Search Publications
Confirmation of Color-dependent Centroid Shift Measured After 1.8 Years with HST
Lu, Jessica R.; Cole, Andrew A.; Fukui, Akihiko +10 more
We measured the precise masses of the host and planet in the OGLE-2003-BLG-235 system, when the lens and source were resolving, with 2018 Keck high resolution images. This measurement is in agreement with the observation taken in 2005 with the Hubble Space Telescope (HST). In the 2005 data, the lens and sources were not resolved and the measuremen…
Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared
Marley, Mark; Meyer, Michael R.; Quanz, Sascha P. +7 more
We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ~700 au projected separation around a 15 Myr old stellar binary, using the APOLLO retrieval code on spectral data spanning 1.1-2.5 µm. C/O ratios can provide evidence for companion formation pathways, as such pathways are ambigu…
The K2 and TESS Synergy. II. Revisiting 26 Systems in the TESS Primary Mission
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +16 more
The legacy of NASA's K2 mission has provided hundreds of transiting exoplanets that can be revisited by new and future facilities for further characterization, with a particular focus on studying the atmospheres of these systems. However, the majority of K2-discovered exoplanets have typical uncertainties on future times of transit within the next…
Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System
Duchêne, Gaspard; Oppenheimer, Rebecca; Rice, Malena +51 more
The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We present the first ALMA observation of the system as well as the continued Gemini Planet Imager monitoring of the c…
Signal Synchronization Strategies and Time Domain SETI with Gaia DR3
Davenport, James R. A.; Siemion, Andrew P. V.; Croft, Steve +1 more
Spatiotemporal techniques for signal coordination with actively transmitting extraterrestrial civilizations, without the need for prior communication, can constrain technosignature searches to a significantly smaller coordinate space. With the variable star catalog from Gaia Data Release 3, we explore two related signaling strategies: the SETI Ell…
The SSA22 H I Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog
Ouchi, Masami; Hennawi, Joseph F.; Inoue, Akio K. +16 more
We conducted a deep spectroscopic survey, named SSA22-HIT, in the SSA22 field with the DEep Imaging MultiObject Spectrograph (DEIMOS) on the Keck telescope, designed to tomographically map high-z H I gas through analysis of Lyα absorption in background galaxies' spectra. In total, 198 galaxies were spectroscopically confirmed at 2.5 < z < 6 …
Spinning up a Daze: TESS Uncovers a Hot Jupiter Orbiting the Rapid Rotator TOI-778
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +69 more
NASA's Transiting Exoplanet Survey Satellite (TESS) mission has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination of these worlds. We present the discovery of a hot Jupiter orbit…
To Be or Not to Be: Alicante-8, a Cluster or Not?
Rejkuba, M.; Negueruela, I.; Ivanov, V. D. +3 more
Recent surveys have uncovered new young massive clusters that host dozens of red supergiants (RSGs) near the inner Galaxy. However, many of them have still not been fully studied. Using Very Large Telescope/X-shooter near-infrared spectra, we present the first radial velocity analysis for the putative members of the candidate RSG cluster Alicante-…
A Wide View of the Galactic Globular Cluster NGC 2808: Red Giant and Horizontal Branch Star Spatial Distributions
Rest, Armin; Mastrobuono-Battisti, Alessandra; Johnson, Christian I. +7 more
Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the cluster tidal radius. We used the C ugi = (u - g) - (g - i) index to identify three …
Stable Coronal X-Ray Emission over 20 yr of XZ Tau
Schneider, P. C.; Principe, David A.; Wolk, Scott J. +3 more
XZ Tau AB is a frequently observed binary young stellar object in the Taurus Molecular Cloud; XZ Tau B has been classified as an EXOr object. We present new Chandra/HETG-ACIS-S observations of XZ Tau AB, complemented with variability monitoring of the system with XMM-Newton, to constrain the variability of this system and identify high-resolution …