Search Publications
Solar Jet-Coronal Hole Collision and a Closely Related Coronal Mass Ejection
Chen, Yao; Zheng, Ruisheng; Du, Guohui +1 more
Jets are defined as impulsive, well-collimated upflows, occurring in different layers of the solar atmosphere with different scales. Their relationship with coronal mass ejections (CMEs), another type of solar impulsive events, remains elusive. Using high-quality imaging data from the Atmospheric Imaging Assembly/Solar Dynamics Observatory, we sho…
Activity from the Be/X-ray binary system V0332+53 during its intermediate-luminosity outburst in 2008
Garrido, R.; Özbey Arabacı, M.; Camero-Arranz, A. +7 more
Aims: We present a study of the Be/X-ray binary system V 0332+53 with the main goal of characterizing its behaviour mainly during the intermediate-luminosity X-ray event in 2008. In addition, we aim to contribute to the understanding of the behaviour of the donor companion by including optical data from our dedicated campaign starting in 2006…
Observed IRIS Profiles of the h and k Doublet of Mg II and Comparison with Profiles from Quiescent Prominence NLTE Models
Heinzel, Petr; Kleint, Lucia; Vial, Jean-Claude +2 more
With the launch of the Interface Region Imaging Spectrograph (IRIS) mission, it is now possible to obtain high-resolution solar prominence spectra and to begin to distinguish the contributions of the many (apparent or not) threads that structure prominences. We aim at comparing unique observations obtained in the Mg II h and k lines of a polar cro…
Characterization of Saturn's bow shock: Magnetic field observations of quasi-perpendicular shocks
Dougherty, M. K.; Masters, A.; Sulaiman, A. H.
Collisionless shocks vary drastically from terrestrial to astrophysical regimes resulting in radically different characteristics. This poses two complexities. First, separating the influences of these parameters on physical mechanisms such as energy dissipation. Second, correlating observations of shock waves over a wide range of each parameter, e…
The ultraluminous X-ray source NGC 5643 ULX1: a large stellar mass black hole accreting at super-Eddington rates?
Pintore, Fabio; Middleton, Matthew J.; Sutton, Andrew D. +3 more
A sub-set of the brightest ultraluminous X-ray sources (ULXs), with X-ray luminosities well above 1040 erg s-1, typically have energy spectra which can be well described as hard power laws, and short-term variability in excess of ∼10 per cent. This combination of properties suggests that these ULXs may be some of the best can…
Suzaku and XMM-Newton observations of the newly discovered early-stage cluster merger of 1E2216.0-0401 and 1E2215.7-0404
Urdampilleta, I.; Kaastra, J. S.; Mernier, F. +6 more
We present the results of Suzaku and XMM-Newton X-ray observations of the cluster pair
Using cm observations to constrain the abundance of very small dust grains in Galactic cold cores
Paladini, R.; Ysard, N.; Laureijs, R. J. +9 more
In this analysis, we illustrate how the relatively new emission mechanism, known as spinning dust, can be used to characterize dust grains in the interstellar medium. We demonstrate this by using spinning dust emission observations to constrain the abundance of very small dust grains (a ≲ 10 nm) in a sample of Galactic cold cores. Using the physic…
Spectral analysis of SMC X-2 during its 2015 outburst
Tiengo, A.; Mereghetti, S.; Sidoli, L. +3 more
We report on the results of XMM-Newton and Swift observations of SMC X-2 during its last outburst in 2015 October, the first one since 2000. The source reached a very high luminosity (L ∼ 1038 erg s-1), which allowed us to perform a detailed analysis of its timing and spectral properties. We obtained a pulse period Pspin…
An induced global magnetic field looping around the magnetotail of Venus
Barabash, Stas; Zhang, Tielong; Rong, Zhaojin +8 more
Venus serves as the prototype of solar wind interaction with unmagnetized planetary bodies with atmospheres. It has no intrinsic dipole or crustal magnetic field; the only magnetic field is believed to be formed by the draped interplanetary magnetic field (IMF). However, the large-scale magnetic field observed over the north polar region of Venus …
Empirically Estimated Far-UV Extinction Curves for Classical T Tauri Stars
France, Kevin; Brown, Alex; Herczeg, Gregory +3 more
Measurements of extinction curves toward young stars are essential for calculating the intrinsic stellar spectrophotometric radiation. This flux determines the chemical properties and evolution of the circumstellar region, including the environment in which planets form. We develop a new technique using H2 emission lines pumped by stell…