Search Publications
Missions
Journals
Publication Years
On the existence of bright IR galaxies at z > 2: tension between Herschel and SCUBA-2 results?
Pozzi, Francesca; Gruppioni, Carlotta
Recent derivations of the galaxy star formation rate density (SFRD) obtained from sub-millimetre (sub-mm) surveys (e.g. SCUBA-2) show a tension with previous works based on Herschel and multi-wavelength data. Some of these works claim that the SFRD derived by pushing the Herschel surveys beyond z ≃ 2 are incorrect. However, the current sub-mm surv…
Elliptical Galaxy in the Making: The Dual Active Galactic Nuclei and Metal-enriched Halo of Mrk 273
Veilleux, Sylvain; Liu, Weizhe; Rupke, David S. N. +7 more
A systematic analysis of the X-ray emission from the nearby ultraluminous infrared galaxy Mrk 273 was carried out by combining new 200 ks Chandra data with archived 44 ks data. The active galactic nucleus (AGN) associated with the southwest nucleus is confirmed by the new data, and a secondary hard X-ray (4-8 keV) point source is detected, coincid…
Building a cluster: shocks, cavities, and cooling filaments in the group-group merger NGC 6338
Vrtilek, Jan M.; David, Laurence P.; Sun, Ming +4 more
We present deep Chandra, XMM-Newton, Giant Metrewave Radio Telescope, and Hα observations of the group-group merger NGC 6338. X-ray imaging and spectral mapping show that as well as trailing tails of cool, enriched gas, the two cool cores are embedded in an extensive region of shock-heated gas with temperatures rising to ∼5 keV. The velocity distr…
The Dawn of Dust Astronomy
Krüger, Harald; Grün, Eberhard; Srama, Ralf
We review the development of dust science from the first ground-based astronomical observations of dust in space to compositional analysis of individual dust particles and their source objects. A multitude of observational techniques is available for the scientific study of space dust: from meteors and interplanetary dust particles collected in th…
Exospheric Neutral Hydrogen Density at the Nominal 10 RE Subsolar Point Deduced From XMM-Newton X-Ray Observations
Connor, Hyunju K.; Carter, Jennifer A.
We investigate the exospheric neutral density near the subsolar magnetopause, assuming Xgse = 10 RE as its typical location, to support the upcoming Solar wind-Magnetosphere-Ionosphere Link Explorer that will visualize the Earth's magnetosheath and cusps in soft X-rays. Neutral hydrogen density is a key parameter that controls soft X-ra…
A stellar census in globular clusters with MUSE: A spectral catalogue of emission-line sources
Weilbacher, Peter M.; Kollatschny, Wolfram; Kamann, Sebastian +6 more
Aims: Globular clusters produce many exotic stars due to a much higher frequency of dynamical interactions in their dense stellar environments. Some of these objects were observed together with several hundred thousand other stars in our MUSE survey of 26 Galactic globular clusters. Assuming that at least a few exotic stars have exotic spectr…
Discovery and Seismic Analysis of an EL CVn-type Binary with Hybrid δ Sct-γ Dor Pulsations
Chen, X. H.; Wang, K.; Zhang, X. B. +2 more
We report the discovery of an EL CVn-type binary consisting of a low-mass, pre-helium white dwarf and the first detection of hybrid δ Sct-γ Dor pulsations in such binary systems. Based on the four years Kepler data, we determined comprehensive photometric solution of the eclipsing binary KIC 8113154. The light-curve modeling reveals that it is a d…
The volume of water required to carve the martian valley networks: Improved constraints using updated methods
Head, James W.; Rosenberg, Eliott N.; Palumbo, Ashley M. +2 more
The martian valley networks are a key piece of evidence for the presence of liquid water on early Mars, and understanding their formation conditions can provide valuable insight into the nature of the early climate. Previous studies have used various methods to estimate the volume of water required to carve the valley networks, with results rangin…
Two cold belts in the debris disk around the G-type star NZ Lupi
Avenhaus, H.; Augereau, J. -C.; Henning, T. +36 more
Context. Planetary systems hold the imprint of the formation and of the evolution of planets especially at young ages, and in particular at the stage when the gas has dissipated leaving mostly secondary dust grains. The dynamical perturbation of planets in the dust distribution can be revealed with high-contrast imaging in a variety of structures.…
Hybrid modeling of cometary plasma environments. II. Remote-sensing of a cometary bow shock
Kallio, E.; Nilsson, H.; Simon Wedlund, C. +3 more
Context. The ESA Rosetta probe has not seen direct evidence of a fully formed bow shock at comet 67P/Churyumov-Gerasimenko (67P). Ion spectrometer measurements of cometary pickup ions measured in the vicinity of the nucleus of 67P are available and may contain signatures of the large-scale plasma environment.
Aims: The aim is to investigate t…