19.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kitt Peak National ObservatoryUS401 papers
- Cerro Tololo Inter-American ObservatoryCL274 papers
- U.S. National Science FoundationUS162 papers
- Space Telescope Science InstituteUS159 papers
- California Institute of TechnologyUS116 papers
- University of ArizonaUS99 papers
- Center for Astrophysics Harvard & SmithsonianUS80 papers
- Johns Hopkins UniversityUS71 papers
- University of California, BerkeleyUS58 papers
- University of Wisconsin–MadisonUS58 papers
- Carnegie ObservatoriesUS57 papers
- Goddard Space Flight CenterUS56 papers
55 papers · 1 filter
Triply eclipsing triple stars in the northern TESS fields: TICs 193993801, 388459317 and 52041148
T. Borkovits, T. Mitnyan, S. A. Rappaport +23
In this work we report the discovery and analysis of three new triply eclipsing triple star systems found with the TESS mission during its observations of the northern skies: TICs…
Orbital Period Changes in WZ Sagittae
Joseph Patterson, Geoffrey Stone, Jonathan Kemp +19
We report a long-term (1961-2017) study of the eclipse times in the dwarf nova WZ Sagittae, in an effort to learn its rate of orbital-period change. Some wiggles with a time scale…
WIYN Open Cluster Study XXXII: Stellar Radial Velocities in the Old Open Cluster NGC 188
Aaron M. Geller, Robert D. Mathieu, Hugh C. Harris +1
(Abridged) We present the results of our ongoing radial-velocity (RV) survey of the old (7 Gyr) open cluster NGC 188. Our WIYN 3.5m data set spans a time baseline of 11 years, a ma…
Spectroscopic Abundances in the Open Cluster, NGC 6819
Donald B. Lee-Brown, Barbara J. Anthony-Twarog, Constantine P. Deliyannis +2
High-dispersion spectra of 333 stars in the open cluster NGC 6819, obtained using the HYDRA spectrograph on the WIYN 3.5m telescope, have been analyzed to determine the abundances…
Light-Element Abundances of Giant Stars in the Globular Cluster M71 (NGC 6838)
Maria J. Cordero, Catherine A. Pilachowski, Christian I. Johnson +1
Aluminum is the heaviest light element displaying large star--to--star variations in Galactic globular clusters (GCs). This element may provide additional insight into the origin o…
Outflows, Dusty Cores, and a Burst of Star Formation in the North America and Pelican Nebulae
John Bally, Adam Ginsburg, Ron Probst +3
We present observations of near-infrared 2.12 micro-meter molecular hydrogen outflows emerging from 1.1 mm dust continuum clumps in the North America and Pelican Nebula (NAP) compl…
Absolute Properties of the Eclipsing Binary Star V501 Herculis
Claud H. Sandberg Lacy, Francis C. Fekel
V501 Her is a well detached G3 eclipsing binary star with a period of 8.597687 days for which we have determined very accurate light and radial-velocity curves by using robotic tel…
The Spectroscopic Orbits of Five Solar Type, Single Lined Binaries
Francis C. Fekel, Samira Rajabi, Matthew W. Muterspaugh +1
We have determined spectroscopic orbits for five single-lined spectroscopic binaries, HD 100167, HD 135991, HD 140667, HD 158222, HD 217924. Their periods range from 60.6 to 2403 d…
A Study of the Unusual Z Cam Systems IW Andromedae and V513 Cassiopeia
Paula Szkody, Meagan Albright, Albert P. Linnell +7
The Z Cam stars IW And and V513 Cas are unusual in having outbursts following their standstills in contrast to the usual Z Cam behavior of quiescence following standstills. In orde…
The Intrinsic Extreme Ultraviolet Fluxes of F5 V to M5 V Stars
Jeffrey L. Linsky, Juan Fontenla, Kevin France
Extreme ultraviolet (EUV) radiations (10--117 nm) from host stars play important roles in the ionization, heating, and mass loss from exoplanet atmospheres. Together with the host…
KIC 9406652: An Unusual Cataclysmic Variable in the Kepler Field of View
Douglas R. Gies, Zhao Guo, Steve B. Howell +6
KIC 9406652 is a remarkable variable star in the Kepler field of view that shows both very rapid oscillations and long term outbursts in its light curve. We present an analysis of…
WOCS 40007: A Detached Eclipsing Binary near the Turnoff of the Open Cluster NGC 6819
Mark W. Jeffries, Eric L. Sandquist, Robert D. Mathieu +10
We analyze extensive BVR_cI_c time-series photometry and radial-velocity measurements for WOCS 40007 (Auner 259; KIC 5113053), a double-lined detached eclipsing binary and a member…
Identification of 5 Interacting Binaries in the Galactic Bulge Survey
C. T. Britt, M. A. P. Torres, R. I. Hynes +10
We present optical lightcurves, spectroscopy, and classification of five X-ray sources in the Chandra Galactic Bulge Survey [CXOGBS J174009.1-284725 (CX5), CXOGBS J173935.7-272935…
Toward a Spectroscopic Census of White Dwarfs Within 40 parsecs of the Sun
M. -M. Limoges, S. Lepine, P. Bergeron
We present the preliminary results of a survey aimed at significantly increasing the range and completeness of the local census of spectroscopically confirmed white dwarfs. The cur…
Direct N-Body Modeling of the Old Open Cluster NGC 188: A Detailed Comparison of Theoretical and Observed Binary Star and Blue Straggler Populations
Aaron M. Geller, Jarrod R. Hurley, Robert D. Mathieu
(Abridged) Following on from a recently completed radial-velocity survey of the old (7 Gyr) open cluster NGC 188 in which we study in detail the solar-type hard binaries and blue s…
A Search for OB Associations Near Southern Long-Period Cepheids. V. AQ Puppis and V620 Puppis
David G. Turner, Sidney van den Bergh, Frank Younger +3
A photometric UBV survey is presented for 610 stars in a region surrounding the Cepheid AQ Puppis and centered southwest of the variable, based upon photoelectric measures for 14 s…
Absolute Properties of the Triple Star CF Tauri
Claud H. Sandberg, Guillermo Torres, Antonio Claret
CF Tau is now known to be an eclipsing triple star with relatively deep total and annular eclipses. New light and radial velocity curves as well as new times of minima were obtaine…
Physical Properties of the B and Be Star Populations of h and chi Persei
Amber N. Marsh Boyer, M. Virginia McSwain, Christina Aragona +1
We present a study of the B and Be star populations of the Double Cluster h and chi Persei. Blue optical spectroscopy is used to first measure projected rotational velocity, V sin…
Testing Disk-Locking in NGC 2264
P. Wilson Cauley, Christopher M. Johns-Krull, Catrina M. Hamilton +1
We test analytic predictions from different models of magnetospheric accretion, which invoke disk-locking, using stellar and accretion parameters derived from models of low resolut…
The Inter-Eruption Timescale of Classical Novae from Expansion of the Z Camelopardalis Shell
Michael M. Shara, Trisha Mizusawa, David Zurek +3
The dwarf nova Z Camelopardalis is surrounded by the largest known classical nova shell. This shell demonstrates that at least some dwarf novae must have undergone classical nova e…
HST and Optical Data Reveal White Dwarf Cooling, Spin and Periodicities in GW Librae 3-4 Years after Outburst
Paula Szkody, Anjum S. Mukadam, Boris T. Gaensicke +9
Since the large amplitude 2007 outburst which heated its accreting, pulsating white dwarf, the dwarf nova system GW Librae has been cooling to its quiescent temperature. Our Hubble…
The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs
Jacqueline K. Faherty, Adam J. Burgasser, Frederick M. Walter +6
We report parallax measurements for 70 ultracool dwarfs (UCDs). Using both literature values and our sample, we report new polynomial relations between spectral type and M.…
Constraints on the Formation of the Galactic Bulge from Na, Al, and Heavy Element Abundances in Plaut's Field
Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi +1
We report chemical abundances of Na, Al, Zr, La, Nd, and Eu for 39 red giant branch (RGB) stars and 23 potential inner disk red clump stars located in Plaut-s low extinction window…
The Core Composition of a White Dwarf in a Close Double Degenerate System
S. Vennes, A. Kawka
We report the identification of the double degenerate system NLTT 16249 that comprises a normal, hydrogen-rich (DA) white dwarf and a peculiar, carbon-polluted white dwarf (DQ) sho…