Search Publications
Energy estimation of small-scale jets from the quiet-Sun region
Li, Dong; Ning, Zongjun; Shi, Fanpeng +3 more
Context. Solar jets play a role in coronal heating and the supply of solar wind.
Aims: In this study, we calculate the energies of 23 small-scale jets emerging from a quiet-Sun region in order to investigate their contributions to coronal heating.
Methods: We used data from the High-Resolution Imager (HRI) of the Extreme Ultraviolet Imag…
An analysis of spectroscopic, seismological, astrometric, and photometric masses of pulsating white dwarf stars
Kepler, S. O.; Córsico, Alejandro H.; Uzundag, Murat +3 more
Context. A central challenge in the field of stellar astrophysics lies in accurately determining the mass of stars, particularly when dealing with isolated ones. However, for pulsating white dwarf stars, the task becomes more tractable due to the availability of multiple approaches such as spectroscopy, asteroseismology, astrometry, and photometry…
The distribution of the near-solar bound dust grains detected with Parker Solar Probe
Mann, I.; Kočiščák, S.; Theodorsen, A.
Context. Parker Solar Probe (PSP) counts dust impacts in the near-solar region, but modeling effort is needed to understand the dust population's properties. Aims. We aim to constrain the dust cloud's properties based on the flux observed by PSP. Methods. We developed a forward model for the bound dust detection rates using the formalism of 6D pha…
Cataclysmic variables and the disc instability model in the Gaia DR3 colour-magnitude diagram
Babusiaux, Carine; Dubus, Guillaume
Context. Cataclysmic variables (CVs) are semi-detached binaries composed of a white dwarf orbiting a lower-mass K or M star.
Aims: We investigate whether CVs are responsible for a new intriguing feature (the "hook") that appears in the Gaia DR3 colour-magnitude Hertzsprung-Russell diagram (HRD) when selecting sources with low extinction. We a…
Three-part structure of a solar coronal mass ejection observed in low coronal signatures of Solar Orbiter
Veronig, Astrid M.; Dumbović, Mateja; Dissauer, Karin +4 more
Context. Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field from the Sun propagating through the heliosphere. Observations of the March 28, 2022, event provide unique images of a three-part solar CME in the low corona in active region 12975: a bright core or filament, a dark cavity, and a bright front edge. Aims. …
High-energy insights from an escaping coronal mass ejection with Solar Orbiter/STIX observations
Hayes, L. A.; Krucker, S.; Collier, H. +1 more
Context. Solar eruptive events, including solar flares and coronal mass ejections (CMEs), are typically characterised by energetically significant X-ray emissions from flare-accelerated electrons and hot thermal plasmas. However, the intense brightness of solar flares often overshadows high-coronal X-ray emissions from the associated eruptions due…
Molecular cloud matching in CO and dust in M33: II. Physical properties of giant molecular clouds
Kobayashi, Masato I. N.; Bigiel, Frank; Ossenkopf-Okada, Volker +8 more
Understanding the physical properties such as mass, size, and surface mass density of giant molecular clouds or associations (GMCs/GMAs) in galaxies is crucial for gaining deeper insights into the molecular cloud and star formation (SF) processes. We determine these quantities for the Local Group flocculent spiral galaxy M33 using Herschel dust an…
STONKS: Quasi-real time XMM-Newton transient detection system
Georgantopoulos, I.; Schwope, A.; Webb, N. A. +6 more
Context. Over recent decades, astronomy has entered the era of massive data and real-time surveys. This is improving the study of transient objects - although they still contain some of the most poorly understood phenomena in astrophysics, as it is inherently more difficult to obtain data to constrain the proposed models.
Aims: In order to he…
Euclid: The rb‑M* relation as a function of redshift: I. The 5 × 109 M⊙ black hole in NGC 1272
Cimatti, A.; Baccigalupi, C.; Burigana, C. +148 more
Core ellipticals, which are massive early-type galaxies with almost constant inner surface brightness profiles, are the result of dry mergers. During these events, a binary black hole (BBH) is formed, destroying the original cuspy central regions of the merging objects and scattering stars that are not on tangential orbits. The size of the emergin…
Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b
Trifonov, Trifon; Henning, Thomas; Hellier, Coel +68 more
Context. Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters. This challenges our understanding of their actual origin. Aims. We report the results of our warm Jupiters survey, which was carried out with the CHIRON spectrograph within the KE…