Search Publications
Development of a cometosheath at comet 67P/Churyumov-Gerasimenko. A case study comparison of Rosetta observations
Nilsson, H.; Goetz, C.; Stenberg Wieser, G. +2 more
Context. The ionosphere of a comet is known to deflect the solar wind through mass loading, but the interaction is dependent on cometary activity. We investigate the details of this process at comet 67P using the Rosetta Ion Composition Analyzer.
Aims: This study aims to compare the interaction of the solar wind and cometary ions during two d…
Close binary evolution based on Gaia DR2. The origin of late WC-type Wolf-Rayet stars with low luminosity
Meynet, Georges; Qin, Ying; Ekström, Sylvia +8 more
Context. The observed late-type WC Wolf-Rayet stars (WC7-9) with low luminosity below log L/L⊙ < 5.4 in the HR diagram cannot be reproduced satisfactorily by the evolutionary track of single stars. The mass transfer due to Roche lobe overflow drastically modifies the internal structure and surface compositions of two components. Ther…
Overexpansion-dominated coronal mass ejection formation and induced radio bursts
Song, H. Q.; Cheng, X.; Ding, M. D. +1 more
Aims: Coronal mass ejections (CMEs) are the most fascinating explosions in the Solar System. Their formation is still not fully understood, however.
Methods: We investigated a well-observed CME on 2021 May 7 that showed a typical three-component structure and was continuously observed from 0 to 3 R⊙ by a combination of SDO/AIA…
VVVX Near-IR Photometry for 99 Low-mass Stars in the Gaia EDR3 Catalog of Nearby Stars
Minniti, D.; Solano, E.; Saito, R. K. +3 more
Context. Red dwarf stars, which represent 75% of stars in the Milky Way, can be studied in great detail in the solar neighborhood, where the sample is more complete.
Aims: We intend to better characterize red-dwarf candidates selected from the Gαìα Catalog of Nearby Stars using optical and near-infrared multi-filter photometry from the Vista …
The spatial evolution of young massive clusters. III. Effect of the Gaia filter on 2D spatial distribution studies
Buckner, Anne S. M.; Khorrami, Zeinab; González, Marta +3 more
Context. With the third release of the high-precision optical-wavelength Gaia survey, we are in a better position than ever before to study young clusters. However, Gaia is limited in the optical down to G ∼ 21 mag, and therefore it is essential to understand the biases introduced by a magnitude-limited sample on spatial distribution studies.
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A rare phosphorus-rich star in an eclipsing binary from TESS
Kama, Mihkel; Folsom, Colin P.; Eenmäe, Tõnis +6 more
Context. Few exoplanets around hot stars with radiative envelopes have been discovered, although new observations from the TESS mission are improving this. Stars with radiative envelopes have little mixing at their surface, and thus their surface abundances provide a sensitive test case for a variety of processes, including potentially star-planet…
Comparison of hydrostatic and lensing cluster mass estimates: A pilot study in MACS J0647.7+7015
Macías-Pérez, J. F.; Perotto, L.; Pointecouteau, E. +6 more
The detailed characterization of scaling laws relating the observables of a cluster of galaxies to their mass is crucial for obtaining accurate cosmological constraints with clusters. In this paper, we present a comparison between the hydrostatic and lensing mass profiles of the cluster MACS J0647.7+7015 at z = 0.59. The hydrostatic mass profile i…
On the trail of a comet's tail: A particle tracking algorithm for comet 67P/Churyumov-Gerasimenko
Agarwal, Jessica; Pfeifer, Marius; Schröter, Matthias
Context. During the post-perihelion phase of the European Space Agency's Rosetta mission to comet
TUVOpipe: A pipeline to search for UV transients with Swift-UVOT
Wijnands, Rudy; Modiano, David; Parikh, Aastha +3 more
Despite the prevalence of transient-searching facilities operating across most wavelengths, the ultraviolet (UV) transient sky remains to be systematically studied. Therefore, we recently initiated the Transient Ultraviolet Objects (TUVO) project, with which we search for serendipitous UV transients in data obtained using currently available UV in…
SPHERE adaptive optics performance for faint targets
Jones, M. I.; Milli, J.; Blanchard, I. +4 more
Context. High-contrast imaging is a powerful technique for detecting and characterizing planetary companions at orbital separations ≳100 mas from their parent stars.
Aims: We aim to study the limiting magnitude of the VLT/SPHERE adaptive optics (AO) system and the corresponding instrument performance for faint targets (G ≥ 11.0 mag).
Met…