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Mapping the "invisible" circumgalactic medium around a z ∼ 4.5 radio galaxy with MUSE
Lehnert, Matthew D.; De Breuck, Carlos; Wylezalek, Dominika +5 more
In this paper we present Multi Unit Spectroscopic Explorer integral field unit spectroscopic observations of the ∼70 × 30 kpc2 Lyα halo around the radio galaxy
Investigating point sources in MWC 758 with SPHERE
Ménard, F.; Pantin, E.; Ginski, C. +26 more
Context. Spiral arms in protoplanetary disks could be shown to be the manifestation of density waves launched by protoplanets and propagating in the gaseous component of the disk. At least two point sources have been identified in the L band in the MWC 758 system as planetary mass object candidates.
Aims: We used VLT/SPHERE to search for coun…
Hard X-ray selected giant radio galaxies - III. The LOFAR view
Venturi, T.; Dallacasa, D.; Ubertini, P. +12 more
Giant radio galaxies (GRGs), with extended structures reaching hundreds of kpc, are among the most spectacular examples of ejection of relativistic plasma from supermassive black holes. In this work, third of a series, we present Low-Frequency Array (LOFAR) images at 144 MHz, collected in the framework of the LOFAR Two-metre Sky Survey Data Releas…
Simulating the Coronal Evolution of Bipolar Active Regions to Investigate the Formation of Flux Ropes
Green, L. M.; Yardley, S. L.; Mackay, D. H.
The coronal magnetic field evolution of 20 bipolar active regions (ARs) is simulated from their emergence to decay using the time-dependent nonlinear force-free field method of Mackay, Green, and van Ballegooijen (Astrophys. J. 729, 97, 2011). A time sequence of cleaned photospheric line-of-sight magnetograms, which covers the entire evolution of …
Two-component Magnetic Field along the Line of Sight to the Perseus Molecular Cloud: Contribution of the Foreground Taurus Molecular Cloud
Bastien, Pierre; Coudé, Simon; Hasegawa, Tetsuo +13 more
Optical stellar polarimetry in the Perseus molecular cloud direction is known to show a fully mixed bimodal distribution of position angles across the cloud. We study the Gaia trigonometric distances to each of these stars and reveal that the two components in position angles trace two different dust clouds along the line of sight. One component, …
Revisiting the Kepler field with TESS: Improved ephemerides using TESS 2 min data
Armstrong, David J.; Kunimoto, Michelle; Pollacco, Don +1 more
Up to date planet ephemerides are becoming increasingly important as exoplanet science moves from detecting exoplanets to characterizing their architectures and atmospheres in depth. In this work, ephemerides are updated for 22 Kepler planets and 4 Kepler planet candidates, constituting all Kepler planets and candidates with sufficient signal to n…
Baryon acoustic oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys
Myers, Adam D.; Moustakas, John; Eisenstein, Daniel J. +19 more
We search for the baryon acoustic oscillations in the projected cross-correlation function binned into transverse comoving radius between the SDSS-IV DR16 eBOSS quasars and a dense photometric sample of galaxies selected from the DESI Legacy Imaging Surveys. We estimate the density of the photometric sample of galaxies in this redshift range to be…
The BepiColombo solar conjunction experiments revisited
Cappuccio, Paolo; di Stefano, Ivan; Iess, Luciano
BepiColombo ESA/JAXA mission is currently in its 7 year cruise phase towards Mercury. The Mercury orbiter radioscience experiment (MORE), one of the 16 experiments of the mission, will start its scientific investigation during the superior solar conjunction (SSC) in March 2021 with a test of general relativity (GR). Other solar conjunctions will f…
Towards a better understanding of supernova environments: a study of SNe 2004dg and 2012P in NGC 5806 with HST and MUSE
Sun, Ning-Chen; Crowther, Paul A.; Zapartas, Emmanouil +2 more
Core-collapse supernovae (SNe) are the inevitable fate of most massive stars. Since most stars form in groups, SN progenitors can be constrained with information of their environments. It remains challenging to accurately analyse the various components in the environment and to correctly identify their relationships with the SN progenitors. Using …
Brown dwarfs as ideal candidates for detecting UV aurora outside the Solar System: Hubble Space Telescope observations of 2MASS J1237+6526
Saur, Joachim; Youngblood, Allison; Roth, Lorenz +5 more
Context. Observations of auroral emissions are powerful means to remotely sense the space plasma environment around planetary bodies and ultracool dwarfs. Therefore successful searches and characterization of aurorae outside the Solar System will open new avenues in the area of extrasolar space physics.
Aims: We aim to demonstrate that brown …