later dwarfs did not exist until recently. We therefore carried out Pervasive Overview “Kompanions” Every dwarf Our Neighborhood (POKEMON) survey, which made use Differential Speckle Survey Instrument on 4.3 m Lowell Discovery Telescope, along NN-EXPLORE...
Abstract JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5000 confirmed planets, more than 4000 Transiting Exoplanet Survey Satellite (TESS) planet candidates still unconfirmed and many the best planets for atmospheric characterization may remain be identified. We present a sample TESS that we identify as “best-in-class” transmission emission spectroscopy with JWST. These targets sorted into bins across equilibrium...
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with 2.02-d orbit around $V$ = 10.5, F1V star [Fe/H] 0.1 $\pm$ 0.1. The 1.5 R$_{\rm Jup}$ planet was confirmed by Doppler tomography stellar line profiles during transit. place limit $<$ 8 M$_{\rm on its mass. is in retrograde sky-projected spin-orbit angle $\lambda -165^{\circ} \pm 5^{\circ}$. This agreement known tendency for orbits hotter stars to be more likely misaligned. WASP-167/KELT-13 one few...
Abstract We announce the discovery of KELT-16b, a highly irradiated, ultra-short period hot Jupiter transiting relatively bright ( V = 11.7) star TYC 2688-1839-1/KELT-16. A global analysis system shows KELT-16 to be an F7V with <?CDATA ${T}_{\mathrm{eff}}=6236\pm 54$?> K, $\mathrm{log}{g}_{\star }={4.253}_{-0.036}^{+0.031}$?> , $[\mathrm{Fe}/{\rm{H}}]=-{0.002}_{-0.085}^{+0.086}$?> ${M}_{\star }={1.211}_{-0.046}^{+0.043}\,{M}_{\odot }$?> and ${R}_{\star }\,={1.360}_{-0.053}^{+0.064}{R}_{\odot...
We present the discovery of KELT-21b, a hot Jupiter transiting $V=10.5$ A8V star HD 332124. The planet has an orbital period $P=3.6127647\pm0.0000033$ days and radius $1.586_{-0.040}^{+0.039}$ $R_J$. set upper limit on planetary mass $M_P<3.91$ $M_J$ at $3\sigma$ confidence. confirmed nature companion using this Doppler tomographic observations to verify that transits These data also demonstrate orbit is well-aligned with stellar spin, sky-projected spin-orbit misalignment...
We report the first discovery of a transiting circumbinary planet detected from single sector TESS data. During Sector 21, TIC 172900988b transited primary star and then 5 days later it secondary star. The binary is itself eclipsing, with period P = 19.7 an eccentricity e 0.45. Archival data ASAS-SN, Evryscope, KELT, SuperWASP reveal prominent apsidal motion orbit, caused by dynamical interactions between planet. A comprehensive photodynamical analysis TESS, archival follow-up yields stellar...
ABSTRACT HIP 9618 (HD 12572, TOI-1471, TIC 306263608) is a bright (G = 9.0 mag) solar analogue. TESS photometry revealed the star to have two candidate planets with radii of 3.9 ± 0.044 R⊕ (HIP b) and 3.343 0.039 c). While 20.77291 d period b was measured unambiguously, c showed only transits separated by 680-d gap in time series, leaving many possibilities for period. To solve this issue, CHEOPS performed targeted aliases attempt recover true planet c, successfully determined be 52.56349 d....
Abstract The Vera C. Rubin Legacy Survey of Space and Time (LSST) holds the potential to revolutionize time domain astrophysics, reaching completely unexplored areas Universe mapping variability scales from minutes a decade. To prepare maximize LSST data for exploration transient variable Universe, one four pillars science, Transient Variable Stars Science Collaboration, eight Collaborations, has identified research interest requirements, paths enable them. While our roadmap is...
Abstract The Transiting Exoplanet Survey Satellite (TESS) has discovered hundreds of new worlds, with TESS planet candidates now outnumbering the total number confirmed planets from Kepler. Owing to differences in survey design, continues provide that are better suited for subsequent follow-up studies, including mass measurement through radial velocity (RV) observations, compared Kepler targets. In this work, we present TESS-Keck Survey’s (TKS) Mass Catalog: a uniform analysis all TKS RV...
We report on the confirmation and follow-up characterization of two long-period transiting substellar companions low-eccentricity orbits around TIC 4672985 TOI-2529, whose transit events were detected by TESS space mission. Ground-based photometric spectroscopic from different facilities, confirmed nature b , a massive gas giant in transition between super-Jupiters brown dwarfs mass regime. From joint analysis we derived following orbital parameters: P = 69.0480 −0.0005 +0.0004 d, M p 12.74...
Abstract TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R ⊕ ) with orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine planet’s mass to be 1.44 0.14 M . The just outside Roche limit, P orb / = 1.13 0.10. strong tidal force likely deforms into a triaxial ellipsoid long axis that ∼10% longer than short axis. Assuming reduced stellar quality factor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Abstract We present the discovery of TOI-7041 b (TIC 201175570 b), a hot Saturn transiting red giant star with measurable stellar oscillations. observe solar-like oscillations in frequency maximum power <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>ν</mml:mi> </mml:mrow> <mml:mi mathvariant="normal">max</mml:mi> </mml:msub> <mml:mspace width="0.25em"/> <mml:mo>=</mml:mo> </mml:math> 218.50 ± 2.23 μ Hz and large separation Δ ν =...
We announce the discovery of a highly inflated transiting hot Jupiter by KELT-North survey. A global analysis including constraints from isochrones indicates that V = 10.8 host star (HD 343246) is mildly evolved, G dwarf with K, , an inferred mass and radius . The planetary companion has MJ, RJ, surface gravity density g cm−3. planet on roughly circular orbit semimajor axis AU eccentricity best-fit linear ephemeris days. This one most all known exoplanets, making it few members class...
ABSTRACT We report the discovery of KELT-14b and KELT-15b, two hot Jupiters from KELT-South survey. KELT-14b, an independent recently announced WASP-122b, is inflated Jupiter mass planet that orbits a <?CDATA $\sim {5.0}_{-0.7}^{+0.3}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>∼</mml:mo> <mml:msubsup> <mml:mrow> <mml:mn>5.0</mml:mn> </mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.7</mml:mn> <mml:mo>+</mml:mo> <mml:mn>0.3</mml:mn> </mml:msubsup>...
We report the discovery of TOI-561, a multi-planet system in galactic thick disk that contains rocky, ultra-short period planet (USP). This bright ($V=10.2$) star hosts three small transiting planets identified photometry from NASA TESS mission: TOI-561 b (TOI-561.02, P=0.44 days, $R_b = 1.45\pm0.11\,R_\oplus$), c (TOI-561.01, P=10.8 $R_c=2.90\pm0.13\,R_\oplus$), and d (TOI-561.03, P=16.3 $R_d=2.32\pm0.16\,R_\oplus$). The is chemically ([Fe/H]$=-0.41\pm0.05$, [$\alpha$/H]$=+0.23\pm0.05$)...
We report the discovery of two planetary systems around comoving stars; TOI-2076 (TIC 27491137) and TOI-1807 180695581). is a nearby (41.9 pc) multi-planetary system orbiting young (204$\pm$50 Myr), bright (K = 7.115 in TIC v8.1). hosts single transiting planet, similarly (42.58pc), (180$\pm$40 bright. Both targets exhibit significant, periodic variability due to star spots, characteristic their ages. Using photometric data collected by TESS we identify three planets with radii...
We report the discovery of TOI-2180 b, a 2.8 $M_{\rm J}$ giant planet orbiting slightly evolved G5 host star. This transited only once in Cycle 2 primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified 24 hr single-transit event shortly after data were released, allowing Doppler monitoring campaign with Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined orbital period b be 260.8$\pm$0.6 days,...
ABSTRACT We present the discovery and characterization of six short-period, transiting giant planets from NASA’s Transiting Exoplanet Survey Satellite (TESS) -- TOI-1811 (TIC 376524552), TOI-2025 394050135), TOI-2145 88992642), TOI-2152 395393265), TOI-2154 428787891), TOI-2497 97568467). All orbit bright host stars (8.9 &lt;G &lt; 11.8, 7.7 &lt;K 10.1). Using a combination time-series photometric spectroscopic follow-up observations TESS Follow-up Observing Program Working...
Abstract Transiting giant exoplanets around M-dwarf stars (GEMS) are rare, owing to the low-mass host stars. However, all-sky coverage of TESS has enabled detection an increasingly large number them enable statistical surveys like Searching for GEMS survey. As part this endeavor, we describe observations six transiting planets, which include precise mass measurements two (K2-419Ab, TOI-6034b) and validation four systems, includes upper limits three (TOI-5218b, TOI-5616b, TOI-5634Ab), while...