Search Publications
Early-type Galaxies at z ~ 1.3. IV. Scaling Relations in Different Environments
Demarco, R.; Tanaka, M.; Rosati, P. +15 more
We present the Kormendy and mass-size relations (MSR) for early-type galaxies (ETGs) as a function of environment at z ~ 1.3. Our sample includes 76 visually classified ETGs with masses 1010 < M/M ⊙ < 1011.5, selected in the Lynx supercluster and in the Great Observatories Origins Deep Survey/Chandra Deep Fie…
Magnetotail dipolarization front and associated ion reflection: Particle-in-cell simulations
Shay, M. A.; Wu, P.
For the Earth magnetotail, the Svenes et al. (2008) statistical study infers the lobe density to be highly variable, in the range of 0.007-0.092 cm-3. Such lobe density variation modifies reconnection diffusion region physical processes and reconnection rate drastically. This letter addresses observable reconnection signatures in the vi…
The structure of Titan’s atmosphere from Cassini radio occultations: Occultations from the Prime and Equinox missions
French, Richard G.; Flasar, F. Michael; Marouf, Essam A. +7 more
We present the results of six soundings of the atmosphere of Titan by the radio occultation technique using the Cassini spacecraft currently in orbit around Saturn. These occultations occurred during four separate targeted Titan encounters in both the Prime and Equinox missions of Cassini over 3 years. They cover a wide range of latitude from 75°S…
An independent distance estimate to CW Leonis
Blommaert, J. A. D. L.; Olofsson, G.; Gomez, H. L. +13 more
CW Leo has been observed six times between October 2009 and June 2012 with the SPIRE instrument on board the Herschel satellite. Variability has been detected in the flux emitted by the central star with a period of 639 ± 4 days, in good agreement with determinations in the literature. Variability is also detected in the bow shock around CW Leo th…
The XMM deep survey in the CDF-S. II. A 9-20 keV selection of heavily obscured active galaxies at z > 1.7
Brandt, W. N.; Vignali, C.; Gilli, R. +10 more
We present results on a search of heavily obscured active galaxies z > 1.7 using the rest-frame 9-20 keV excess for X-ray sources detected in the deep XMM-CDFS survey. Out of 176 sources selected with the conservative detection criteria (>8σ) in the first source catalogue of Ranalli et al. (in prep.), 46 objects lie in the redshift range of …
The Spectral Energy Distributions of White Dwarfs in 47 Tucanae: The Distance to the Cluster
Anderson, J.; Tremblay, P. -E.; Stetson, P. B. +13 more
We present a new distance determination to the Galactic globular cluster 47 Tucanae by fitting the spectral energy distributions of its white dwarfs (WDs) to pure hydrogen atmosphere WD models. Our photometric data set is obtained from a 121-orbit Hubble Space Telescope program using the Wide Field Camera 3 UVIS/IR channels, capturing F390W, F606W…
Late Hesperian aqueous alteration at Majuro crater, Mars
Mangold, N.; Poulet, F.; Ansan, V. +3 more
Impact craters cover a large portion of the surface of Mars and could constitute a significant exobiology research target as their formation provided heat sources for aqueous processes. To date, only rare examples of hydrothermal alteration in craters have been reported on Mars while many studies have focused on modeling their effect. Using data f…
A Herschel Survey of Cold Dust in Disks around Brown Dwarfs and Low-mass Stars
Pascucci, Ilaria; Henning, Thomas; Ménard, François +6 more
We report the complete photometric results from our Herschel study which is the first comprehensive program to search for far-infrared emission from cold dust around young brown dwarfs (BDs). We surveyed 50 fields containing 51 known or suspected BDs and very low mass stars that have evidence of circumstellar disks based on Spitzer photometry and/…
Luminous and High Stellar Mass Candidate Galaxies at z ≈ 8 Discovered in the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey
Papovich, Casey; Finkelstein, Steven L.; Dickinson, Mark +26 more
One key goal of the Hubble Space Telescope Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey is to track galaxy evolution back to z ≈ 8. Its two-tiered "wide and deep" strategy bridges significant gaps in existing near-infrared surveys. Here we report on z ≈ 8 galaxy candidates selected as F105W-band dropouts in one of its deep fields…
The Unusual Temporal and Spectral Evolution of SN2011ht. II. Peculiar Type IIn or Impostor?
Humphreys, Roberta M.; Davidson, Kris; Pogge, R. W. +4 more
SN2011ht has been described both as a true supernova (SN) and as an impostor. In this paper, we conclude that it does not match some basic expectations for a core-collapse event. We discuss SN2011ht's spectral evolution from a hot dense wind to a cool dense wind, followed by the post-plateau appearance of a faster low density wind during a rapid d…