Search Publications
The Orion fingers: Near-IR adaptive optics imaging of an explosive protostellar outflow
Ginsburg, Adam; Youngblood, Allison; Bally, John +1 more
Aims: Adaptive optics (AO) images are used to test the hypothesis that the explosive BN/KL outflow from the Orion OMC1 cloud core was powered by the dynamical decay of a non-hierarchical system of massive stars.
Methods: Narrow-band H2, [Fe ii], and broad-band Ks obtained with the Gemini South multi-conjugate AO sys…
Rosetta observations of solar wind interaction with the comet 67P/Churyumov-Gerasimenko
Behar, E.; Goldstein, R.; Mokashi, P. +7 more
Context. The Rosetta spacecraft arrived at the comet 67P/Churyumov-Gerasimenko on August 6, 2014, which has made it possible to perform the first study of the solar wind interacting with the coma of a weakly outgassing comet.
Aims: It is shown that the solar wind experiences large deflections (>45°) in the weak coma. The average ion veloci…
Evidence for feedback in action from the molecular gas content in the z ~ 1.6 outflowing QSO XID2028
Lutz, D.; Daddi, E.; Maiolino, R. +16 more
Aims: Gas outflows are believed to play a pivotal role in shaping galaxies, as they regulate both star formation and black hole growth. Despite their ubiquitous presence, the origin and the acceleration mechanism of these powerful and extended winds is not yet understood. Direct observations of the cold gas component in objects with detected …
Hard X-ray polarimetry with Astrosat-CZTI
Rao, A. R.; Bhattacharya, D.; Vadawale, S. V. +5 more
X-ray polarimetry is largely an unexplored area of an otherwise mature field of X-ray astronomy. Except for a few early attempts during the 1970s, no dedicated X-ray polarimeter has been flown during the past four decades. On the other hand, the scientific value of X-ray polarization measurement has been well known for a long time, and there has b…
Solar wind sputtering of dust on the surface of 67P/Churyumov-Gerasimenko
De Keyser, Johan; Gombosi, Tamas I.; Berthelier, Jean-Jacques +16 more
Aims: Far away from the Sun, at around 3 AU, the activity of comet 67P/Churyumov-Gerasimenko is low and changes with local time (solar insolation), with location (chemical heterogeneity of the surface), and with season. When the activity is very low because the total cross section of the comet against the Sun is small, the solar wind has acce…
High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
Schmitt, J. H. M. M.; Czesla, S.; Salz, M. +1 more
Giant gas planets in close proximity to their host stars experience strong irradiation. In extreme cases photoevaporation causes a transonic, planetary wind and the persistent mass loss can possibly affect the planetary evolution. We have identified nine hot Jupiter systems in the vicinity of the Sun, in which expanded planetary atmospheres should…
Galactic cold cores. VI. Dust opacity spectral index
Juvela, M.; Marshall, D. J.; Paladini, R. +13 more
Context. The Galactic Cold Cores project has carried out Herschel photometric observations of 116 fields where the Planck survey has found signs of cold dust emission. The fields contain sources in different environments and different phases of star formation. Previous studies have revealed variations in their dust submillimetre opacity.
Aims…
Comet 67P/Churyumov-Gerasimenko: Constraints on its origin from OSIRIS observations
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +38 more
Context. One of the main aims of the ESA Rosetta mission is to study the origin of the solar system by exploring comet 67P/Churyumov-Gerasimenko at close range.
Aims: In this paper we discuss the origin and evolution of comet 67P/Churyumov-Gerasimenko in relation to that of comets in general and in the framework of current solar system format…
Suprathermal electron environment of comet 67P/Churyumov-Gerasimenko: Observations from the Rosetta Ion and Electron Sensor
Frahm, R. A.; Goldstein, R.; Mokashi, P. +9 more
Context. The Rosetta spacecraft is currently escorting comet 67P/Churyumov-Gerasimenko until its perihelion approach at 1.2 AU. This mission has provided unprecedented views into the interaction of the solar wind and the comet as a function of heliocentric distance.
Aims: We study the interaction of the solar wind and comet at large heliocent…
THOR: The H i, OH, Recombination line survey of the Milky Way. The pilot study: H i observations of the giant molecular cloud W43
Menten, K. M.; Hill, T.; Henning, T. +30 more
To study the atomic, molecular, and ionized emission of giant molecular clouds (GMCs) in the Milky Way, we initiated a large program with the Karl G. Jansky Very Large Array (VLA): "THOR: The H i, OH, Recombination line survey of the Milky Way". We map the 21 cm H i line, 4 OH lines, up to 19 Hα recombination lines and thecontinuum from 1 to 2 GHz…