Search Publications
The Breakthrough Listen Search for Intelligent Life: A Laser Search Pipeline for the Automated Planet Finder
Croft, Steve; Isaacson, Howard; Siemion, Andrew +4 more
The Search for Extraterrestrial Intelligence has traditionally been conducted at radio wavelengths, but optical searches are well-motivated and increasingly feasible due to the growing availability of high-resolution spectroscopy. We present a data analysis pipeline to search Automated Planet Finder (APF) spectroscopic observations from the Levy S…
Detection of Strongly Lensed Arcs in Galaxy Clusters with Transformers
Li, Nan; Luo, Rui; Jia, Peng +4 more
Strong lensing in galaxy clusters probes properties of dense cores of dark matter halos in mass, studies the distant universe at flux levels and spatial resolutions otherwise unavailable, and constrains cosmological models independently. The next-generation large-scale sky imaging surveys are expected to discover thousands of cluster-scale strong …
Disk or Companion: Characterizing Excess Infrared Flux in Seven White Dwarf Systems with Near-infrared Spectroscopy
Zuckerman, B.; Manjavacas, Elena; Dufour, Patrick +7 more
Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwarfs with infrared excesses identified in previous studies. We confirmed the presence of dust disks a…
Revisiting the Transit Timing and Atmosphere Characterization of the Neptune-mass Planet HAT-P-26 b
McDonald, Iain; Dhillon, Vik S.; A-thano, Napaporn +11 more
We present a transit-timing variation (TTV) and planetary atmosphere analysis of the Neptune-mass planet HAT-P-26 b. We present a new set of 13 transit light curves from optical ground-based observations and combine them with light curves from the Wide Field Camera 3 on the Hubble Space Telescope, the Transiting Exoplanet Survey Satellite, and pre…
Spectroscopic Confirmation of a Population of Isolated, Intermediate-mass Young Stellar Objects
Zucker, Catherine; Hillenbrand, Lynne A.; Povich, Matthew S. +9 more
Wide-field searches for young stellar objects (YSOs) can place useful constraints on the prevalence of clustered versus distributed star formation. The Spitzer/IRAC Candidate YSO (SPICY) catalog is one of the largest compilations of such objects (~120,000 candidates in the Galactic midplane). Many SPICY candidates are spatially clustered, but, per…
Revising Properties of Planet-Host Binary Systems. III. There Is No Observed Radius Gap for Kepler Planets in Binary Star Systems
Huber, Daniel; Berger, Travis A.; Gaidos, Eric +7 more
Binary stars are ubiquitous; the majority of solar-type stars exist in binaries. Exoplanet occurrence rate is suppressed in binaries, but some multiples do still host planets. Binaries cause observational biases in planet parameters, with undetected multiplicity causing transiting planets to appear smaller than they truly are. We have analyzed the…
Three Warm Jupiters around Solar-analog Stars Detected with TESS
Trifonov, Trifon; Henning, Thomas; Triaud, Amaury H. M. J. +32 more
We report the discovery and characterization of three giant exoplanets orbiting solar-analog stars, detected by the TESS space mission and confirmed through ground-based photometry and radial velocity measurements taken at La Silla observatory with FEROS. TOI-2373 b is a warm Jupiter orbiting its host star every ~13.3 days, and is one of the most …
Stability and Detectability of Exomoons Orbiting HIP 41378 f, a Temperate Jovian Planet with an Anomalously Low Apparent Density
Vanderburg, Andrew; Kirk, James; López-Morales, Mercedes +21 more
Moons orbiting exoplanets ("exomoons") may hold clues about planet formation, migration, and habitability. In this work, we investigate the plausibility of exomoons orbiting the temperate (T eq = 294 K) giant (R = 9.2 R ⊕) planet HIP 41378 f, which has been shown to have a low apparent bulk density of 0.09 g cm-3 a…
No Evidence for More Earth-sized Planets in the Habitable Zone of Kepler's M versus FGK Stars
Pascucci, Ilaria; Christiansen, Jessie L.; Mulders, Gijs D. +3 more
Reliable detections of Earth-sized planets in the habitable zone remain elusive in the Kepler sample, even for M dwarfs. The Kepler sample was once thought to contain a considerable number of M-dwarf stars (T eff < 4000 K), which hosted enough Earth-sized ([0.5, 1.5] R ⊕) planets to estimate their occurrence rate (η ⊕…
Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems
Butler, R. Paul; Jordán, Andrés; Brahm, Rafael +18 more
The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin-orbit orientations of these systems inform the typical outcomes of quiescent planet formation, as well as the primord…