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  • Direct acceleration: cosmic and exoplanet synergies 

    Erskine, David; Kim, Alex; Linder, Eric; Buschmann, Malte; Easther, Richard; Ferraro, Simone; Muirhead, Philip; Phillips, David; Ravi, Aakash; Safdi, Benjamin; Schaan, Emmanuel; Silverwood, Hamish; Walsworth, Ronald (2019-03-13)
    Direct measurement of acceleration is a key scientific goal for both cosmology and exoplanets. For cosmology, the concept of redshift drift (more than 60 years old by the 2020s) could directly establish the Friedmann-Lem ...
  • Design considerations for a ground-based search for transiting planets around L and T dwarfs 

    Tamburo, Patrick; Muirhead, Philip S. (IOP Publishing, 2019-11-01)
    We present design considerations for a ground-based survey for transiting exoplanets around L and T dwarfs, spectral classes that have yet to be thoroughly probed for planets. We simulate photometry for L and T targets ...
  • Searching for exosatellites orbiting L and T dwarfs: connecting planet formation to moon formation and finding new temperate worlds 

    Muirhead, Philip S.; Skinner, Julie N.; Radigan, Jacqueline; Triaud, Amaury; Theissen, Christopher; Gagliuffi, Daniella Bardalez; Tamburo, Patrick; Burgasser, Adam; Faherty, Jacqueline; Stephens, Denise (2019-03-18)
    L-type and T-type dwarfs span the boundaries between main-sequence stars, brown dwarfs, and planetary-mass objects. For these reasons, L and T dwarfs are the perfect laboratories for exploring the relationship between ...
  • Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-dwarf companion HAT-P-32B 

    Zhao, Ming; O'Rourke, Joseph G.; Wright, Jason T.; Knutson, Heather A.; Burrows, Adam; Fortney, Johnathan; Ngo, Henry; Fulton, Benjamin J.; Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Muirhead, Philip S.; Hinkley, Sasha; Showman, Adam P.; Curtis, Jason; Burruss, Rick (IOP PUBLISHING LTD, 2014-12-01)
    We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/WIRC in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of the planet host star HAT-P-32A ...
  • Design considerations for a ground-based search for transiting planets around L and T dwarfs 

    Muirhead, Philip; Tamburo, Patrick (2019-10-21)
    We present design considerations for a ground-based survey for transiting exoplanets around L and T dwarfs, spectral classes that have yet to be thoroughly probed for planets. We simulate photometry for L and T targets ...
  • Network and panel quantile effects via distribution regression 

    Chernozhukov, Victor; Fernandez-Val, Ivan; Weidner, Martin (2018-03-22)
    This paper provides a method to construct simultaneous con fidence bands for quantile functions and quantile effects in nonlinear network and panel models with unobserved two-way effects, strictly exogenous covariates, and ...
  • Three red suns in the sky: A transiting, terrestrial planet in a triple M-dwarf system at 6.9 pc 

    Winters, Jennifer G.; Medina, Amber A.; Irwin, Jonathan M.; Charbonneau, David; Astudillo-Defru, Nicola; Horch, Elliott P.; Eastman, Jason D.; Vrijmoet, Eliot Halley; Henry, Todd J.; Diamond-Lowe, Hannah; Winston, Elaine; Barclay, Thomas; Bonfils, Xavier; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Udry, Stéphane; Twicken, Joseph D.; Teske, Johanna K.; Tenenbaum, Peter; Pepe, Francesco; Murgas, Felipe; Muirhead, Philip S.; Mink, Jessica; Lovis, Christophe; Levine, Alan M.; Lépine, Sébastien; Jao, Wei-Chun; Henze, Christopher E.; Furész, Gábor; Forveille, Thierry; Figueira, Pedro; Esquerdo, Gilbert A.; Dressing, Courtney D.; Díaz, Rodrigo F.; Delfosse, Xavier; Burke, Christopher J.; Bouchy, François; Berlind, Perry; Almenara, Jose-Manuel (American Astronomical Society, 2019-10)
    We present the discovery from Transiting Exoplanet Survey Satellite (TESS) data of LTT 1445Ab. At a distance of 6.9 pc, it is the second nearest transiting exoplanet system found to date, and the closest one known for which ...
  • A super-earth and sub-neptune transiting the late-type M Dwarf LP 791-18 

    Crossfield, Ian J.M.; Waalkes, William; Newton, Elisabeth R.; Narita, Norio; Muirhead, Philip; Ment, Kristo; Matthews, Elisabeth; Kraus, Adam; Kostov, Veselin; Kosiarek, Molly R.; Kane, Stephen R.; Isaacson, Howard; Halverson, Sam; Gonzales, Erica; Everett, Mark; Dragomir, Diana; Collins, Karen A.; Chontos, Ashley; Berardo, David; Winters, Jennifer G.; Winn, Joshua N.; Scott, Nicholas J.; Rojas-Ayala, Barbara; Rizzuto, Aaron C.; Petigura, Erik A.; Peterson, Merrin; Mocnik, Teo; Mikal-Evans, Thomas; Mehrle, Nicholas; Matson, Rachel; Kuzuhara, Masayuki; Irwin, Jonathan; Huber, Daniel; Huang, Chelsea; Howell, Steve; Howard, Andrew W.; Hirano, Teruyuki; Fulton, Benjamin J.; Dupuy, Trent; Dressing, Courtney D.; Dalba, Paul A.; Charbonneau, David; Burt, Jennifer; Berta-Thompson, Zachory; Benneke, Björn; Watanabe, Noriharu; Twicken, Joseph D.; Tamura, Motohide; Schlieder, Joshua; Seager, S.; Rose, Mark E.; Ricker, George; Quintana, Elisa; Lépine, Sébastien; Latham, David W.; Kotani, Takayuki; Jenkins, Jon M.; Hori, Yasunori; Colon, Knicole; Caldwell, Douglas A. (American Astronomical Society, 2019-09-20)
    Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass ...
  • Kepler planet occurrence rates for mid-type M dwarfs as a function of spectral type 

    Hardegree-Ullman, Kevin; Cushing, Michael; Muirhead, Philip; Christiansen, Jessie (American Astronomical Society, 2019-07-29)
    Previous studies of planet occurrence rates largely relied on photometric stellar characterizations. In this paper, we present planet occurrence rates for mid-type M dwarfs using spectroscopy, parallaxes, and photometry ...
  • Shallow Ultraviolet Transits of WD 1145+017 

    Xu, Siyi; Hallakoun, Na’ama; Gary, Bruce; Dalba, Paul A.; Debes, John; Dufour, Patrick; Fortin-Archambault, Maude; Fukui, Akihiko; Jura, Michael A.; Klein, Beth; Kusakabe, Nobuhiko; Muirhead, Philip S.; Narita, Norio; Steele, Amy; Su, Kate Y.L.; Vanderburg, Andrew; Watanabe, Noriharu; Zhan, Zhuchang; Zuckerman, Ben (American Astronomical Society, 2019-06-05)
    WD 1145+017 is a unique white dwarf system that has a heavily polluted atmosphere, an infrared excess from a dust disk, numerous broad absorption lines from circumstellar gas, and changing transit features, likely from ...

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