Search Publications
Modelling the interaction of thermonuclear supernova remnants with circumstellar structures: the case of Tycho's supernova remnant
Kaastra, J. S.; Vink, J.; Chiotellis, A. +2 more
The well-established Type Ia remnant of Tycho's supernova (SN 1572) reveals discrepant ambient medium-density estimates based on either the measured dynamics or the X-ray emission properties. This discrepancy can potentially be solved by assuming that the supernova remnant (SNR) shock initially moved through a stellar wind bubble, but is currently…
Mass/radius Constraints on the Quiescent Neutron Star in M13 Using Hydrogen and Helium Atmospheres
Heinke, C. O.; Sivakoff, G. R.; Servillat, M. +2 more
The mass and radius of the neutron star (NS) in low-mass X-ray binaries can be obtained by fitting the X-ray spectrum of the NS in quiescence, and the mass and radius constrains the properties of dense matter in NS cores. A critical ingredient for spectral fits is the composition of the NS atmosphere: hydrogen atmospheres are assumed in most prior…
Gaseous CO Abundance—An Evolutionary Tracer for Molecular Clouds
Liu, Tie; Wu, Yuefang; Zhang, Huawei
Planck cold clumps are among the most promising objects to investigate the initial conditions of the evolution of molecular clouds. In this work, by combing the dust emission data from the survey of the Planck satellite with the molecular data of 12CO/13CO/C18O (1-0) lines from observations with the Purple Mountain…
Probing the Interstellar Medium of z ~ 1 Ultraluminous Infrared Galaxies through Interferometric Observations of CO and Spitzer Mid-infrared Spectroscopy
Kirkpatrick, Allison; Dickinson, Mark E.; Daddi, Emanuele +8 more
We explore the relationship between gas, dust, and star formation in a sample of 12 ultraluminous infrared galaxies (ULIRGs) at high-redshift compared to a similar sample of local galaxies. We present new CO observations and/or Spitzer mid-IR spectroscopy for six 70 µm selected galaxies at z ~ 1 in order to quantify the properties of the mol…
Flow bouncing and electron injection observed by Cluster
Petrukovich, A. A.; Daly, P. W.; Khotyaintsev, Y. +14 more
Characteristics of particles and fields in the flow-bouncing region are studied based on multipoint observations from Cluster located at 13-15RE downtail during a substorm event around 12:50 UT on 7 September 2007. The Cluster spacecraft were separated by a distance of up to 10,000 km and allowed to determine the mesoscale evolution of …
Large-scale environments of binary AGB stars probed by Herschel. I. Morphology statistics and case studies of R Aquarii and W Aquilae
Blommaert, J. A. D. L.; Jorissen, A.; Ottensamer, R. +14 more
The Mass loss of Evolved StarS (MESS) sample offers a selection of 78 asymptotic giant branch (AGB) stars and red supergiants (RSGs) observed with the PACS photometer on-board Herschel at 70 µm and 160 µm. For most of these objects, the dusty AGB wind is not spherically symmetric and the wind shape can be subdivided into four classes. …
An analysis of star formation with Herschel in the Hi-GAL survey. I. The science demonstration phase fields
Paladini, R.; Piacentini, F.; Elia, D. +8 more
Aims: The Herschel survey of the Galactic plane (Hi-GAL) provides a unique opportunity to study star formation over large areas of the sky and different environments in the Milky Way. We use the best-studied Hi-GAL fields to date, two 2°·2° tiles centered on (ℓ, b) = (30°, 0°) and (ℓ, b) = (59°, 0°), to study the star formation activity in th…
Characterization of the optical and X-ray properties of the north-western wisps in the Crab nebula
Bucciantini, N.; Weisskopf, M. C.; Idec, W. +4 more
We have studied the wisps to the north-west of the Crab pulsar as part of a multiwavelength campaign in the visible and in X-rays. Optical observations were obtained using the Nordic Optical Telescope in La Palma and X-ray observations were made with the Chandra X-ray Observatory. The observing campaign took place from 2010 October until 2012 Sept…
Far-infrared-detected Lyman-break galaxies at z ~ 3. Dust attenuation and dust correction factors at high redshift
Cepa, J.; Oteo, I.; Ederoclite, A. +7 more
Lyman-break galaxies (LBGs) represent one of the kinds of star-forming galaxies that are found in the high-redshift universe. The detection of LBGs in the far-infrared (FIR) domain can provide very important clues on their dust attenuation and total star-formation rate (SFR), allowing a more detailed study than has been performed so far. In this w…
SDO/AIA and Hinode/EIS Observations of Interaction between an EUV Wave and Active Region Loops
Li, Ting; Zhang, Jun; Liu, Wei +2 more
We present detailed analysis of an extreme-ultraviolet (EUV) wave and its interaction with active region (AR) loops observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Hinode EUV Imaging Spectrometer (EIS). This wave was initiated from AR 11261 on 2011 August 4 and propagated at velocities of 430-910 km s-1. …