Search Results - "Howard, Andrew W."

Observed Properties of Extrasolar Planets by Howard, Andrew W.

“…Observational surveys for extrasolar planets probe the diverse outcomes of planet formation and evolution. These surveys measure the frequency of planets with…”
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Prevalence of Earth-size planets orbiting Sun-like stars by Petigura, Erik A., Howard, Andrew W., Marcy, Geoffrey W.

“…Determining whether Earth-like planets are common or rare looms as a touchstone in the question of life in the universe. We searched for Earth-size planets…”
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Limits on Planetary Companions from Doppler Surveys of Nearby Stars by Howard, Andrew W., Fulton, Benjamin J.

“…Most of our knowledge of planets orbiting nearby stars comes from Doppler surveys. For spaced-based, high-contrast imaging missions, nearby stars with…”
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A Sun-like star orbiting a black hole by El-Badry, Kareem, Rix, Hans-Walter, Quataert, Eliot, Howard, Andrew W, Isaacson, Howard, Fuller, Jim, Hawkins, Keith, Breivik, Katelyn, Wong, Kaze W K, Rodriguez, Antonio C, Conroy, Charlie, Shahaf, Sahar, Mazeh, Tsevi, Arenou, Frédéric, Burdge, Kevin B, Bashi, Dolev, Faigler, Simchon, Weisz, Daniel R, Seeburger, Rhys, Almada Monter, Silvia, Wojno, Jennifer

“…ABSTRACT We report discovery of a bright, nearby ($G = 13.8;\, \, d = 480\, \rm pc$) Sun-like star orbiting a dark object. We identified the system as a black…”
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Hot Jupiters Have Giant Companions: Evidence for Coplanar High-eccentricity Migration by Zink, Jon K., Howard, Andrew W.

“…Abstract This study considers the characteristics of planetary systems with giant planets based on a population-level analysis of the California Legacy Survey…”
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The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age by Petigura, Erik A., Rogers, James G., Isaacson, Howard, Owen, James E., Kraus, Adam L., Winn, Joshua N., MacDougall, Mason G., Howard, Andrew W., Fulton, Benjamin, Kosiarek, Molly R., Weiss, Lauren M., Behmard, Aida, Blunt, Sarah

“…Abstract In 2017, the California-Kepler Survey (CKS) published its first data release (DR1) of high-resolution optical spectra of 1305 planet hosts. Refined…”
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Identifying Young Kepler Planet Host Stars from Keck–HIRES Spectra of Lithium by Berger, Travis A., Howard, Andrew W., Boesgaard, Ann Merchant

“…Abstract The lithium doublet at 6708 Å provides an age diagnostic for main sequence FGK dwarfs. We measured the abundance of lithium in 1305 stars with…”
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OBLIQUITIES OF HOT JUPITER HOST STARS: EVIDENCE FOR TIDAL INTERACTIONS AND PRIMORDIAL MISALIGNMENTS by ALBRECHT, Simon, WINN, Joshua N, HIRANO, Teruyuki, BAKOS, Gaspar, HARTMAN, Joel D, JOHNSON, John A, HOWARD, Andrew W, MARCY, Geoffrey W, PAUL BUTLER, R, ARRIAGADA, Pamela, CRANE, Jeffrey D, SHECTMAN, Stephen A, THOMPSON, Ian B

“…We provide evidence that the obliquities of stars with close-in giant planets were initially nearly random, and that the low obliquities that are often…”
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FRIENDS OF HOT JUPITERS. I. A RADIAL VELOCITY SEARCH FOR MASSIVE, LONG-PERIOD COMPANIONS TO CLOSE-IN GAS GIANT PLANETS by Knutson, Heather A, Fulton, Benjamin J, Montet, Benjamin T, Kao, Melodie, Ngo, Henry, Howard, Andrew W, CREPP, JUSTIN R, Hinkley, Sasha, Bakos, Gaspar A, BATYGIN, KONSTANTIN, Johnson, John Asher, Morton, Timothy D, Muirhead, Philip S

“…In this paper we search for distant massive companions to known transiting gas giant planets that may have influenced the dynamical evolution of these systems…”
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The California Planet Survey. I. Four New Giant Exoplanets by W. Howard, Andrew, Johnson, John Asher, W. Marcy, Geoffrey, A. Fischer, Debra, T. Wright, Jason, Bernat, David, W. Henry, Gregory, M. G. Peek, Kathryn, Isaacson, Howard, Apps, Kevin, Endl, Michael, D. Cochran, William, A. Valenti, Jeff, Anderson, Jay, E. Piskunov, Nikolai

“…We present precise Doppler measurements of four stars obtained during the past decade at Keck Observatory by the California Planet Survey (CPS). These stars,…”
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FRIENDS OF HOT JUPITERS. IV. STELLAR COMPANIONS BEYOND 50 au MIGHT FACILITATE GIANT PLANET FORMATION, BUT MOST ARE UNLIKELY TO CAUSE KOZAI-LIDOV MIGRATION by Ngo, Henry, Knutson, Heather A., Hinkley, Sasha, Bryan, Marta, Crepp, Justin R., Batygin, Konstantin, Crossfield, Ian, Hansen, Brad, Howard, Andrew W., Johnson, John A., Mawet, Dimitri, Morton, Timothy D., Muirhead, Philip S., Wang, Ji

“…ABSTRACT Stellar companions can influence the formation and evolution of planetary systems, but there are currently few observational constraints on the…”
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SPITZER OBSERVATIONS CONFIRM AND RESCUE THE HABITABLE-ZONE SUPER-EARTH K2-18b FOR FUTURE CHARACTERIZATION by Benneke, Björn, Werner, Michael, Petigura, Erik, Knutson, Heather, Dressing, Courtney, Crossfield, Ian J. M., Schlieder, Joshua E., Livingston, John, Beichman, Charles, Christiansen, Jessie, Krick, Jessica, Gorjian, Varoujan, Howard, Andrew W., Sinukoff, Evan, Ciardi, David R., Akeson, Rachel L.

“…ABSTRACT The recent detections of two transit events attributed to the super-Earth candidate K2-18b have provided the unprecedented prospect of…”
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The Orbital Architecture of Qatar-6: A Fully Aligned Three-body System? by Rice, Malena, Wang, Songhu, Gerbig, Konstantin, Wang, Xian-Yu, Dai, Fei, Tyler, Dakotah, Isaacson, Howard, Howard, Andrew W.

“…Abstract The evolutionary history of an extrasolar system is, in part, fossilized through its planets’ orbital orientations relative to the host star’s spin…”
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ORBITAL ARCHITECTURES OF PLANET-HOSTING BINARIES. I. FORMING FIVE SMALL PLANETS IN THE TRUNCATED DISK OF KEPLER-444A by Dupuy, Trent J, Kratter, Kaitlin M, Kraus, Adam L, Isaacson, Howard, Mann, Andrew W, Ireland, Michael J, Howard, Andrew W, Huber, Daniel

“…ABSTRACT We present the first results from our Keck program investigating the orbital architectures of planet-hosting multiple star systems. Kepler-444 is a…”
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THE TRENDS HIGH-CONTRAST IMAGING SURVEY. IV. THE OCCURRENCE RATE OF GIANT PLANETS AROUND M DWARFS by Montet, Benjamin T, CREPP, JUSTIN R, Johnson, John Asher, Howard, Andrew W, Marcy, Geoffrey W

“…Doppler-based planet surveys have discovered numerous giant planets but are incomplete beyond several AU. At larger star-planet separations, direct planet…”
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Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters by Howard, Andrew W, Marcy, Geoffrey W, Johnson, John Asher, Fischer, Debra A, Wright, Jason T, Isaacson, Howard, Valenti, Jeff A, Anderson, Jay, Lin, Doug N.C, Ida, Shigeru

“…The questions of how planets form and how common Earth-like planets are can be addressed by measuring the distribution of exoplanet masses and orbital periods…”
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RADIAL VELOCITY MONITORING OF KEPLER HEARTBEAT STARS by Shporer, Avi, Fuller, Jim, Isaacson, Howard, Hambleton, Kelly, Thompson, Susan E., Prša, Andrej, Kurtz, Donald W., Howard, Andrew W., O’Leary, Ryan M.

“…ABSTRACT Heartbeat stars (HB stars) are a class of eccentric binary stars with close periastron passages. The characteristic photometric HB signal evident in…”
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The California Legacy Survey. IV. Lonely, Poor, and Eccentric: A Comparison between Solitary and Neighborly Gas Giants by Rosenthal, Lee J., Howard, Andrew W., Knutson, Heather A., Fulton, Benjamin J.

“…Abstract We compare systems with single giant planets to systems with multiple giant planets using a catalog of planets from a high-precision radial velocity…”
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A rocky composition for an Earth-sized exoplanet by Howard, Andrew W., Sanchis-Ojeda, Roberto, Marcy, Geoffrey W., Johnson, John Asher, Winn, Joshua N., Isaacson, Howard, Fischer, Debra A., Fulton, Benjamin J., Sinukoff, Evan, Fortney, Jonathan J.

“…Doppler spectroscopic measurements of the mass of the Earth-sized planet Kepler-78b reveal that its mean density is similar to Earth’s, suggesting a…”
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K2 DISCOVERY OF YOUNG ECLIPSING BINARIES IN UPPER SCORPIUS: DIRECT MASS AND RADIUS DETERMINATIONS FOR THE LOWEST MASS STARS AND INITIAL CHARACTERIZATION OF AN ECLIPSING BROWN DWARF BINARY by David, Trevor J., Hillenbrand, Lynne A., Cody, Ann Marie, Carpenter, John M., Howard, Andrew W.

“…ABSTRACT We report the discovery of three low-mass double-lined eclipsing binaries in the pre-main sequence Upper Scorpius association, revealed by K2…”
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