Search Publications
Time-resolved spectral catalogue of INTEGRAL/SPI gamma-ray bursts
Greiner, Jochen; Biltzinger, Björn; Burgess, J. Michael
Since its launch in 2002, the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has detected many gamma-ray bursts (GRBs), which are summarised in the INTEGRAL Burst Alert System (IBAS) catalogue. This catalogue combines triggers from the data of the Imager on Board the INTEGRAL (IBIS) and of the anti-coincident shield (ACS) of …
Tracing obscured galaxy build-up at high redshift using deep radio surveys
Matute, Israel; Amarantidis, Stergios; Farrah, Duncan +5 more
Context. A fundamental question of extra-galactic astronomy that is yet to be fully understood, concerns the evolution of the star formation rate (SFR) and supermassive black hole (SMBH) activity with cosmic time, as well as their interplay and how it impacts galaxy evolution. A primary focus that could shed more light on these questions is the st…
Toward a 3D kinetic tomography of Taurus clouds. II. A new automated technique and its validation
Arenou, F.; Babusiaux, C.; Hottier, C. +4 more
Context. Three-dimensional (3D) kinetic maps of the Milky Way interstellar medium are an essential tool in studies of its structure and of star formation.
Aims: We aim to assign radial velocities to Galactic interstellar clouds now spatially localized based on starlight extinction and star distances from Gaia and stellar surveys.
Methods…
Structure of the accretion flow of IX Velorum as revealed by high-resolution spectroscopy
Pala, A. F.; Schmidtobreick, L.; Kára, J. +1 more
Context. Several high mass-transfer cataclysmic variables show evidence of outflow from the system, which could play an important role in their evolution. We investigate the system IX Vel, which was proposed to show similar characteristics.
Aims: We study the structure of the IX Vel system, particularly the structure of its accretion flow and…
Semi-analytic calculations for extended mid-infrared emission associated with FU Ori-type objects
Liu, Sheng-Yuan; Takami, Michihiro; Wang, Shiang-Yu +4 more
Aims: Near-infrared imaging polarimetry at high-angular resolutions has revealed an intriguing distribution of circumstellar dust toward FU Ori-type objects (FUors). These dust grains are probably associated with either an accretion disk or an infalling envelope. Follow-up observations in the mid-infrared would lead us to a better understandi…
EPIC 206197016: A very hot white dwarf orbited by a strongly irradiated red dwarf
Fossati, L.; Zejda, M.; Paunzen, E. +7 more
Context. Very precise satellite photometry has revealed a large number of variable stars whose variability is caused either by surface spots or by binarity. Detailed studies of such variables provide insights into the physics of these objects.
Aims: We study the nature of the periodic light variability of the white dwarf EPIC 206197016 that w…
Disentangling the nature of the prototype radio weak BL Lac. Contemporaneous multifrequency observations of WISE J141046.00+740511.2
Masetti, N.; Chavushyan, V.; Acosta-Pulido, J. A. +13 more
Context. The γ-ray emitting source WISE J141046.00+740511.2 has been associated with a Fermi-LAT detection by crossmatching with Swift/XRT data. It has shown all the canonical observational characteristics of a BL Lac source, including a power-law, featureless optical spectrum. However, it was only recently detected at radio frequencies and its ra…
Photospheric magnetic flux and coronal emission properties of small-scale bright and faint loops in the quiet Sun
Madjarska, Maria S.; Wiegelmann, Thomas; Galsgaard, Klaus
Context. The study explores the photospheric magnetic properties of bright and faint small-scale loop systems in the solar atmosphere of the quiet Sun, also known as X-ray or coronal bright points.
Aims: To understand how plasma confined in small-scale loops is heated to million degrees, the loop-associated photospheric and coronal magnetic f…
The source of unusual coronal upflows with photospheric abundance in a solar active region
Barczynski, K.; Peter, H.; Zhukov, A. N. +21 more
Context. Upflows in the corona are of importance, as they may contribute to the solar wind. There has been considerable interest in upflows from active regions (ARs). The coronal upflows that are seen at the edges of active regions have coronal elemental composition and can contribute to the slow solar wind. The sources of the upflows have been ch…
First detection of deuterated methylidyne (CD) in the interstellar medium
Wyrowski, Friedrich; Menten, Karl M.; Jacob, Arshia M. +1 more
While the abundance of elemental deuterium is relatively low (D/H ~ a few ×10−5), orders of magnitude higher D/H abundance ratios have been found for many interstellar molecules, enhanced by deuterium fractionation. In cold molecular clouds (T < 20 K), deuterium fractionation is driven by the H2D+ ion, whereas a…