Search Publications
The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. III. The ultraviolet development from iron curtain through the post-X-ray turnoff
Sion, E. M.; Shore, S. N.; Mason, E. +3 more
We continue the analysis of the multiwavelength evolution of the recurrent nova T Pyx during its 2011 outburst, focussing on the spectral development on the 1150-3000 Å region. This extraordinary data set presents the longest temporal baseline high resolution view of the ultraviolet for any nova to date (classical or recurrent). The observations c…
Transmission and conversion of magnetoacoustic waves on the magnetic canopy in a quiet Sun region
Tziotziou, K.; Tsiropoula, G.; Kontogiannis, I.
Context. We present evidence for the conversion and transmission of wave modes on the magnetic flux tubes that constitute mottles and form the magnetic canopy in a quiet Sun region.
Aims: Our aim is to highlight the details and the key parameters of the mechanism that produces power halos and magnetic shadows around the magnetic network obser…
Thermal structure of a hot non-flaring corona from Hinode/EIS
Del Zanna, G.; Reale, F.; Testa, P. +1 more
Aims: In previous studies, a very hot plasma component has been diagnosed in solar active regions through the images in three different narrow-band channels of Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). This diagnostic from extreme ultraviolet (EUV) imaging data has also been supported by the matching mo…
Origin of the ionized wind in MWC 349A
Martín-Pintado, J.; Planesas, P.; Thum, C. +2 more
The UC-HII region of MWC 349A is the prototype of an ionized wind driven by a massive star surrounded by a disk. Recent high angular resolution observations of the millimeter recombination lines have shown that the disk rotates with a Keplerian law in its outer parts. However, the kinematics of innermost regions in the UC-HII region of MWC 349A is…
Herschel/PACS spectroscopy of trace gases of the stratosphere of Titan
Lara, L. M.; Hartogh, P.; Lellouch, E. +7 more
Aims: We investigate the composition of Titan's stratosphere from new medium-resolution far-infrared observations performed with the full range of Herschel's Photodetector Array Camera and Spectrometer (PACS) (51-220 µm at a resolution λ/Δλ ranging from 950 to 5500 depending on wavelength and grating order).
Methods: Using PACS, we…
Strömgren and near-infrared photometry of metal-rich bulge globular clusters. I. NGC 6528 and its surrounding field
Milone, A. P.; Lagioia, E. P.; Zoccali, M. +9 more
We present Strömgren and near-infrared (NIR) photometry of the bulge cluster NGC 6528 and its surrounding field in Baade's Window. uvby images were collected with EFOSC2 on the New Technology Telescope (NTT, La Silla, ESO). The NIR catalogs are based on J,K-band VIRCAM at VISTA (Paranal, ESO) and SOFI at NTT photometry. We matched the aforemention…
X-ray emission from an FU Orionis star in early outburst: HBC 722
Skinner, Stephen L.; Güdel, Manuel; Green, Joel +1 more
Aims: We conducted the first X-ray observations of the newly erupting FU Ori-type outburst in HBC 722 (V2493 Cyg) with the aim to characterize its X-ray behavior and near-stellar environment during early outburst.
Methods: We used data from the XMM-Newton and Chandra X-ray observatories to measure X-ray source temperatures and luminositi…
Detection of galaxies with Gaia
Ducourant, C.; Krone-Martins, A.; Teixeira, R. +2 more
Aims: Besides its major objective tuned to detecting the stellar galactic population, the Gaia mission experiment will also observe a large number of galaxies. In this work we intend to evaluate the number and the characteristics of the galaxies that will effectively pass the on-board selection algorithm of Gaia.
Methods: The detection o…
Interpreting the extended emission around three nearby debris disc host stars
Eiroa, C.; Marshall, J. P.; Montesinos, B. +7 more
Context. Cool debris discs are a relic of the planetesimal formation process around their host star, analogous to the solar system's Edgeworth-Kuiper belt. As such, they can be used as a proxy to probe the origin and formation of planetary systems like our own.
Aims: The Herschel open time key programmes "DUst around NEarby Stars" (DUNES) and…
The important role of evolution in the Planck YSZ-mass calibration
Andreon, S.
In light of the tension between cosmological parameters from Planck cosmic microwave background and galaxy clusters, we revised the Planck analysis of the YSZ-mass calibration to allow evolution to be determined by the data instead of being imposed as an external constraint. Our analysis uses the very same data and Malmquist bias correc…