Search Publications
The eROSITA extragalactic CalPV serendipitous catalog
Maitra, Chandreyee; Nandra, Kirpal; Reiprich, Thomas H. +22 more
Context. The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory performed calibration and performance verification (CalPV) observations between September 2019 and December 2019, ahead of the planned 4-yr all-sky surveys. Most of them were deep, pointing-mode observations.
Aims: We present here the X-ray catalog det…
Unveiling the formation of NGC 2915 with MUSE: A counter-rotating stellar disk embedded in a disordered gaseous environment
Lin, Zesen; Chen, Guangwen; Kong, Xu +6 more
NGC 2915 is a unique nearby galaxy that is classified as an isolated blue compact dwarf based on its optical appearance but has an extremely extended H I gas disk with prominent Sd-type spiral arms. To unveil the starburst-triggering mystery of NGC 2915, we performed a comprehensive analysis of deep VLT/MUSE integral field spectroscopic observatio…
Constraining leptonic emission scenarios for the PeVatron candidate HESS J1702−420 with deep XMM-Newton observations
Khélifi, B.; Lemière, A.; Terrier, R. +3 more
Aims: We aim to search for a hidden leptonic accelerator, such as a high-Ė pulsar, associated with the unidentified TeV object HESS J1702−420A.
Methods: We carried out a 72 ks X-ray observation with the XMM-Newton satellite and analyzed the resulting data jointly with the publicly available HESS spectral energy distribution (SED) results…
The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager (Corrigendum)
Vial, J. -C.; Zhang, X.; Peter, H. +146 more
ULISSE: A tool for one-shot sky exploration and its application for detection of active galactic nuclei
Paolillo, Maurizio; Brescia, Massimo; Cavuoti, Stefano +5 more
Context. Modern sky surveys are producing ever larger amounts of observational data, which makes the application of classical approaches for the classification and analysis of objects challenging and time consuming. However, this issue may be significantly mitigated by the application of automatic machine and deep learning methods.
Aims: We p…
CORALIE radial-velocity search for companions around evolved stars (CASCADES). III. A new Jupiter host-star: in-depth analysis of HD 29399 using TESS data
Buldgen, G.; Eggenberger, P.; Ségransan, D. +11 more
Context. Increasing the number of detected exoplanets is far from anecdotal, especially for long-period planets that require a long duration of observation. More detections imply a better understanding of the statistical properties of exoplanet populations, and detailed modelling of their host stars also enables thorough discussions of star-planet…
Post-Newtonian gravity and Gaia-like astrometry. Effect of PPN γ uncertainty on parallaxes
Bucciarelli, Beatrice; Lattanzi, Mario G.; Crosta, Mariateresa +3 more
Context. Relativistic models of light propagation adopted for high-precision astrometry are based on the parametrised post-Newtonian formalism, which provides a framework for examining the effects of a hypothetical violation of general relativity on astrometric data. Astrometric observations are strongly affected by the post-Newtonian (PPN) parame…
Three-dimensional analyses of an aspherical coronal mass ejection and its driven shock
Feng, Li; Lu, Lei; Gan, Weiqun +4 more
Context. Observations reveal that shocks can be driven by fast coronal mass ejections (CMEs) and play essential roles in particle accelerations. A critical ratio, δ, derived from a shock standoff distance normalized by the radius of curvature (ROC) of a CME, allows us to estimate shock and ambient coronal parameters. However, true ROCs of CMEs are…
A probabilistic method for detecting solar-like oscillations using meaningful prior information. Application to TESS 2-minute photometry
Chaplin, W. J.; Davies, G. R.; Nielsen, M. B. +2 more
Context. Current and future space-based observatories such as the Transiting Exoplanet Survey Satellite (TESS) and PLATO are set to provide an enormous amount of new data on oscillating stars, and in particular stars that oscillate similar to the Sun. Solar-like oscillators constitute the majority of known oscillating stars and so automated analys…
The mid-infrared aliphatic bands associated with complex hydrocarbons
Peeters, E.; Sloan, G. C.; Stock, D. J. +2 more
Context. The mid-infrared emission features commonly attributed to polycyclic aromatic hydrocarbons (PAHs) vary in profile and peak position. These profile variations form the basis of their classification: Classes A, B, C reflect profiles with increasing central wavelength while Class D has similar central wavelength as Class B but a similar broa…