Search Publications
Phase-resolved X-ray spectroscopy of PSR B0656+14 with SRG/eROSITA and XMM-Newton
Maitra, Chandreyee; Haberl, Frank; Potekhin, Alexander Y. +13 more
We present a detailed spectroscopic and timing analysis of X-ray observations of the bright pulsar PSR B0656+14. The observations were obtained simultaneously with eROSITA and XMM-Newton during the calibration and performance verification phase of the Spektrum-Roentgen-Gamma mission (SRG). The analysis of the 100 ks deep observation of eROSITA is …
Water, hydrogen cyanide, carbon monoxide, and dust production from distant comet 29P/Schwassmann-Wachmann 1
Küppers, M.; Hartogh, P.; Lellouch, E. +13 more
Context. 29P/Schwassmann-Wachmann 1 is a distant Centaur/comet, showing persistent CO-driven activity and frequent outbursts.
Aims: We aim to better characterize its gas and dust activity from multiwavelength observations performed during outbursting and quiescent states.
Methods: We used the HIFI, PACS and SPIRE instruments of the Hersc…
Ariel stellar characterisation. I. Homogeneous stellar parameters of 187 FGK planet host stars: Description and validation of the method
Rainer, M.; Bossini, D.; Sanna, N. +16 more
Context. In 2020 the European Space Agency selected Ariel as the next mission to join the space fleet of observatories to study planets outside our Solar System. Ariel will be devoted to the characterisation of 1000 planetary atmospheres in order to understand what exoplanets are made of, how they form, and how they evolve. To achieve the last two…
A search for ionised gas outflows in an Hα imaging atlas of nearby LINERs
Hermosa Muñoz, L.; Márquez, I.; Masegosa, J. +2 more
Context. Outflows play a major role in the evolution of galaxies. However, we do not yet have a complete picture of their properties (extension, geometry, orientation, and clumpiness). For low-luminosity active galactic nuclei (AGNs), in particular low-ionisation nuclear emission line regions (LINERs), the rate of outflows and their properties are…
Properties of globular clusters formed in dark matter mini-halos
Vitral, Eduardo; Boldrini, Pierre
We seek to differentiate dynamical and morphological attributes between globular clusters (GCs) that were formed inside their own dark matter (DM) mini-halo from those who were not. We employed high-resolution full N-body simulations on a Graphics Processing Unit (GPU) of the GCs with and without a DM mini-halo, orbiting a Fornax-like dwarf galaxy…
Analysis of the arm-like structure in the outer disk of PDS 70. Spiral density wave or vortex?
Absil, O.; Christiaens, V.; Juillard, S.
Context. Observing dynamical interactions between planets and disks is key to understanding their formation and evolution. Two protoplanets have recently been discovered within the PDS 70 protoplanetary disk, along with an arm-like structure toward the northwest of the star.
Aims: Our aim is to constrain the morphology and origin of this arm-…
Constraining the multi-scale dark-matter distribution in CASSOWARY 31 with strong gravitational lensing and stellar dynamics
Grillo, C.; Wang, H.; Christensen, L. +6 more
We study the inner structure of the group-scale lens CASSOWARY 31 (CSWA 31) by adopting both strong lensing and dynamical modeling. CSWA 31 is a peculiar lens system. The brightest group galaxy (BGG) is an ultra-massive elliptical galaxy at z = 0.683 with a weighted mean velocity dispersion of σ = 432 ± 31 km s−1. It is surrounded by gr…
The Great Flare of 2021 November 19 on AD Leonis. Simultaneous XMM-Newton and TESS observations
Stelzer, B.; Caramazza, M.; Raetz, S. +2 more
We present a detailed analysis of a superflare on the active M dwarf star AD Leonis. The event presents a rare case of a stellar flare that was simultaneously observed in X-rays (with XMM-Newton) and in the optical (with the Transiting Exoplanet Survey Satellite, TESS). The radiated energy in the 0.2 − 12 keV X-ray band (1.26 ± 0.01 × 1033
Water content trends in K2-138 and other low-mass multi-planetary systems
Deleuil, M.; Morel, T.; Mousis, O. +5 more
Context. Both rocky super-Earths and volatile-rich sub-Neptunes have been found simultaneously in multi-planetary systems, suggesting that these systems are appropriate to study different composition and formation pathways within the same environment.
Aims: We perform a homogeneous interior structure analysis of five multi-planetary systems t…
Three new high-mass X-ray binaries in the Large Magellanic Cloud
Haberl, F.; Udalski, A.; Vasilopoulos, G. +4 more
Context. The Magellanic Clouds host a large population of high-mass X-ray binary (HMXB) systems, and although the Large Magellanic Cloud (LMC) is an order of magnitude more massive than the Small Magellanic Cloud, there are significantly fewer known HMXBs in the former.
Aims: We conducted a search for new HMXBs in XMM-Newton observations that…