Search Publications
Illuminating gravitational waves: A concordant picture of photons from a neutron star merger
Fox, O. D.; Cenko, S. B.; Sollerman, J. +78 more
Merging neutron stars offer an excellent laboratory for simultaneously studying strong-field gravity and matter in extreme environments. We establish the physical association of an electromagnetic counterpart (EM170817) with gravitational waves (GW170817) detected from merging neutron stars. By synthesizing a panchromatic data set, we demonstrate …
The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102
Lazio, T. J. W.; Ransom, S. M.; Chatterjee, S. +21 more
The precise localization of the repeating fast radio burst (FRB 121102) has provided the first unambiguous association (chance coincidence probability p ≲ 3 × 10-4) of an FRB with an optical and persistent radio counterpart. We report on optical imaging and spectroscopy of the counterpart and find that it is an extended (0.″6-0.″8) obje…
The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
Smail, I.; Hornschemeier, A. E.; Alexander, D. M. +23 more
We present X-ray source catalogs for the ≈7 Ms exposure of the Chandra Deep Field-South (CDF-S), which covers a total area of 484.2 arcmin2. Utilizing WAVDETECT for initial source detection and ACIS Extract for photometric extraction and significance assessment, we create a main source catalog containing 1008 sources that are detected i…
The Radial Velocity Experiment (RAVE): Fifth Data Release
Steinmetz, Matthias; Chaplin, W. J.; Lund, M. N. +51 more
Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9< I< 12) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra (R∼ 7500) covering the Ca-triplet region (8410-8795 Å) span the complete time frame from the start of RAVE observations in…
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott
We present empirical measurements of the radii of 116 stars that host transiting planets. These radii are determined using only direct observables—the bolometric flux at Earth, the effective temperature, and the parallax provided by the Gaia first data release—and thus are virtually model independent, with extinction being the only free parameter.…
Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
Batalha, Natalie M.; Bieryla, Allyson; Latham, David W. +14 more
The determination of exoplanet properties and occurrence rates using Kepler data critically depends on our knowledge of the fundamental properties (such as temperature, radius, and mass) of the observed stars. We present revised stellar properties for 197,096 Kepler targets observed between Quarters 1-17 (Q1-17), which were used for the final tran…
Dust in the Reionization Era: ALMA Observations of a z = 8.38 Gravitationally Lensed Galaxy
Pérez-Fournon, I.; Laporte, N.; Bauer, F. E. +6 more
We report on the detailed analysis of a gravitationally lensed Y-band dropout, A2744_YD4, selected from deep Hubble Space Telescope imaging in the Frontier Field cluster Abell 2744. Band 7 observations with the Atacama Large Millimeter/submillimeter Array (ALMA) indicate the proximate detection of a significant 1 mm continuum flux suggesting the p…
Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. II.Radii, Masses, and Ages
Chaplin, William J.; Davies, Guy R.; Latham, David W. +21 more
We use asteroseismic data from the Kepler satellite to determine fundamental stellar properties of the 66 main-sequence targets observed for at least one full year by the mission. We distributed tens of individual oscillation frequencies extracted from the time series of each star among seven modeling teams who applied different methods to determi…
Three-dimensional mapping of the local interstellar medium with composite data
Monreal-Ibero, A.; Elyajouri, M.; Lallement, R. +2 more
Context. Three-dimensional maps of the Galactic interstellar medium are general astrophysical tools. Reddening maps may be based on the inversion of color excess measurements for individual target stars or on statistical methods using stellar surveys. Three-dimensional maps based on diffuse interstellar bands (DIBs) have also been produced. All me…
Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
Petigura, Erik A.; von Braun, Kaspar; Yee, Samuel W.
Classification of stars, by comparing their optical spectra to a few dozen spectral standards, has been a workhorse of observational astronomy for more than a century. Here, we extend this technique by compiling a library of optical spectra of 404 touchstone stars observed with Keck/HIRES by the California Planet Search. The spectra have high reso…