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
63 papers · 2 filters
The Disk Atmospheres of Three Herbig Ae/Be Stars
David E. Harker, Charles E. Woodward, Diane H. Wooden +1
We present infrared (IR) spectrophotometry () of three Herbig Ae/Be stars surrounded by possible protoplanetary disks: HD 150193, HD100546 and HD 179218. We construct…
A Robust Measure of Tidal Circularization in Coeval Binary Populations: The solar-type spectroscopic Binary Population in The Open Cluster M35
S. Meibom, R. D. Mathieu
We present a new homogeneous sample of 32 spectroscopic binary orbits in the young (~ 150 Myr) main-sequence open cluster M35. The distribution of orbital eccentricity vs. orbital…
High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
Joshua D. Simon, Alberto D. Bolatto, Adam Leroy +2
We derive rotation curves for four nearby, low-mass spiral galaxies and use them to constrain the shapes of their dark matter density profiles. This analysis is based on high-resol…
The Centers of Early-Type Galaxies with HST. V. New WFPC2 Photometry
Tod R. Lauer, S. M. Faber, Karl Gebhardt +14
We analyze HST+WFPC2 images of 77 early-type galaxies. Brightness profiles are classed into "core" or "power-law" forms. Cores are typically rounder than power-law galaxies. Nearly…
The Stellar Content of Obscured Galactic Giant HII Regions V: G333.1--0.4
E. Figueredo, R. D. Blum, A. Damineli +1
We present high angular resolution near--infrared images of the obscured Galactic Giant HII (GHII) region G333.1--0.4 in which we detect an OB star cluster. For G333.1--0.4, we fin…
FLAMINGOS Spectroscopy of New Low-Mass Members of the Young Cluster IC 348
K. L. Luhman, Elizabeth A. Lada, August A. Muench +1
We present spectroscopy of candidate stellar and substellar members of the young cluster IC 348. Using the Florida Multi-Object Imaging Near-Infrared Grism Observational Spectromet…
Chandra HRC Localization of the Low Mass X-ray Binaries X1624-490 and X1702-429: The Infrared Counterparts
S. Wachter, J. W. Wellhouse, S. K. Patel +3
We report on the precise localization of the low mass X-ray binaries X1624-490 and X1702-429 with the Chandra HRC-I. We determine the best positions to be 16:28:02.825 -49:11:54.61…
Opening the Treasure Chest: A Newborn Star Cluster Emerges from its Dust Pillar in Carina
Nathan Smith, Keivan G. Stassun, John Bally
We present detailed observations of the Treasure Chest, a compact nebula at the head of a dust pillar in the southern Carina nebula. This object is of interest because it is an exa…
The Massive Runaway Stars HD 14633 and HD 15137
T. S. Boyajian, T. D. Beaulieu, D. R. Gies +6
We present results from a radial velocity study of two runaway O-type stars, HD 14633 (ON8.5 V) and HD 15137 (O9.5 III(n)). We find that HD 14633 is a single-lined spectroscopic bi…
Physical Properties of Spicules from Simultaneous Spectro-Polarimetric Observations of He I and Ca II Lines
H. Socas-Navarro, D. Ellmore
We present full Stokes observations from SPINOR in the \ion{Ca}{2} infrared triplet and the \ion{He}{1} multiplet at 1083 nm from which some properties of spicules have been derive…
The CIDA Variability Survey of Orion OB1. I: the low-mass population of Ori OB 1a and 1b
Cesar Briceno, Nuria Calvet, Jesus Hernandez +4
We present results of a large scale, multi-epoch optical survey of the Ori OB1 association, carried out with the QuEST camera at the Venezuela National Astronomical Observatory. We…
uvbyCaHbeta CCD Photometry of Clusters. V. The Metal-Deficient Open Cluster NGC 2243
B. J. Anthony-Twarog, J. Atwell, B. A. Twarog
CCD photometry on the intermediate-band uvbyCaHbeta system is presented for the metal-deficient open cluster, NGC 2243. Restricting the data to probable single members of the clust…
A Deep Radio Survey of Abell 2125 II: Accelerated Galaxy Evolution during a Cluster-Cluster Merger
F. N. Owen, M. J. Ledlow, W. C. Keel +2
Using our extensive radio, optical, near-IR and X-ray imaging and spectroscopy, we consider the reason for the unusually large number of radio detected galaxies, mostly found outsi…
A Deep Radio Survey of Abell 2125 I: Radio, Optical and Near-IR Observations
F. N. Owen, W. C. Keel, M. J. Ledlow +2
We present a description of deep radio, optical, and near IR observations taken with the VLA, the KPNO 2m and the KPNO 4m of the region containing the rich cluster of galaxies Abel…
B Star Rotational Velocities in h and chi Persei: A Probe of Initial Conditions During the Star-Formation Process
Stephen E. Strom, Sidney C. Wolff, David Dror
Projected rotational velocities have been measured for 216 B0--B9 stars in the rich, dense h and chi Persei double cluster, and compared with the distribution of rotational velocit…
Small PAHs in the Red Rectangle
Uma P. Vijh, Adolf N. Witt, Karl D. Gordon
Following our initial discovery of blue luminescence in the spectrum of the Red Rectangle (RR) and its identification as fluorescence by small three- to four-ringed polycyclic arom…
A Photometric Technique to Search for Be Stars in Open Clusters
M. Virginia McSwain, Douglas R. Gies
We describe a technique to identify Be stars in open clusters using Stromgren b, y, and narrow-band Halpha photometry. We first identify the B-type stars of the cluster using a the…
Phase-Resolved Infrared H- and K-band Spectroscopy of EF Eridani
Thomas E. Harrison, Steve B. Howell, Paula Szkody +3
We present new phase-resolved H and K-band spectroscopy of the ultra-short period magnetic cataclysmic variable EF Eri in its current, prolonged ``low'' state obtained using NIRI o…
Chemical Abundances for Seven Giant Stars in M68 (NGC 4590) : A Globular Cluster with Abnormal Silicon and Titanium Abundances
Jae-Woo Lee, Bruce W. Carney, Michael J. Habgood
We present a detailed chemical abundance study of seven giant stars in M68 including six red giants and one post-AGB star. We find significant differences in the gravities determin…
A multi-color and Fourier study of RR Lyrae variables in the globular cluster NGC 5272 (M3)
C. Cacciari, T. M. Corwin, B. W. Carney
We have performed a detailed study of the pulsational and evolutionary characteristics of 133 RR Lyrae stars in the globular cluster NGC5272 (M3) using highly accurate BVI data tak…
The Largest Blueshifts of [O III] emission line in Two Narrow-Line Quasars
Kentaro Aoki, Toshihiro Kawaguchi, Kouji Ohta
We have obtained optical intermediate resolution spectra (R = 3000) of the narrow-line quasars DMS 0059-0055 and PG 1543+489. The [O III] emission line in DMS 0059-0055 is blueshif…
Hard X-ray emitting Active Galactic Nuclei selected by the Chandra Multi-wavelength Project
J. Silverman, P. Green, W. Barkhouse +13
We present X-ray and optical analysis of 188 AGN identified from 497 hard X-ray (f (2.0-8.0 keV) > 2.7x10^-15 erg cm^-2 s^-1) sources in 20 Chandra fields (1.5 deg^2) forming part…
A Near-Infrared (JHK) Survey of the Vicinity of the HII region NGC 7538: Evidence for a Young Embedded Cluster
Z. Balog, S. J. Kenyon, E. A. Lada +3
We describe the results of two near infrared (K-band) imaging surveys and a three color (JHK) survey of the vicinity of NGC 7538. The limiting magnitudes are K ~ 16.5 and K ~ 17.5…
A Period and a Prediction for the Of?p Spectrum Alternator HD 191612
Nolan R. Walborn, Ian D. Howarth, Gregor Rauw +7
The observational picture of the enigmatic O-type spectrum variable HD191612 has been sharpened substantially. A symmetrical, low-amplitude light curve with a period near 540 d has…