Search Publications
The eROSITA Final Equatorial-Depth Survey (eFEDS). Presenting the demographics of X-ray emission from normal galaxies
Haberl, F.; Hornschemeier, A. E.; Ptak, A. +17 more
Context. The eROSITA Final Equatorial Depth Survey (eFEDS), completed in survey mode during the calibration and performance verification phase of the eROSITA instrument on Spectrum Roentgen Gamma, delivers data at and beyond the final depth of the 4-yr eROSITA all-sky survey (eRASS:8), f0.5-2 keV = 1.1 × 10−14 erg s−1
Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars
Bieryla, Allyson; Latham, David W.; Brahm, Rafael +45 more
Context. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties. However, such targets are still poorly explored in radial velocity (RV) surveys because they only feature a small number of stellar lines and those are us…
Evidence of a complex structure within the 2013 August 19 coronal mass ejection. Radial and longitudinal evolution in the inner heliosphere
Jian, L. K.; Rodríguez-Pacheco, J.; Zouganelis, I. +9 more
Context. Late on 2013 August 19, a coronal mass ejection (CME) erupted from an active region located near the far-side central meridian from Earth's perspective. The event and its accompanying shock were remotely observed by the STEREO-A, STEREO-B, and SOHO spacecraft. The interplanetary counterpart (ICME) was intercepted by MESSENGER near 0.3 au …
From ridges to manifolds: 3D characterization of the moving groups in the Milky Way disc
Antoja, T.; Bernet, M.; Monari, G. +4 more
Context. The details of the effect of the bar and spiral arms on the disc dynamics of the Milky Way are still unknown. The stellar velocity distribution in the solar neighbourhood displays kinematic substructures, which are possibly signatures of these processes and of previous accretion events. With the Gaia mission, more details of these signatu…
Quasars with large proper motions: A selection from the LQAC-5 catalogue combined with Gaia EDR3. Focusing on astrometric and photometric properties
Zacharias, N.; Barache, C.; Lambert, S. +5 more
Context. Thanks to the cross-identification between the Gaia EDR3 (E-Data Release 3) catalogue and the quasars' compiled catalogue LQAC-5 (Large Quasar Astrometric Catalogue-5), accurate astrometric parameters as well as photometric measurements were available for a set of 416 113 quasars.
Aims: After analysing the astrometric and photometric…
New strong lensing modelling of SDSS J2222+2745 enhanced with VLT/MUSE spectroscopy
Brammer, G.; Grillo, C.; Tozzi, P. +8 more
Context. SDSS J2222+2745, at z = 0.489, is one of the few currently known lens clusters with multiple images (six) of a background (z = 2.801) quasar with measured time delays between two image pairs (with a sub-percent relative error for the longer time delay). Systems of this kind can be exploited as alternative cosmological probes through high-…
J1721+8842: a gravitationally lensed binary quasar with a proximate damped Lyman-α absorber
Courbin, F.; Sluse, D.; Lemon, C. +5 more
High-redshift binary quasars provide key insights into mergers and quasar activity, and are useful tools for probing the spatial kinematics and chemistry of galaxies along the line of sight. However, only three sub-10-kpc binaries have been confirmed above z = 1. Gravitational lensing would provide a way to easily resolve such binaries, study them…
Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
Massa, D.; Hamann, W. -R.; Postnov, K. A. +10 more
M33 X-7 is the only known eclipsing black hole high mass X-ray binary. The system is reported to contain a very massive O supergiant donor and a massive black hole in a short orbit. The high X-ray luminosity and its location in the metal-poor galaxy M33 make it a unique laboratory for studying the winds of metal-poor donor stars with black hole co…
Weak evidence for variable occultation depth of 55 Cnc e with TESS
Demory, B. -O.; Morris, B. M.; Schanche, N. +2 more
Context. 55 Cnc e is in a 0.73 day orbit transiting a Sun-like star. It has been observed that the occultation depth of this super-Earth, with a mass of 8 M⊕ and radius of 2 R⊕, changes significantly over time at mid-infrared wavelengths. Observations with Spitzer measured a change in its day-side brightness temperature of 12…
Generic profile of a long-lived corotating interaction region and associated recurrent Forbush decrease
Temmer, M.; Vršnak, B.; Dumbović, M. +2 more
Context. Corotating interaction regions (CIRs), formed by the interaction of slow solar wind and fast streams that originate from coronal holes (CHs), produce recurrent Forbush decreases, which are short-term depressions in the galactic cosmic ray (GCR) flux.
Aims: Our aim is to prepare a reliable set of CIR measurements to be used as a textb…