Search Publications
White Dwarf Binaries across the H-R Diagram
Schneider, Donald P.; Majewski, Steven R.; Stassun, Keivan G. +7 more
We created the APOGEE-GALEX-Gaia catalog to study white dwarf (WD) binaries. This database aims to create a minimally biased sample of WD binary systems identified from a combination of GALEX, Gaia, and APOGEE data to increase the number of WD binaries with orbital parameters and chemical compositions. We identify 3414 sources as WD binary candida…
High-velocity Stars in SDSS/APOGEE DR17
Pereira, C. B.; Cunha, K.; Majewski, S. R. +7 more
We report 23 stars having Galactocentric velocities larger than 450 km s-1 in the final data release of the APOGEE survey. This sample was generated using space velocities derived by complementing the high-quality radial velocities from the APOGEE project in Sloan Digital Sky Survey's Data Release 17 (DR17) with distances and proper mot…
TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone
Vanderburg, Andrew; Hellier, Coel; Triaud, Amaury H. M. J. +41 more
As an all-sky survey, NASA's Transiting Exoplanet Survey Satellite (TESS) mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolutionary processes that occur within the first billion years. Here we report the discovery of a young, multiplanet system orbiting t…
Discovery of SiO Masers in the "Water Fountain" Source IRAS 16552-3050
Tafoya, D.; Gómez, J. F.; Uscanga, L. +7 more
In this paper, we report new detections of SiO v = 1 and v = 2 J = 1 → 0 masers in the "water fountain" source IRAS 16552-3050, which was observed with the Nobeyama 45 m telescope during 2021 March-April. Water fountains are evolved stars whose H2O maser spectra trace high-velocity outflows of >100 km s-1. This is the seco…
Gap Opening and Inner Disk Structure in the Strongly Accreting Transition Disk of DM Tau
Dong, Ruobing; Johnstone, Doug; Liu, Hauyu Baobab +7 more
Large inner dust gaps in transition disks are frequently posited as evidence of giant planets sculpting gas and dust in the disk, or the opening of a gap by photoevaporative winds. Although the former hypothesis is strongly supported by the observations of planets and deep depletions in gas within the gap in some disks, many T Tauri stars hosting …
Revised Stellar Parameters for V471 Tau, A Post-common Envelope Binary in the Hyades
Drout, Maria R.; Muirhead, Philip S.; Nordhaus, Jason
V471 Tau is a post-common-envelope binary consisting of an eclipsing DA white dwarf and a K-type main-sequence star in the Hyades star cluster. We analyzed publicly available photometry and spectroscopy of V471 Tau to revise the stellar and orbital parameters of the system. We used archival K2 photometry, archival Hubble Space Telescope spectrosco…
Far-ultraviolet to FIR Spectral-energy Distribution Modeling of the Stellar Formation History of the M31 Bulge
Leahy, Denis; Leahy, Cameron; Seminoff, Noah
M31 is being surveyed at far- and near-ultraviolet with the UVIT telescope on AstroSat. The central bulge of M31 was observed in the N279N (275-280 nm), N219M (200-240 nm), F172M (160-185 nm), F169M (145-175 nm), and F148W (120-180 nm) filters. These images are made publicly available here. The UVIT data are supplemented with Sloan Digital Sky Sur…
A Jupiter Analog Orbiting The Nearby M Dwarf GJ 463
Cochran, William D.; Endl, Michael; Howard, Andrew W. +8 more
We report the detection of a long-period giant planetary companion to the nearby M3V star GJ 463 (=Ross 690). The detection is based on over ten years of highly-precise radial velocity measurements with the High Resolution Spectrograph at the Hobby-Eberly Telescope and the HIRES spectrograph at Keck. With an orbital period of 10 yr and a minimum m…
Milliarcsecond Astrometry for the Galilean Moons Using Stellar Occultations
Aoki, S.; Smith, M.; Carlson, R. W. +40 more
A stellar occultation occurs when a Solar System object passes in front of a star for an observer. This technique allows the sizes and shapes of the occulting body to be determined with kilometer precision. In addition, this technique constrains the occulting body's positions, albedos, densities, and so on. In the context of the Galilean moons, th…
3D Orbital Architecture of a Dwarf Binary System and Its Planetary Companion
Curiel, Salvador; Sanchez-Bermudez, Joel; Ortiz-León, Gisela N. +1 more
Because of the diversity of stellar masses and orbital sizes of binary systems and the complex interaction between star-star, star-planet, and planet-planet, it has been difficult to fully characterize the planetary systems associated with binary systems. Here, we report high-precision astrometric observations of the low-mass binary system GJ 896A…