Search Publications
Multiple stellar populations in Magellanic Cloud clusters. I. An ordinary feature for intermediate age globulars in the LMC?
Anderson, J.; Milone, A. P.; Bedin, L. R. +1 more
Context: The discovery of multiple main sequences (MS) in the massive clusters NGC 2808 and Omega Centauri, along with multiple subgiant branches in NGC 1851 and NGC 6388 has challenged the long-held paradigm that globular clusters consist of simple stellar populations. This evolving picture has been further complicated by recent photometric studi…
Star formation and mass assembly in high redshift galaxies
Fiore, F.; Castellano, M.; Pentericci, L. +14 more
Aims: The goal of this work is to infer the star formation properties and the mass assembly process of high redshift (0.3 ≤ z < 2.5) galaxies from their IR emission using the 24 µm band of MIPS-Spitzer.
Methods: We used an updated version of the GOODS-MUSIC catalog, which has multiwavelength coverage from 0.3 to 24 µm and either…
A double stellar generation in the globular cluster NGC 6656 (M 22). Two stellar groups with different iron and s-process element abundances
Milone, A. P.; Marino, A. F.; Bedin, L. R. +4 more
We present a chemical abundance analysis based on high resolution UVES spectra of seventeen bright giant stars in the Globular Cluster (GC) M 22. We obtained an average iron abundance of [Fe/H] = -1.76±0.02 (internal errors only) and an α enhancement of 0.36±0.04 (internal errors only). Na and O, and Al and O follow the well known anticorrelations…
PROSAC: a submillimeter array survey of low-mass protostars. II. The mass evolution of envelopes, disks, and stars from the Class 0 through I stages
Wilner, D. J.; van Dishoeck, E. F.; Lommen, D. +5 more
Context: The key question about early protostellar evolution is how matter is accreted from the large-scale molecular cloud, through the circumstellar disk onto the central star.
Aims: We constrain the masses of the envelopes, disks, and central stars of a sample of low-mass protostars and compare the results to theoretical models for the evol…
The great observatories origins deep survey. VLT/VIMOS spectroscopy in the GOODS-south field
Daddi, E.; Popesso, P.; Cesarsky, C. +10 more
Aims: We present the first results from the VIsible Multiobject Spectrograph (VIMOS) ESO/GOODS program of spectroscopy for faint galaxies in the Chandra Deep Field South (CDF-S). This program complements the FORS2 ESO/GOODS campaign.
Methods: All 3312 spectra were obtained in service mode with VIMOS at the ESO/VLT UT3. The VIMOS LR-Blue and MR…
An X-ray view of 82 LINERs with Chandra and XMM-Newton data
Guainazzi, M.; Jiménez-Bailón, E.; González-Martín, O. +2 more
We present the results of a homogeneous X-ray analysis for 82 nearby low-ionisation, narrow emission-line regions (LINERs) selected from the catalogue of Carrillo et al. (1999, Rev. Mex. Astron. Astrofis., 35, 187). All sources have available Chandra (68 sources) and/or XMM-Newton (55 sources) observations. This is the largest sample of LINERs wit…
Binary planetary nebulae nuclei towards the Galactic bulge. II. A penchant for bipolarity and low-ionisation structures
Miszalski, B.; Moffat, A. F. J.; Parker, Q. A. +1 more
Considerable effort has been applied towards understanding the precise shaping mechanisms responsible for the diverse range of morphologies exhibited by planetary nebulae (PNe).
At least 10-20% of PNe have central stars (CSPN) with a close binary companion thought responsible for heavily shaping the ejected PN during common-envelope (CE) evol…The zCOSMOS redshift survey: the role of environment and stellar mass in shaping the rise of the morphology-density relation from z ~ 1
Kneib, J. -P.; Maccagni, D.; Cimatti, A. +57 more
Context: For more than two decades we have known that galaxy morphological segregation is present in the Local Universe. It is important to see how this relation evolves with cosmic time.
Aims: To investigate how galaxy assembly took place with cosmic time, we explore the evolution of the morphology-density relation up to redshift z ~ 1 using …
Transit spectrophotometry of the exoplanet HD 189733b. I. Searching for water but finding haze with HST NICMOS
Vidal-Madjar, A.; Sing, D. K.; Ballester, G. E. +5 more
We present Hubble Space Telescope near-infrared transit photometry of the nearby hot-Jupiter
Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1
Böhringer, H.; Demarco, R.; Lidman, C. +14 more
Context: The galaxy cluster XMMU J2235.3-2557 (hereafter XMM2235), spectroscopically confirmed at z = 1.39, is one of the most distant X-ray selected galaxy clusters. It has been at the center of a multi-wavelength observing campaign with ground and space facilities.
Aims: We characterize the galaxy populations of passive members, the thermody…