Search Publications
XMM-Newton Observations of MBM 12: More Constraints on the Solar Wind Charge Exchange and Local Bubble Emissions
Snowden, Steven L.; Smith, Randall K.; Plucinsky, Paul P. +3 more
We present the first analysis of an XMM-Newton observation of the nearby molecular cloud MBM 12. We find that in the direction of MBM 12 the total O VII (0.57 keV) triplet emission is 1.8+0.5 -0.6 photons cm-2 s-1 sr-1 (or line units, LU) while for the O VIII (0.65 keV) line emission we find a…
A model of electromagnetic electron phase-space holes and its application
Glassmeier, K. -H.; Le Contel, O.; Baumjohann, W. +12 more
Electron phase-space holes (EHs) are indicators of nonlinear activities in space plasmas. Most often they are observed as electrostatic signals, but recently Andersson et al. [2009] reported electromagnetic EHs observed by the THEMIS mission in the Earth's plasma sheet. As a follow-up to Andersson et al. [2009], this paper presents a model of elec…
The Vela and Geminga pulsars in the mid-infrared
Zharikov, S. V.; Shibanov, Yu. A.; Zyuzin, D. A. +1 more
The Vela and Geminga pulsars are rotation-powered neutron stars, which have been identified in various spectral domains, from the near-infrared to hard γ-rays. In the near-infrared, they exhibit tentative emission excesses, as compared to the optical range. To check whether these features are real, we analysed archival mid-infrared broad-band imag…
Transiting exoplanets from the CoRoT space mission. XVII. The hot Jupiter CoRoT-17b: a very old planet
Mazeh, T.; Aigrain, S.; Alonso, R. +49 more
We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of 2.43 ± 0.30 MJup and a radius of 1.02 ± 0.07 RJup, while its mean density is 2.82 ± 0.38 g/cm3. CoRoT-17b is in a circular orbit with a period of 3.7681 ± 0.0003 days. The host star is an old (10…
Dark matter halos around isolated ellipticals
Babić, A.; Memola, E.; Salucci, P.
Aims: We investigate the distribution of the luminous and the dark matter components in the isolated ellipticals NGC 7052 and NGC 7785, which are embedded in an emitting hot gas halo, by means of relevant X-ray and photometric data.
Methods: To calculate the dark matter distribution in these rare objects, we performed an improved X-ray a…
A 2D multiwavelength study of the ionized gas and stellar population in the giant H II region NGC 588
Monreal-Ibero, A.; Relaño, M.; Kehrig, C. +5 more
Giant H II regions (GHIIRs) in nearby galaxies are a local sample in which we can study in detail processes in the interaction of gas, dust and newly formed stars which are analogous to those which occurred in episodes of higher intensity in which much of the current stellar population was born. Here, we present an analysis of NGC 588, a GHIIR in …
The M 33 Synoptic Stellar Survey. I. Cepheid Variables
Macri, Lucas M.; Pellerin, Anne
We have conducted a ground-based BVI synoptic survey of the Local Group galaxy M 33 which covers most of its disk and spans a period of 7 years. The survey targets luminous, long-period variables such as Cepheids and Miras and combines images from the DIRECT project and follow-up observations at the WIYN 3.5 m telescope. This paper, the first in a…
Timing mirror structures observed by Cluster with a magnetosheath flow model
Budnik, E.; Dandouras, I.; Génot, V. +4 more
The evolution of structures associated with mirror modes during their flow in the Earth's magnetosheath is studied. The fact that the related magnetic fluctuations can take distinct shapes, from deep holes to high peaks, has been assessed in previous works on the observational, modeling and numerical points of view. In this paper we present an ana…
Impacts into non-polar ice-rich paleodeposits on Mars: Excess ejecta craters, perched craters and pedestal craters as clues to Amazonian climate history
Head, James W.; Kadish, Seth J.
We compare three previously independently studied crater morphologies - excess ejecta craters, perched craters, and pedestal craters - each of which has been proposed to form from impacts into an ice-rich surface layer. Our analysis identifies the specific similarities and differences between the crater types; the commonalities provide significant…
Discovery of the first τ Sco analogues: HD 66665 and HD 63425
Wade, G. A.; Ignace, R.; Marcolino, W. L. F. +3 more
The B0.2 V magnetic star τ Sco stands out from the larger population of massive OB stars due to its high X-ray activity, peculiar wind diagnostics and highly complex magnetic field. This Letter presents the discovery of the first two τ Sco analogues - HD 66665 and HD 63425, identified by the striking similarity of their ultraviolet (UV) spectra to…