Search Publications
Fe K and ejecta emission in SNR G15.9+0.2 with XMM-Newton
Acero, Fabio; Maggi, Pierre
Aims: We present a study of the Galactic supernova remnant SNR G15.9+0.2 with archival XMM-Newton observations.
Methods: EPIC data are used to investigate the morphological and spectral properties of the remnant, searching in particular for supernova ejecta and Fe K line emission. By comparing the SNR's X-ray absorption column density wi…
Interstellar medium conditions in z 0.2 Lyman-break analogs
Berta, S.; Magnelli, B.; Lutz, D. +16 more
We present an analysis of far-infrared (FIR) [CII] and [OI] fine structure line and continuum observations obtained with Herschel/PACS, and 12CO(1-0) observations obtained with the IRAM Plateau de Bure Interferometer, of Lyman-break analogs (LBAs) at z 0.2. The principal aim of this work is to determine the typical interstellar medium (…
The chemical structure of the Class 0 protostellar envelope NGC 1333 IRAS 4A
Caux, E.; van der Tak, F. F. S.; Boogert, A. C. A. +2 more
Context. It is not well known what drives the chemistry of a protostellar envelope, in particular the role of the stellar mass and the protostellar outflows on the chemical enrichment of such environments.
Aims: We study the chemical structure of the Class 0 protostellar envelope NGC 1333 IRAS 4A in order to (I) investigate the influence of t…
Transit probabilities around hypervelocity and runaway stars
Ginsburg, I.; Fragione, G.
In the blooming field of exoplanetary science, NASA's Kepler Space Telescope has revolutionized our understanding of exoplanets. Kepler's very precise and long-duration photometry is ideal for detecting planetary transits around Sun-like stars. The forthcoming Transiting Exoplanet Survey Satellite (TESS) is expected to continue Kepler's legacy. Al…
A search for pre- and proto-brown dwarfs in the dark cloud Barnard 30 with ALMA
Ménard, F.; de Gregorio-Monsalvo, I.; Eiroa, C. +9 more
Context. The origin of brown dwarfs is still under debate. While some models predict a star-like formation scenario, others invoke a substellar mass embryo ejection, a stellar disk fragmentation, or the photo-evaporation of an external core due to the presence of massive stars.
Aims: The aim of our work is to characterize the youngest and low…
Setting the scene: what did we know before Rosetta?
Meech, K. J.
This paper provides an overview of our state of knowledge about comets prior to the Rosetta mission encounter. Starting with the historical perspective, this paper discusses the development of comet science up to the modern era of space exploration. The extent to which comets are tracers of solar system formation processes or preserve pristine int…
The CO2 absorption spectrum in the 2.3 µm transparency window by high sensitivity CRDS: (II) Self-absorption continuum
Campargue, A.; Vasilchenko, S.; Mondelain, D. +2 more
The CO2 absorption continuum near 2.3 µm is determined for a series of sub atmospheric pressures (250-750 Torr) by high sensitivity Cavity Ring Down Spectroscopy. An experimental procedure consisting in injecting successively a gas flow of CO2 and synthetic air, keeping constant the gas pressure in the CRDS cell, has be…
A Multi-band Study of the Remarkable Jet in Quasar 4C+19.44
Cheung, C. C.; Uchiyama, Y.; Siemiginowska, A. +14 more
We present arcsecond-resolution data in the radio, IR, optical, and X-ray for 4C+19.44 (=PKS 1354+195), the longest and straightest quasar jet with deep X-ray observations. We report results from radio images with half to one arcsecond angular resolution at three frequencies, plus Hubble Space Telescope and Spitzer data. The Chandra data allow us …
The 2013 February 17 Sunquake in the Context of the Active Region's Magnetic Field Configuration
Guglielmino, S. L.; Green, L. M.; Valori, G. +3 more
Sunquakes are created by the hydrodynamic response of the lower atmosphere to a sudden deposition of energy and momentum. In this study, we investigate a sunquake that occurred in NOAA active region 11675 on 2013 February 17. Observations of the corona, chromosphere, and photosphere are brought together for the first time with a nonlinear force-fr…
Comparison of CME and ICME Structures Derived from Remote-Sensing and In Situ Observations
Bothmer, V.; Mrotzek, N.
We present results from the comparison of the near-Sun and in situ analysis of two Earth-directed coronal mass ejections (CMEs) with different 3D orientations and solar source region characteristics. The CME on 14 July 2000, the so-called Bastille Day storm, a well-studied event, was observed from a single-point perspective by the Large Angle and …