Search Publications
Detection of p-mode Oscillations in HD 35833 with NEID and TESS
Mahadevan, Suvrath; Wright, Jason T.; Logsdon, Sarah E. +15 more
We report the results of observations of p-mode oscillations in the G0 subgiant star HD 35833 in both radial velocities and photometry with NEID and TESS, respectively. We achieve separate, robust detections of the oscillation signal with both instruments (radial velocity amplitude A RV = 1.11 ± 0.09 m s-1, photometric amplit…
Unbound Close Stellar Encounters in the Solar Neighborhood
Hansen, Bradley M. S.
We present a catalog of unbound stellar pairs, within 100 pc of the Sun, that are undergoing close, hyperbolic, encounters. The data are drawn from the GAIA EDR3 catalog, and the limiting factors are errors in the radial distance and unknown velocities along the line of sight. Such stellar pairs have been suggested to be possible events associated…
Searching the SETI Ellipsoid with Gaia
Davenport, James R. A.; Siemion, Andrew P. V.; Cody, Ann Marie +4 more
The search for extraterrestrial intelligence (SETI) Ellipsoid is a geometric method for prioritizing technosignature observations based on the strategy of receiving signals synchronized to conspicuous astronomical events. Precise distances to nearby stars from Gaia makes constraining Ellipsoid crossing times possible. Here we explore the utility o…
The Population of Compact Radio Sources in M17
Menten, Karl M.; Rodríguez, Luis F.; Loinard, Laurent +7 more
We present a catalog of radio sources of the M17 region based on deep X-band radio observations centered at 10 GHz obtained with the Jansky Very Large Array in the A configuration. We detect a total of 194 radio sources, 12 of them extended and 182 compact. We find that a significant fraction (at least 40% in our catalog) have suspected gyrosynchr…
Monitoring Inner Regions in the RY Tau Jet
Ohyama, Youichi; Currie, Thayne; Kwon, Jungmi +18 more
We present multiepoch observations of the RY Tau jet for Hα and [Fe II] 1.644 µm emission lines obtained with the Subaru Coronagraphic Extreme-AO and Visible Aperture Masking Polarimetric Imager for Resolved Exoplanetary Structures (VAMPIRES), Gemini Near-infrared Integral Field Spectrograph, and Keck/OSIRIS in 2019-2021. These data show a s…
The Hubble PanCET Program: Emission Spectrum of Hot Jupiter HAT-P-41b
Deming, Drake; Mikal-Evans, Thomas; Sing, David K. +7 more
We present the most complete emission spectrum for inflated hot Jupiter HAT-P-41b combining new Hubble Space Telescope Wide Field Camera/G141 spectrum from the Hubble Panchromatic Comparative Exoplanet Treasury program with archival Spitzer eclipse observations. We found a near blackbody-like emission spectrum, which is best fitted with an isother…
An Integrative Analysis of the Rich Planetary System of the Nearby Star e Eridani: Ideal Targets for Exoplanet Imaging and Biosignature Searches
Apai, Dániel; Dietrich, Jamie; Basant, Ritvik
e Eridani, the fifth-closest Sun-like star, hosts at least three planets and could possibly harbor more. However, the veracity of the planet candidates in the system and its full planetary architecture remain unknown. Here we analyze the planetary architecture of e Eridani via DYNAMITE, a method providing an integrative assessment of the system ar…
Ephemerides of the Irregular Saturnian Satellites from Earth-based Astrometry and Cassini Imaging
Jacobson, Robert A.; Sheppard, Scott S.; Brozović, Marina +2 more
We report a new determination of the orbits of the irregular Saturnian satellites. We fit their numerically integrated orbits to a data set containing Earth-based observations and imaging data from the Cassini spacecraft. We include the statistics of the observation residuals, the satellites' orbital elements, and projected accuracies of the satel…
The η Aquilae System: Radial Velocities and Astrometry in Search of η Aql B
Cochran, William D.; Harrison, Thomas E.; Anderson, Richard I. +4 more
The classical Cepheid η Aql was not included in past Leavitt Law work because of a presumed complicating orbit due to a known B9.8V companion. To determine the orbit of η Aql B, we analyze a significant number of radial velocity (RV) measurements from eight sources. With these we establish the RV variation due to Cepheid pulsation, using a model w…
USNO Bright Star Catalog, Version 1
Harris, Hugh C.; Munn, Jeffrey A.; Subasavage, John P. +3 more
The USNO Bright Star Catalog (UBSC) is a new astrometric catalog of the 1423 brightest stars covering the entire sky, which is published online. It is nearly complete to V = 3 mag except for three stellar systems. A combined astrometric solution of the Hipparcos Intermediate Astrometry Data and two dedicated ground-based campaigns in 2013-2020 is …