Hunting for Polluted White Dwarfs and Other Treasures with Gaia XP Spectra and Unsupervised Machine Learning

no code implementations • 27 May 2024 • Malia L. Kao, Keith Hawkins, Laura K. Rogers, Amy Bonsor, Bart H. Dunlap, Jason L. Sanders, M. H. Montgomery, D. E. Winget

White dwarfs (WDs) polluted by exoplanetary material provide the unprecedented opportunity to directly observe the interiors of exoplanets.

TESS Hunt for Young and Maturing Exoplanets (THYME) V: A Sub-Neptune Transiting a Young Star in a Newly Discovered 250 Myr Association

no code implementations • 11 Feb 2021 • Benjamin M. Tofflemire, Aaron C. Rizzuto, Elisabeth R. Newton, Adam L. Kraus, Andrew W. Mann, Andrew Vanderburg, Tyler Nelson, Keith Hawkins, Mackenna L. Wood, George Zhou, Samuel N. Quinn, Steve B. Howell, Karen A. Collins, Richard P. Schwarz, Keivan G. Stassun, Luke G. Bouma, Zahra Essack, Hugh Osborn, Patricia T. Boyd, Gabor Furesz, Ana Glidden, Joseph D. Twicken, Bill Wohler, Brian McLean, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins

We report on the discovery of a sub-Neptune-size planet orbiting the young star HD 110082 (TOI-1098).

Time Series Analysis Earth and Planetary Astrophysics Solar and Stellar Astrophysics

TESS Hunt for Young and Maturing Exoplanets (THYME) IV: Three small planets orbiting a 120 Myr-old star in the Pisces--Eridanus stream

no code implementations • 11 Feb 2021 • Elisabeth R. Newton, Andrew W. Mann, Adam L. Kraus, John H. Livingston, Andrew Vanderburg, Jason L. Curtis, Pa Chia Thao, Keith Hawkins, Mackenna L. Wood, Aaron C. Rizzuto, Abderahmane Soubkiou, Benjamin M. Tofflemire, George Zhou, Ian J. M. Crossfield, Logan A. Pearce, Karen A. Collins, Dennis M. Conti, Thiam-Guan Tan, Steven Villeneuva, Alton Spencer, Diana Dragomir, Samuel N. Quinn, Eric L. N. Jensen, Kevin I. Collins, Chris Stockdale, Ryan Cloutier, Coel Hellier, Zouhair Benkhaldoun, Carl Ziegler, César Briceño, Nicholas Law, Björn Benneke, Jessie L. Christiansen, Varoujan Gorjian, Stephen R. Kane, Laura Kreidberg, Farisa Y. Morales, Michael W Werner, Joseph D. Twicken, Alan M. Levine, David R. Ciardi, Natalia M. Guerrero, Katharine Hesse, Elisa V. Quintana, Bernie Shiao, Jeffrey C. Smith, Guillermo Torres, George R. Ricker, Roland Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, David W. Latham

Young exoplanets can offer insight into the evolution of planetary atmospheres, compositions, and architectures.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

The COMBS Survey -- II. Distinguishing the Metal-Poor Bulge from the Halo Interlopers

no code implementations • 8 Sep 2020 • Madeline Lucey, Keith Hawkins, Melissa Ness, Victor P. Debattista, Alice Luna, Martin Asplund, Thomas Bensby, Luca Casagrande, Sofia Feltzing, Kenneth C. Freeman, Chiaki Kobayashi, Anna F. Marino

Currently, it is unclear if the metal-poor stars in the bulge ([Fe/H] < -1 dex) are merely halo interlopers, a unique accreted population, part of the boxy/peanut-shaped (B/P) bulge or a classical bulge population.

Astrophysics of Galaxies

Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump

1 code implementation • 16 Apr 2019 • Oliver J. Hall, Guy R. Davies, Yvonne P. Elsworth, Andrea Miglio, Timothy R. Bedding, Anthony G. A. Brown, Saniya Khan, Keith Hawkins, Rafael A. García, William J. Chaplin, Thomas S. H. North

This intrinsic dispersion in the K band provides a distance precision of ~1% for RC stars.

Solar and Stellar Astrophysics