Search Publications
A meeting at z ∼ 3: Young massive galaxies and an AGN within 30 kpc of the luminous QSO LBQS 0302-0019
Sander, A. A. C.; Shanks, T.; Husemann, B. +2 more
Context. Contrary to expectations from scenarios of black hole growth driven by galaxy interactions and mergers, dual active galactic nuclei (AGN) with kiloparsec separations are rarely observed and are very difficult to identify, in particular at high redshifts (i.e. z > 2).
Aims: Focussing on the recently discovered dual AGN system LBQS …
LIStEN: L' band Imaging Survey for Exoplanets in the North
Henning, Thomas; Ertel, Steve; Musso Barcucci, Arianna +9 more
Context. Planetary systems and debris discs are natural by-products of the star formation process, and they affect each other. The direct imaging technique allows simultaneous imaging of both a companion and the circumstellar disc it resides in, and is thus a valuable tool to study companion-disc interactions. However, the number of systems in whi…
Heavy-element Rydberg transition line emission from the post-giant-evolution star HD 101584
Lindqvist, M.; Olofsson, H.; Black, J. H. +7 more
Context. We report the detection of two lines at millimetre wavelengths towards the immediate surroundings of the post-giant and most likely post-common-envelope star HD 101584 using high-angular-resolution ALMA observations. The circumstellar environment of this object is rich in different molecular species, but we find no viable identifications …
Orbital eccentricities as indicators of stellar populations. A kinematical analysis of the local disc from Gaia DR2 catalogue
Cubarsi, R.; Stojanović, M.; Ninković, S.
Aims: Based on a local sample from Gaia DR2 catalogue composed of 74 339 stars, we are able to derive more accurate kinematic statistics defining the local stellar populations and classify the stars in terms of their planar and vertical orbital eccentricities.
Methods: Firstly, we carried out a kinematical characterisation of stellar pop…
Magnetic flux structuring of the quiet Sun internetwork. Center-to-limb analysis of solar-cycle variations
Faurobert, M.; Ricort, G.
Context. The small-scale magnetism of the quiet Sun has been investigated by various means in recent decades. It is now well established that the quiet Sun contains in total more magnetic flux than active regions and represents an important reservoir of magnetic energy. But the nature and evolution of these fields remain largely unknown.
Aims…
Systematic search for lensed X-ray sources in the CLASH fields
Nonino, Mario; Grillo, Claudio; Rosati, Piero +8 more
Aims: We exploit the high angular resolution of Chandra to search for unresolved X-ray emission from lensed sources in the field of view of 11 CLASH clusters, whose critical lines and amplification maps were previously obtained with accurate strong-lensing models. We consider a solid angle in the lens plane corresponding to a magnification &m…
Properties of the brightest globular cluster in M 81 based on multicolour observations
Ma, Jun; Wang, Shoucheng
Context. Researching the properties of the brightest globular cluster (referred to as GC1) in M 81 can provide a fossil record of the earliest stages of galaxy formation and evolution. The Beijing-Arizona-Taiwan-Connecticut (BATC) Multicolour Sky Survey has carried out deep exposures of M 81.
Aims: We derive the magnitudes in intermediate-ban…
Nonsequential neural network for simultaneous, consistent classification, and photometric redshifts of OTELO galaxies
Cepa, J.; Pérez García, A. M.; Alfaro, E. J. +17 more
Context. Computational techniques are essential for mining large databases produced in modern surveys with value-added products.
Aims: This paper presents a machine learning procedure to carry out a galaxy morphological classification and photometric redshift estimates simultaneously. Currently, only a spectral energy distribution (SED) fitti…
Evidence for local particle acceleration in the first recurrent galactic cosmic ray depression observed by Solar Orbiter. The ion event on 19 June 2020
Fedorov, A.; Kulkarni, S. R.; Lario, D. +61 more
Context. In mid-June 2020, the Solar Orbiter (SolO) mission reached its first perihelion at 0.51 au and started its cruise phase, with most of the in situ instruments operating continuously.
Aims: We present the in situ particle measurements of the first proton event observed after the first perihelion obtained by the Energetic Particle Detec…
Orbital and sub-orbital period determination of the candidate high-mass X-ray binary HD 3191
Luque-Escamilla, Pedro L.; Martí, Josep; Paredes, Josep M. +1 more
Aims: The final aim of this paper is to expand the sparse group of X-ray binaries with gamma-ray counterparts as laboratories to study high-energy processes under physical conditions that periodically repeat.
Methods: A follow-up of a candidate system has been carried out. We applied both photometric and spectroscopic techniques in the o…