Search Publications
Saturn’s icy satellites investigated by Cassini-VIMS. II. Results at the end of nominal mission
Brown, R. H.; Buratti, B. J.; Clark, R. N. +12 more
We report the detailed analysis of the spectrophotometric properties of Saturn's icy satellites as derived by full-disk observations obtained by visual and infrared mapping spectrometer (VIMS) experiment aboard Cassini. In this paper, we have extended the coverage until the end of the Cassini's nominal mission (June 1st 2008), while a previous pap…
Spectroscopic Abundances and Membership in the Wolf 630 Moving Group
King, Jeremy R.; Bubar, Eric J.
The concept of kinematic assemblages evolving from dispersed stellar clusters has remained contentious since Eggen's initial formulation of moving groups in the 1960s. With high-quality parallaxes from the Hipparcos space astrometry mission, distance measurements for thousands of nearby, seemingly isolated stars are currently available. With these…
Herschel/HIFI observations of Mars: First detection of O2 at submillimetre wavelengths and upper limits on HCl and H2O2
Blommaert, J. A. D. L.; Küppers, M.; Thomas, N. +47 more
We report on an initial analysis of Herschel/HIFI observations of hydrogen chloride (HCl), hydrogen peroxide (H2O2), and molecular oxygen (O2) in the Martian atmosphere performed on 13 and 16 April 2010 (Ls ~ 77°). We derived a constant volume mixing ratio of 1400 ± 120 ppm for O2 and determin…
Chandra Observations of 3C Radio Sources with z < 0.3: Nuclei, Diffuse Emission, Jets, and Hotspots
Macchetto, F. D.; Capetti, A.; Gilli, R. +11 more
We report on our Chandra Cycle 9 program to observe half of the 60 (unobserved by Chandra) 3C radio sources at z < 0.3 for 8 ks each. Here we give the basic data: the X-ray intensity of the nuclei and any features associated with radio structures such as hotspots and knots in jets. We have measured fluxes in soft, medium, and hard bands and are…
Extreme flux states of NGC 4151 observed with INTEGRAL
Paltani, S.; Walter, R.; Ferrigno, C. +5 more
We present a comprehensive spectral analysis of all INTEGRAL data obtained so far for the X-ray-bright Seyfert galaxy NGC 4151. We also use all contemporaneous data from RXTE, XMM-Newton, Swift and Suzaku. We find a linear correlation between the medium- and hard-energy X-ray fluxes measured by INTEGRAL, which indicates an almost constant spectral…
K+a galaxies in the zCOSMOS survey . Physical properties of systems in their post-starburst phase
Bondi, M.; Kneib, J. -P.; Maccagni, D. +60 more
Aims: The identities of the main processes triggering and quenching star-formation in galaxies remain unclear. A key stage in evolution, however, appears to be represented by post-starburst galaxies. To investigate the prevalence of these galaxies and their impact on galaxy evolution in general, we initiated a multiwavelength study of galaxie…
Panchromatic Observations and Modeling of the HV Tau C Edge-on Disk
Pinte, C.; Ménard, F.; Duchêne, G. +12 more
We present new high spatial resolution (lsim0farcs1) 1-5 µm adaptive optics images, interferometric 1.3 mm continuum and 12CO 2-1 maps, and 350 µm, 2.8 and 3.3 mm fluxes measurements of the HV Tau system. Our adaptive optics images unambiguously demonstrate that HV Tau AB-C is a common proper motion pair. They further reveal…
NGC 6240: merger-induced star formation and gas dynamics
Genzel, R.; Sturm, E.; Tacconi, L. J. +9 more
We present spatially resolved integral field spectroscopic K-band data at a resolution of 0.13” (60 pc) and interferometric CO(2-1) line observations of the prototypical merging system NGC 6240. Despite the clear rotational signature, the stellar kinematics in the two nuclei are dominated by dispersion. We use Jeans modelling to derive the masses …
Hard X-ray properties of magnetic cataclysmic variables
Hill, A. B.; Knigge, C.; Bird, A. J. +10 more
Hard X-ray surveys have proven remarkably efficient in detecting intermediate polars and asynchronous polars, two of the rarest type of cataclysmic variable (CV). Here, we present a global study of hard X-ray-selected intermediate polars and asynchronous polars, focusing particularly on the link between hard X-ray properties and spin/orbital perio…
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C
Menten, K. M.; Boulanger, F.; Falgarone, E. +72 more
We present Herschel/HIFI observations of the fundamental rotational transitions of ortho- and para-H_216O and H_218O in absorption towards Sagittarius B2(M) and W31C. The ortho/para ratio in water in the foreground clouds on the line of sight towards these bright continuum sources is generally consistent with the statistical …