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Hot subdwarfs in close binaries observed from space. II. Analyses of the light variations
Geier, S.; Pelisoli, I.; Schaffenroth, V. +2 more
Context. Hot subdwarfs in close binaries with either M dwarf, brown dwarf, or white dwarf companions show unique light variations. In hot subdwarf binaries with M dwarf or brown dwarf companions, we can observe the so-called reflection effect, while in hot subdwarfs with close white dwarf companions, we find ellipsoidal modulation and/or Doppler b…
Black hole and galaxy co-evolution in radio-loud active galactic nuclei at z ∼ 0.3-4
Castignani, G.; Combes, F.; Poitevineau, R.
The relation between the mass of the supermassive black hole (SMBH) in the center of galaxies and their bulge mass or central velocity dispersion is well known. This suggests a coevolution between the SMBHs and their galaxy hosts. Our aim is to study this relation, specifically, for radio loud galaxies, and as a function of redshift z. We selected…
3D physico-chemical model of a pre-stellar core. I. Environmental and structural impact on the distribution of CH3OH and c-C3H2
Caselli, P.; Jensen, S. S.; Spezzano, S. +2 more
Context. Pre-stellar cores represent the earliest stage of the formation process of stars and planets. By characterizing the physical and chemical structure of these cores, we can establish the initial conditions for star and planet formation and determine to what degree the chemical composition of pre-stellar cores is inherited by the later stage…
The SOUL view of IRAS 20126+4104. Kinematics and variability of the H2 jet from a massive protostar
Sanna, A.; Leurini, S.; Esposito, S. +20 more
Context. We exploit the increased sensitivity of the recently installed adaptive optics SOUL at the LBT to obtain new high-spatial-resolution near-infrared images of the massive young stellar object IRAS20126+4104 and its outflow.
Aims: We aim to derive the jet proper motions and kinematics, as well as to study its photometric variability by …
Imaging-spectroscopy of a band-split type II solar radio burst with the Murchison Widefield Array
Gallagher, Peter T.; Carley, Eoin P.; Oberoi, Divya +1 more
Type II solar radio bursts are caused by magnetohydrodynamic (MHD) shocks driven by solar eruptive events such as coronal mass ejections (CMEs). Often, both fundamental and harmonic bands of type II bursts are split into sub-bands, which are generally believed to be coming from upstream and downstream regions of the shock; however, this explanatio…
Spatial and dynamical structure of the NGC 2264 star-forming region
Micela, G.; Bonito, R.; Peres, G. +7 more
Context. The formation of stars within molecular clouds and the early stages of stellar evolution (e.g., mass accretion and disk dispersal) are all active research topics. The target of this study, NGC 2264, is a benchmark star-forming region in which these issues can be profitably studied.
Aims: We revisit the structure, dynamics, and star-f…
Relativistic electron beams accelerated by an interplanetary shock
Lario, D.; Jebaraj, I. C.; Vainio, R. +16 more
Context. Collisionless shock waves have long been considered to be among the most prolific particle accelerators in the universe. Shocks alter the plasma they propagate through, and often exhibit complex evolution across multiple scales. Interplanetary (IP) traveling shocks have been recorded in situ for over half a century and act as a natural la…
The ALMA-ALPINE [CII] survey: Kennicutt-Schmidt relation in four massive main-sequence galaxies at z ∼ 4.5
Pozzi, F.; Béthermin, M.; Magdis, G. E. +40 more
Aims: The Kennicutt-Schmidt (KS) relation between the gas and the star formation rate (SFR) surface density (Σgas − ΣSFR) is essential to understand star formation processes in galaxies. To date, it has been measured up to z ∼ 2.5 in main-sequence galaxies. In this Letter our aim is to put constraints at z ∼ 4.5 using a …
High-resolution X-ray spectra of RS Ophiuchi (2006 and 2021): Revealing the cause of SSS variability
Ness, J. -U.; Munari, U.; Orio, M. +9 more
Context. The ~ 10-20 yr recurrent symbiotic nova RS Oph exploded on 2021 August 9, the seventh confirmed recorded outburst since 1898. During the previous outburst in 2006, the current fleet of X-ray space observatories was already in operation, and thanks to the longevity of Swift, XMM-Newton, and Chandra, a direct comparison between these two ou…
Euclid preparation. XXX. Performance assessment of the NISP red grism through spectroscopic simulations for the wide and deep surveys
Aussel, H.; Rodighiero, G.; Palazzi, E. +235 more
This work focusses on the pilot run of a simulation campaign aimed at investigating the spectroscopic capabilities of the Euclid Near-Infrared Spectrometer and Photometer (NISP), in terms of continuum and emission line detection in the context of galaxy evolutionary studies. To this purpose, we constructed, emulated, and analysed the spectra of 49…