Search Publications
Influence of Processes on the Sun and in the Interplanetary Medium on the Solar Proton Event on March 30, 2022
Vlasova, N. A.; Bazilevskaya, G. A.; Ginzburg, E. A. +5 more
The article presents the results of a comparative analysis of the solar proton event on March 30, 2022, which has an unusual time profile of solar proton fluxes, and the previous and subsequent solar proton events (March 28, 2022, and April 02, 2022). Increases in energetic proton fluxes in the interplanetary and near-Earth space are associated wi…
Supervised machine learning on Galactic filaments: II. Encoding the position to optimize the detection of filaments over a wide range of column density and contrast
Arzoumanian, D.; Zavagno, A.; Schisano, E. +5 more
Context. Filaments host star formation and are fundamental structures of galaxies. Their diversity, as observed in the interstellar medium, from very low-density structures to very dense hubs, and their complex life cycles make their complete detection challenging over this large diversity range. Aims. Using 2D H2 column density images …
Detecting New Visual Binaries in Gaia DR3 with Gaia and Two Micron All Sky Survey (2MASS) Photometry. II. Speckle Observations of 16 Low-separation Systems
Stassun, Keivan G.; Lépine, Sébastien; Medan, Ilija +1 more
Here we present speckle observations of 16 low-separation (s < 30 au) high-probability candidate binaries from the catalog by Medan et al., where secondaries typically lack astrometric solutions in Gaia. From these speckle observations, we find a second component is always detected within the field of view. To determine if the detection is cons…
A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey
Zhang, Yapeng; Pattle, Kate; Karoly, Janik +152 more
As part of the B-fields In Star-forming Region Observations survey, we present James Clerk Maxwell Telescope (JCMT) 850 µm polarimetric observations toward the Orion integral-shaped filament (ISF) that covers three portions known as OMC-1, OMC-2, and OMC-3. The magnetic field threading the ISF seen in the JCMT POL-2 map appears as a tale of …
Central molecular zones in galaxies: 13CO(6–5) and molecular gas conditions in bright nearby galaxies
Güsten, R.; Israel, F. P.; Lundgren, A.
This paper summarizes all presently available Jupp ≥ 5 13CO and accompanying 12CO measurements of galaxy centers including new J = 6–5 13CO and 12CO observations of eleven galaxies with the Atacama Pathfinder EXperiment (APEX) telescope and also Herschel high-J measurements of both species in …
Lack of emission lines in the optical spectra of SAX J1808.4–3658 during reflaring of the 2019 outburst
D'Avanzo, P.; Campana, S.; Russell, D. M. +5 more
Aims. We present spectroscopy of the accreting X-ray binary and millisecond pulsar SAX J1808.4–3658. These observations are the first to be obtained during a reflaring phase. We collected spectroscopic data during the beginning of the reflaring of the 2019 outburst and compared them to previous datasets taken at different epochs, both of the same …
The role of stellar mass in the cosmic history of star formation as seen by Herschel and ALMA
Magnelli, B.; Daddi, E.; Elbaz, D. +4 more
Aims. We explore the contribution of galaxies, as a function of their stellar mass, to the cosmic star formation history (CSFH). In order to avoid uncertain extrapolations of the infrared luminosity function, which is often polluted by the contribution of starbursts, we base our analysis on stellar mass. Attenuation by dust is accounted for thanks…
All-sky Guide Star Catalog for CSST
Tian, Hao; Wang, Wei; Zhang, Xin +17 more
The China Space Station Telescope (CSST) is a two-meter space telescope with multiple back-end instruments. The Fine Guidance Sensor (FGS) is an essential subsystem of the CSST Precision Image Stability System to ensure the required absolute pointing accuracy and line-of-sight stabilization. In this study, we construct the Main Guide Star Catalog …
The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT - II. Nine new radio timing solutions and glitches from young pulsars
Liu, Y.; Haberl, F.; Venter, C. +17 more
We report new radio timing solutions from a 3-yr observing campaign conducted with the MeerKAT and Murriyang telescopes for nine Small Magellanic Cloud pulsars, increasing the number of characterized rotation-powered extragalactic pulsars by 40 per cent. We can infer from our determined parameters that the pulsars are seemingly all isolated, that …
Cometary ion drift energy and temperature at comet 67P/Churyumov-Gerasimeko
Nilsson, Hans; Stenberg Wieser, Gabriella; Moeslinger, Anja +4 more
The Ion Composition Analyzer (ICA) on the Rosetta spacecraft observed both the solar wind and the cometary ionosphere around comet 67P/Churyumov-Gerasimenko for nearly two years. However, observations of low energy cometary ions were affected by a highly negative spacecraft potential, and the ICA ion density estimates were often much lower than pl…