Search Publications
Herschel-Planck dust optical depth and column density maps. II. Perseus
Alves, João; Bouy, Hervé; Lada, Charles J. +2 more
We present optical depth and temperature maps of the Perseus molecular cloud, obtained combining dust emission data from the Herschel and Planck satellites and 2MASS/NIR dust extinction maps. The maps have a resolution of 36 arcsec in the Herschel regions, and of 5 arcmin elsewhere. The dynamic range of the optical depth map ranges from 1 × 10
Unexpected and significant findings in comet 67P/Churyumov-Gerasimenko: an interdisciplinary view
Fulchignoni, M.; Grün, E.; Altobelli, N. +5 more
ESA's Rosetta Mission has followed Comet 67P/Churyumov-Gerasimenko from 3.6 au inbound to 3.6 au outbound. Many results are largely unexpected, as compared to previous models based on in situ and ground-based observations of Jupiter-family comets. The main topics discussed in this review are (1) the importance of the large concavities characterizi…
Satellite Quenching and Galactic Conformity at 0.3 < z < 2.5
Papovich, Casey; Kelson, Daniel D.; Kacprzak, Glenn G. +21 more
We measure the evolution of the quiescent fraction and quenching efficiency of satellites around star-forming and quiescent central galaxies with stellar mass {log}({M}{cen}/{M}⊙ )\gt 10.5 at 0.3\lt z\lt 2.5. We combine imaging from three deep near-infrared-selected surveys (ZFOURGE/CANDELS, Ultra Deep Survey, and UltraVISTA)…
Observations and modeling of northern mid-latitude recurring slope lineae (RSL) suggest recharge by a present-day martian briny aquifer
Michaels, Timothy I.; Hanley, Jennifer; Grimm, Robert E. +1 more
Recurring slope lineae (RSL) are narrow (0.5-5 m) dark features on Mars that incrementally lengthen down steep slopes, fade in colder seasons, and recur annually. These features have been identified from the northern to southern mid-latitudes. Here, we describe how observations of northern mid-latitude RSL in northern Chryse Planitia and southwest…
Influence of Venus topography on the zonal wind and UV albedo at cloud top level: The role of stationary gravity waves
Bertaux, Jean-Loup; Fedorova, A.; Lebonnois, S. +6 more
Based on the analysis of UV images (at 365 nm) of Venus cloud top (altitude 67 ± 2 km) collected with Venus Monitoring Camera on board Venus Express (VEX), it is found that the zonal wind speed south of the equator (from 5°S to 15°S) shows a conspicuous variation (from -101 to -83 m/s) with geographic longitude of Venus, correlated with the underl…
Constraints on the location of a possible 9th planet derived from the Cassini data
Laskar, J.; Fienga, A.; Manche, H. +1 more
To explain the unusual distribution of Kuiper belt objects, several authors have advocated the existence of a super-Earth planet in the outer solar system. It has recently been proposed that a 10 M⊕ object with an orbit of 700 AU semi major axis and 0.6 eccentricity can explain the observed distribution of Kuiper belt objects around Sed…
Recent shallow moonquake and impact-triggered boulder falls on the Moon: New insights from the Schrödinger basin
Head, James W.; Kiran Kumar, A. S.; Amitabh +8 more
Shallow moonquakes are thought to be of tectonic origin. However, the geologic structures responsible for these moonquakes are unknown. Here we report sites where moonquakes possibly occurred along young lobate scarps in the Schrödinger basin. Our analysis of Lunar Reconnaissance Orbiter and Chandrayaan-1 images revealed four lobate scarps in diff…
The XMM Cluster Outskirts Project (X-COP): Physical conditions of Abell 2142 up to the virial radius
Hurier, G.; Pointecouteau, E.; Rossetti, M. +9 more
Context. Galaxy clusters are continuously growing through the accretion of matter in their outskirts. This process induces inhomogeneities in the gas density distribution (clumping) that need to be taken into account to recover the physical properties of the intracluster medium (ICM) at large radii.
Aims: We studied the thermodynamic properti…
Planck intermediate results. XXXI. Microwave survey of Galactic supernova remnants
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +160 more
The all-sky Planck survey in 9 frequency bands was used to search for emission from all 274 known Galactic supernova remnants. Of these, 16 were detected in at least two Planck frequencies. The radio-through-microwave spectral energy distributions were compiled to determine the mechanism for microwave emission. In only one case, IC 443, is there h…
Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)
Werner, K.; Strassmeier, K. G.; Lammer, H. +29 more
The article presents a review of scientific problems and methods of ultraviolet astronomy, focusing on perspective scientific problems (directions) whose solution requires UV space observatories. These include reionization and the history of star formation in the Universe, searches for dark baryonic matter, physical and chemical processes in the i…