Search Publications
Characterization of Optically Selected Star-Forming Knots in (U)LIRGs
Arribas, Santiago; Colina, Luis; Duc, Pierre-Alain +1 more
We present a comprehensive characterization of the general properties (luminosity functions (LFs), mass, size, ages, etc.) of optically selected compact stellar objects (knots) in a representative sample of 32 low-z luminous and ultraluminous infrared galaxies ((U)LIRGs). It is important to understand the formation and evolution of these propertie…
Atmospheric chemistry on Venus, Earth, and Mars: Main features and comparison
Krasnopolsky, Vladimir A.
This paper deals with two common problems and then considers major aspects of chemistry in the atmospheres of Mars and Venus. (1) The atmospheres of the terrestrial planets have similar origins but different evolutionary pathways because of the different masses and distances to the Sun. Venus lost its water by hydrodynamic escape, Earth lost CO
The X-Ray Properties of Typical High-redshift Radio-loud Quasars
Brandt, W. N.; Vignali, C.; Saez, C. +5 more
We report spectral, imaging, and variability results from four new XMM-Newton observations and two new Chandra observations of high-redshift (z >~ 4) radio-loud quasars (RLQs). Our targets span lower, and more representative, values of radio loudness than those of past samples of high-redshift RLQs studied in the X-ray regime. Our spectral anal…
Intercomparison of SCIAMACHY and SIM vis-IR irradiance over several solar rotational timescales
Weber, M.; Pagaran, J.; Harder, J. W. +2 more
The two satellite spectrometers SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) aboard ENVISAT (Environmental Satellite), and SIM (Spectral Irradiance Monitor) aboard SORCE (Solar Radiation and Climate Experiment) observe since 2002 and 2003, respectively, daily solar spectral irradiance (SSI) not only in UV but e…
IGR J11014-6103: a newly discovered pulsar wind nebula?
Walter, R.; Ferrigno, C.; Bozzo, E. +3 more
Context. IGR J11014-6103 is one of the still unidentified hard X-ray INTEGRAL sources, reported for the first time in the 4th IBIS/ISGRI catalog.
Aims: We investigated the nature of IGR J11014-6103 by carrying out a multiwavelength analysis of the available archival observations performed in the direction of the source.
Methods: We prese…
Detecting emission lines with XMM-Newton in 4U 1538-52
Torrejón, J. M.; Osborne, J. P.; Page, K. L. +2 more
Context. The properties of the X-ray emission lines are a fundamental tool for studying the nature of the matter surrounding the neutron star and the phenomena that produce these lines.
Aims: The aim of this work is to analyse the X-ray spectrum of 4U 1538-52 obtained by the XMM-Newton observatory and to look for the presence of diagnostic li…
Secondary chaotic terrain formation in the higher outflow channels of southern circum-Chryse, Mars
Fairén, Alberto G.; Kargel, Jeffrey S.; Baker, Victor R. +7 more
Higher outflow channel dissection in the martian region of southern circum-Chryse appears to have extended from the Late Hesperian to the Middle Amazonian Epoch. These outflow channels were excavated within the upper 1 km of the cryolithosphere, where no liquid water is expected to have existed during these geologic epochs. In accordance with prev…
Large asymmetric polar scarps on Planum Australe, Mars: Characterization and evolution
Kofman, Wlodek; Herique, Alain; Grima, Cyril +6 more
Numerous scarps with similar characteristics have been observed in the polar layered deposits of Planum Australe, Mars. They are referred to as LAPSs (for Large Asymmetric Polar Scarps) because of their typical cross-section featuring a trough between a straight slope on one side with outcrops of layered deposits and a convex slope on the other si…
Differential Morphology Between Rest-frame Optical and Ultraviolet Emission from 1.5 < z < 3 Star-forming Galaxies
Koekemoer, Anton M.; Gawiser, Eric; Bond, Nicholas A.
We present the results of a comparative study of the rest-frame optical and rest-frame ultraviolet morphological properties of 117 star-forming galaxies (SFGs), including BX, BzK, and Lyman break galaxies with B < 24.5, and 15 passive galaxies in the region covered by the Wide Field Camera 3 Early Release Science program. Using the internal col…
VLT optical BVR observations of two bright supernova Ia hosts in the Virgo cluster. Surface brightness fluctuation analysis
Cantiello, M.; Brocato, E.; Raimondo, G. +1 more
Aims: We study the characteristics of field stars in the two bright ellipticals NGC 4621 and NGC 4374 in the Virgo cluster to derive accurate distances and stellar population properties. Moreover, since the target galaxies have hosted three type Ia supernova events, we investigate the possible correlations between the SNe Ia properties and th…