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
13 papers · 2 filters
Precision photometric monitoring of very low mass Sigma Orionis cluster members: variability and rotation at a few Myr
Ann Marie Cody, Lynne Hillenbrand
We present high-precision photometry on 107 variable low-mass stars and brown dwarfs in the ~3 Myr Sigma Orionis open cluster. We have carried out I-band photometric monitoring wit…
Whole Earth Telescope Observations of the subdwarf B star KPD 1930+2752: A rich, short period pulsator in a close binary
M. D. Reed, S. L. Harms, S. Poindexter +58
KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period just over two hours. The companion is most likely a w…
The Exotic Eclipsing Nucleus of the Ring Planetary Nebula SuWt2
K. Exter, Howard E. Bond, Keivan G. Stassun +3
SuWt2 is a planetary nebula (PN) consisting of a bright ionized thin ring seen nearly edge-on. It has a bright (V=12) central star, too cool to ionize the PN, which we discovered t…
Chemical Abundances for 855 Giants in the Globular Cluster Omega Centauri (NGC 5139)
Christian I. Johnson, Catherine A. Pilachowski
We present elemental abundances for 855 red giant branch (RGB) stars in the globular cluster Omega Centauri (w Cen) from spectra obtained with the Blanco 4m telescope and Hydra mul…
A Stellar Rotation Census of B Stars: from ZAMS to TAMS
Wenjin Huang, Douglas R. Gies, M. Virginia McSwain
Two recent observing campaigns provide us with moderate dispersion spectra of more than 230 cluster and 370 field B stars. Combining them and the spectra of the B stars from our pr…
A New Small-Amplitude Variable Hot DQ White Dwarf
B. H. Dunlap, B. N. Barlow, J. C. Clemens
We present the discovery of photometric variations in the carbon-dominated atmosphere (hot DQ) white dwarf star SDSS J133710.19-002643.6. We find evidence for two low-amplitude, ha…
Progressive star formation in the young galactic super star cluster NGC 3603
Giacomo Beccari, Loredana Spezzi, Guido De Marchi +22
Early release science observations of the cluster NGC3603 with the WFC3 on the refurbished HST allow us to study its recent star formation history. Our analysis focuses on stars wi…
Two-dimensional solar spectropolarimetry with the KIS/IAA Visible Imaging Polarimeter
C. Beck, L. R. Bellot Rubio, T. J. Kentischer +2
Spectropolarimetry at high spatial and spectral resolution is a basic tool to characterize the magnetic properties of the solar atmosphere. We introduce the KIS/IAA Visible Imaging…
Yellow Supergiants in the Small Magellanic Cloud (SMC): Putting Current Evolutionary Theory to the Test
Kathryn F. Neugent, Philip Massey, Brian Skiff +3
The yellow supergiant content of nearby galaxies provides a critical test of massive star evolutionary theory. While these stars are the brightest in a galaxy, they are difficult t…
New findings on the prototypical Of?p stars
Y. Naze, A. ud-Doula, M. Spano +3
In recent years several in-depth investigations of the three Galactic Of?p stars were undertaken. These multiwavelength studies revealed the peculiar properties of these objects (i…
The double degenerate system NLTT 11748
A. Kawka, S. Vennes, T. R. Vaccaro
We show that the extremely low-mass white dwarf NLTT 11748 (0.17 M_sun) is in a close binary with a fainter companion. We obtained a series of radial velocity measurements of the l…
Abundance analysis for long period variables. Velocity effects studied with O-rich dynamic model atmospheres
T. Lebzelter, W. Nowotny, S. Höfner +3
(abbreviated) Measuring the surface abundances of AGB stars is an important tool for studying the effects of nucleosynthesis and mixing in the interior of low- to intermediate mass…
The Onfp Class in the Magellanic Clouds
Nolan R. Walborn, Ian D. Howarth, Christopher J. Evans +8
The Onfp class of rotationally broadened, hot spectra was defined some time ago in the Galaxy, where its membership to date numbers only eight. The principal defining characteristi…