Search Publications
The radio continuum spectrum of Mira A and Mira B up to submillimeter wavelengths
Planesas, P.; Alcolea, J.; Bachiller, R.
Aims: We present new measurements of the flux densities at submillimeter wavelengths based on ALMA band 7 (338 GHz, λ0.89 mm) and band 9 (679 GHz, λ0.44 mm) observations to better constrain the origin of the continuum emission of the Mira AB binary system and to check its orbit.
Methods: We have measured the Mira A and Mira B continuum i…
NuSTAR and XMM-Newton observations of the ultraluminous X-ray source NGC 5643 X-1
Krivonos, Roman; Sazonov, Sergey
We present a high-quality hard X-ray spectrum of the ultraluminous X-ray source (ULX) NGC 5643 X-1 measured with NuSTAR in 2014 May-June. We have obtained this spectrum by carefully separating the signals from the ULX and from the active nucleus of its host galaxyNGC 5643 located 0.8 arcmin away. Together with long XMM-Newton observations performe…
CME flux rope and shock identifications and locations: Comparison of white light data, Graduated Cylindrical Shell model, and MHD simulations
St. Cyr, O. C.; Gopalswamy, N.; Cairns, Iver H. +2 more
Coronal mass ejections (CMEs) are major transient phenomena in the solar corona that are observed with ground-based and spacecraft-based coronagraphs in white light or with in situ measurements by spacecraft. CMEs transport mass and momentum and often drive shocks. In order to derive the CME and shock trajectories with high precision, we apply the…
The soft X-ray spectrum of the high-mass X-ray binary V0332+53 in quiescence
Heinke, Craig O.; Elshamouty, Khaled G.; Chouinard, Rhys
The behaviour of neutron stars in high-mass X-ray binaries (HMXBs) during periods of low mass transfer is of great interest. Indications of spectral softening in systems at low mass-transfer rates suggest that some HMXBs are undergoing fundamental changes in their accretion regime, but the nature of the quiescent X-ray emission is not clear. We pe…
A Multiwavelength Characterization of Proto-brown-dwarf Candidates in Serpens
Riaz, B.; Gonzalez-Martin, O.; Caselli, P. +3 more
We present results from a deep submillimeter survey in the Serpens Main and Serpens/G3-G6 clusters, conducted with the Submillimetre Common-User Bolometer Array (SCUBA-2) at the James Clerk Maxwell Telescope. We have combined near- and mid-infrared spectroscopy, Herschel PACS far-infrared photometry, submillimeter continuum, and molecular gas line…
Transverse Velocity Shifts in Protostellar Jets: Rotation or Velocity Asymmetries?
De Colle, Fabio; Riera, Angels; Cerqueira, Adriano H.
Observations of several protostellar jets show systematic differences in radial velocity transverse to the jet propagation direction that have been interpreted as evidence of rotation in the jets. In this paper we discuss the origin of these velocity shifts, and show that they could originate from rotation in the flow, or from side-to-side asymmet…
The Gamma-Ray Source AGL J2241+4454 as the Possible Counterpart of MWC 656
Verrecchia, F.; Sabatini, S.; Pittori, C. +5 more
AGILE discovered the transient source AGL J2241+4454 in 2010, which triggered the study of the associated field allowing for the discovery of the first Be/black hole binary system: MWC 656. This binary was suggested to be the counterpart of AGL J2241+4454, but this association is still not robust. In this work we explore the archival AGILE and Fer…
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud
Mikołajewska, Joanna; Chernyakova, Maria; Zdziarski, Andrzej A. +6 more
We have analysed the Fermi Large Area Telescope (LAT) data on the SNR G73.9+0.9. We have confirmed a previous detection of high-energy γ-rays from this source at a high significance of ≃12σ. The observed spectrum shows a significant curvature, peaking in EFE at ∼1 GeV. We have also calculated the flux upper limits in the mm-wavelength a…
Atomic data and density diagnostics for S IV
Del Zanna, G.; Badnell, N. R.
We present a new large-scale R-matrix scattering calculation for S IV. We used the intermediate-coupling frame transformation method and applied term energy corrections. Our calculation has a much larger configuration-interaction and close-coupling expansion than previous calculations. Despite that, we find good agreement in the predicted intensit…
An empirical model of ion plasma in the inner magnetosphere derived from CRRES/MICS measurements
Fennell, J. F.; Claudepierre, S. G.; Chen, M. W. +1 more
We describe an empirical model of energetic ion plasma (∼20-400 keV/q) that is constructed from measurements taken by the Magnetospheric Ion Composition Spectrometer (MICS) instrument that flew on the CRRES spacecraft. This is a unique data set in that it provides energetic ion composition in the near-equatorial ring current region during a very a…