19.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR3.5k papers
- National Institute for AstrophysicsIT1.8k papers
- Max Planck Institute for AstronomyDE1.8k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.5k papers
- California Institute of TechnologyUS1.5k papers
- Space Telescope Science InstituteUS1.5k papers
- Leiden UniversityNL1.4k papers
- Center for Astrophysics Harvard & SmithsonianUS1.3k papers
- Osservatorio Astronomico di PadovaIT1.3k papers
- University of CambridgeGB1.2k papers
- Observatoire de ParisFR1.2k papers
- Instituto de Astrofísica de CanariasES1.2k papers
349 papers · 1 filter
Blue Straggler Stars in the Unusual Globular Cluster NGC 6388
E. Dalessandro, B. Lanzoni, F. R. Ferraro +4
We have used multi-band high resolution HST WFPC2 and ACS observations combined with wide field ground-based observations to study the blue straggler star (BSS) population in the g…
Optical observations of 23 distant Jupiter Family Comets, including 36P/Whipple at multiple phase angles
Colin Snodgrass, Stephen C. Lowry, Alan Fitzsimmons
We present photometry on 23 Jupiter Family Comets (JFCs) observed at large heliocentric distance, primarily using the 2.5m Isaac Newton Telescope (INT). Snap-shot images were taken…
Spitzer 24-micron Time-Series Observations of the Eclipsing M-dwarf Binary GU Bootis
Kaspar von Braun, Gerard T. van Belle, David R. Ciardi +3
We present a set of {\it Spitzer} 24m MIPS time series observations of the M-dwarf eclipsing binary star GU Boötis. Our data cover three secondary eclipses of the system: two co…
The discovery of high-amplitude 10.9-minute oscillations in the cool magnetic Ap star HD 115226
O. Kochukhov, T. Ryabchikova, S. Bagnulo +1
We present the discovery of pulsational variations in the cool magnetic Ap star HD 115226 -- the first high-amplitude rapidly oscillating Ap star discovered with time-series spectr…
UVES radial velocity accuracy from asteroid observations. Implications for the fine structure constant variability
P. Molaro, S. A. Levshakov, S. Monai +4
High resolution observations of the asteroids Iris and Juno have been performed by means of the UVES spectrograph at the ESO VLT to obtain the effective accurac y of the spectrogra…
HR 710 (HD 15144): An ultra-Sr-rich, magnetic Ap star with a close companion
C. R. Cowley, S. Hubrig
The magnetic, chemically peculiar A-star HR 710 (HD 15144, ADS 1849A, AB Cet) has a close companion in a nearly circular orbit. Its 3-day period is unusually short for such stars.…
The Subaru/XMM-Newton Deep Survey (SXDS) - V. Optically Faint Variable Object Survey
Tomoki Morokuma, Mamoru Doi, Naoki Yasuda +19
We present our survey for optically faint variable objects using multi-epoch (8-10 epochs over 2-4 years) -band imaging data obtained with Subaru Suprime-Cam over 0.918 deg…
X-ray and IR Point Source Identification and Characteristics in the Embedded, Massive Star-Forming Region RCW 108
Scott J. Wolk, Bradley D. Spitzbart, Tyler L. Bourke +3
We report on the results of an approximately 90 ks Chandra observation of a complex region that hosts multiple sites of recent and active star formation in ARA OB1a. The field is c…
First Stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876--032
J. I. González Hernández, P. Bonifacio, H. -G. Ludwig +15
We have used high-resolution, high-S/N ratio spectra from the UVES spectrograph at the ESO VLT telescope. Long-term radial-velocity measurements and broad-band photometry allow us…
Tracing the gas at redshift 1.7-3.5 with the Lyman-alpha forest: the FLO approach
F. Saitta, V. D'Odorico, M. Bruscoli +3
[Abridged] We present FLO (From Lines to Over-densities), a new technique to reconstruct the hydrogen density field for the Lya forest lines observed in high resolution QSO spectra…
The Nitrogen and Oxygen abundances in the neutral gas at high redshift
Patrick Petitjean, Cedric Ledoux, R. Srianand
We study the Oxygen and Nitrogen abundances in the interstellar medium of high-redshift galaxies. We use high resolution and high signal-to-noise ratio spectra of Damped Lyman-alph…
Europium, Samarium, and Neodymium Isotopic Fractions in Metal-Poor Stars
Ian U. Roederer, James E. Lawler, Christopher Sneden +3
We have derived isotopic fractions of europium, samarium, and neodymium in two metal-poor giants with differing neutron-capture nucleosynthetic histories. These isotopic fractions…
The carbon-rich type Ic SN 2007gr: the photospheric phase
S. Valenti, N. Elias-Rosa, S. Taubenberger +20
The first two months of spectroscopic and photometric monitoring of the nearby type Ic SN 2007gr are presented. The very early discovery (less than 5 days after the explosion) and…
Mid-infrared imaging of brown dwarfs in binary systems
K. Geißler, G. Chauvin, M. F. Sterzik
Context: Brown dwarfs exhibit complex atmospheric signatures, and their properties depend sensitively on effective temperature, surface gravity, and metallicity. Several physical p…
An extreme IMF as an explanation for high M/L ratios in UCDs? The CO index as a tracer of bottom heavy IMFs
Steffen Mieske, Pavel Kroupa
A new type of compact stellar systems, labelled ``ultra-compact dwarf galaxies'' (UCDs), was discovered in the last decade. Recent studies show that their dynamical mass-to-light r…
A Search for Synchrotron X-ray Emission in Radio Quasars
Hermine Landt, Paolo Padovani, Paolo Giommi +2
This paper presents XMM-Newton and Chandra X-ray spectroscopy of ten flat-spectrum radio quasars (FSRQ) which are candidates to have an X-ray spectrum dominated by jet synchrotron…
Supermassive Black Holes in Deep Multiwavelength Surveys
C. Megan Urry, E. Treister
In recent years deep X-ray and infrared surveys have provided an efficient way to find accreting supermassive black holes, otherwise known as active galactic nuclei (AGN), in the y…
The Importance of Being First: Position Dependent Citation Rates on arXiv:astro-ph
J. P. Dietrich
We study the dependence of citation counts of e-prints published on the arXiv:astro-ph server on their position in the daily astro-ph listing. Using the SPIRES literature database…
Testing the nature of S0 galaxies using planetary nebula kinematics in NGC 1023
E. Noordermeer, M. R. Merrifield, L. Coccato +9
We investigate the manner in which lenticular galaxies are formed by studying their stellar kinematics: an S0 formed from a fading spiral galaxy should display similar cold outer d…
Spiral inflow feeding the nuclear starburst in M83, observed in H-alpha emission with the GHAFAS Fabry-Perot interferometer
Kambiz Fathi, John E. Beckman, Andreas A. Lundgren +8
We present observations of the nearby barred starburst galaxy, M83 (NGC5236), with the new Fabry-Perot interferometer GHAFAS mounted on the 4.2 meter William Herschel Telescope on…
Stellar mass estimates in early-type galaxies from lensing+dynamical and photometric measurements
C. Grillo, R. Gobat, P. Rosati +1
In this paper we compare two different diagnostics for estimating stellar masses in early-type galaxies and we establish their level of reliability. In particular, we consider the…
On the white dwarf cooling sequence of the globular cluster Omega Centauri
A. Calamida, C. E. Corsi, G. Bono +16
We present deep and precise photometry (F435, F625W, F658N) of Omega Cen collected with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST). We have ide…
Normal Globular Cluster Systems in Massive Low Surface Brightness Galaxies
Daniela Villegas, Markus Kissler-Patig, Andrés Jordán +2
We present the results of a study of the globular cluster systems of 6 massive spiral galaxies, originally cataloged as low surface brightness galaxies but here shown to span a wid…
Two years of INTEGRAL monitoring of GRS 1915+105 Part 1: multiwavelength coverage with INTEGRAL, RXTE, and the Ryle radio Telescope
J. Rodriguez, D. C. Hannikainen, S. E. Shaw +13
(Abridged) We report the results of monitoring observations of the Galactic microquasar GRS 1915+105 performed simultaneously with INTEGRAL and RXTE Ryle . We present the results o…