1.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Consejo Nacional de Investigaciones Científicas y TécnicasAR395 papers
- Centre National de la Recherche ScientifiqueFR376 papers
- University of ArizonaUS368 papers
- Pontificia Universidad Católica de ChileCL356 papers
- The University of Texas at AustinUS355 papers
- Universidad Nacional de La PlataAR354 papers
- Universidad Andrés BelloCL353 papers
- Universidade de São PauloBR347 papers
- University of BolognaIT343 papers
- University of CambridgeGB330 papers
- University of GenevaCH329 papers
- University of MichiganUS327 papers
25 papers · 1 filter
The very massive X-ray bright binary system Wack 2134 (= WR 21a)
V. S. Niemela, R. C. Gamen, R. H. Barba +5
From the radial velocities of the N IV 4058 and He II 4686 emission lines, and the N V 4604-20 absorption lines, determined in digital spectra, we report the discovery that the X-r…
GEMINI near-infrared spectroscopic observations of young massive stars embedded in molecular clouds
A. Roman-Lopes, Z. Abraham, R. Ortiz +1
K-band spectra of young stellar candidates in four southern hemisphere clusters have been obtained with the near-infrared spectrograph GNIRS in Gemini South. The clusters are assoc…
The periodicity of the eta Carinae events
A. Damineli, M. F. Corcoran, D. J. Hillier +14
Extensive spectral observations of eta Carinae over the last cycle, and particularly around the 2003.5 low excitation event, have been obtained. The variability of both narrow and…
A multispectral view of the periodic events in eta Carinae
A. Damineli, D. J. Hillier, M. F. Corcoran +13
A full description of the 5.5-yr low excitation events in Eta Carinae is presented. We show that they are not as simple and brief as previously thought, but a combination of two co…
The Spitzer Survey of the Small Magellanic Cloud: Discovery of Embedded Protostars in the HII Region NGC 346
Joshua D. Simon, Alberto D. Bolatto, Barbara A. Whitney +6
We use Spitzer Space Telescope observations from the Spitzer Survey of the Small Magellanic Cloud (S3MC) to study the young stellar content of N66, the largest and brightest HII re…
Geysers in the Lagoon: new Herbig-Haro objects in M8
Rodolfo H. Barbá, Julia I. Arias
Aims: We search for direct evidence of ongoing star formation by accretion in the Lagoon Nebula (M8), using optical wide-field narrow-band imaging obtained at La Silla Observatory.…
Witnessing the formation of a galaxy cluster at z=0.485: optical and X-ray properties of RX J1117.4+0743 ([VMF 98] 097)
E. R. Carrasco, E. S. Cypriano, G. B. Lima Neto +4
We present a multiwavelength study of the poor cluster RX J1117.4+0743 ([VMF 98] 097) at z=0.485, based on GMOS/Gemini South g', r' photometry and spectroscopy, and XMM-Newton obse…
ISOCAM Mid-infrared spectroscopy and NIR photometry of the HII complex N4 in LMC
A. Contursi, M. Rubio, M. Sauvage +3
[Abridged] We present the analysis of ISOCAM-CVF and NIR photometry data of the HII region complex N4 in LMC. The aim is twofold: 1) to study the connection between the ISM and the…
Pre-main sequence stars in the Lagoon Nebula (M8)
Julia I. Arias, Rodolfo H. Barba, Nidia I. Morrell
We report the discovery of new pre-main sequence (PMS) stars in the Lagoon Nebula (M8) at a distance of 1.25 kpc, based on intermediate resolution spectra obtained with the Boller…
The first orbital solution for the massive colliding-wind binary HD93162 (=WR25)
R. Gamen, E. Gosset, N. Morrell +6
Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD93162 (=WR25), this object has been predicted to be a colliding-wind binary system. How…
Optical Spectroscopy of X-Mega targets in the Carina Nebula - VI. FO 15: a new O-Type double-lined eclipsing binary
V. S. Niemela, N. I. Morrell, E. Fernandez Lajus +3
We report the discovery of a new O-type double-lined spectroscopic binary with a short orbital period of 1.4 days. We find the primary component of this binary, FO 15, to have an a…
The infrared Hourglass cluster in M8
J. Arias, R. Barba, J. Maiz Apellaniz +2
A detailed study of the Hourglass Nebula in the M8 star forming region is presented. The study is mainly based on recent subarcsec-resolution JHKs images taken at Las Campanas Obse…
The Nearest Star of spectral type O3: A Component of the Multiple System HD 150136
V. S. Niemela, R. C. Gamen
From radial velocities determined in high signal-to-noise digital spectra, we report the discovery that the brightest component of the binary system HD 150136 is of spectral type O…
G287.84--0.82: An Infrared Star Cluster in the Carina Nebula
G. F. Hägele, J. F. Albacete Colombo, R. H. Barbá +1
We have studied the properties of an infrared cluster embedded in the gas and dust of the southern part of the Carina Nebula (NGC 3372), where the probable existence of current sta…
Carina's Defiant Finger: HST Observations of a Photoevaporating Globule in NGC3372
Nathan Smith, Rodolfo Barba, Nolan R. Walborn
We present HST/WFPC2 images of a prominent externally-ionized molecular globule in the Carina Nebula (NGC3372), supplemented with ground-based IR images and visual-wavelength spect…
The cluster of galaxies Abell 376
D. Proust, H. V. Capelato, G. Hickel +3
We present a dynamical analysis of the galaxy cluster Abell 376 based on a set of 73 velocities, most of them measured at Pic du Midi and Haute-Provence observatories and completed…
Bulge Microlensing Optical Depth from EROS 2 observations
C. Afonso, J. -N. Albert, C. Alard +7
We present a measurement of the microlensing optical depth toward the Galactic bulge based on the analysis of 15 contiguous1 square degrees fields centered on (l=2.5 deg, b=-4.0 de…
Observation of periodic variable stars towards the galactic spiral arms by EROS II
F. Derue, J. B. Marquette, S. Lupone +11
We present the results of a massive variability search based on a photometric survey of a six square degree region along the Galactic plane at (, ) a…
Merging Binary Clusters
R. Hank Donnelly, W. Forman, C. Jones +4
We study three prominent bi-modal X-ray clusters: A3528, A1750 and A3395. Using observations taken with ROSAT and ASCA, we analyze the temperature and surface brightness distributi…
Photometric Constraints on Microlens Spectroscopy of EROS-BLG-2000-5
C. Afonso
We apply EROS photometric data to interpret previously published Keck and VLT spectra of the binary-microlens caustic-crossing event EROS-BLG-2000-5. We show that the VLT data impl…
The Cluster of Galaxies Abell 970
L. Sodre, D. Proust, H. V. Capelato +4
We present a dynamical analysis of the galaxy cluster Abell 970 based on a new set of radial velocities measured at ESO, Pic du Midi and Haute-Provence observatories. Our analysis…
Observation of Microlensing towards the Galactic Spiral Arms. EROS II 3 year survey
EROS Collaboration
We present an analysis of the light curves of 9.1 million stars observed during three seasons by EROS (Experience de Recherche d'Objets Sombres), in the Galactic plane away from th…
Combined Analysis of the Binary-Lens Caustic-Crossing Event MACHO 98-SMC-1
C. Afonso, C. Alcock, S. H. Rhie +2
We fit the data for the binary-lens microlensing event MACHO 98-SMC-1 from 5 different microlensing collaborations and find two distinct solutions characterized by binary separatio…
EROS and MACHO Combined Limits on Planetary Mass Dark Matter in the Galactic Halo
EROS Collaboration, MACHO Collaboration
The EROS and MACHO collaborations have each published upper limits on the amount of planetary mass dark matter in the Galactic Halo obtained from gravitational microlensing searche…