Search Publications
The data center for the Spectrometer and Telescope for Imaging X-rays (STIX) on board Solar Orbiter
Massa, Paolo; Krucker, Säm; Piana, Michele +12 more
Context. The Spectrometer and Telescope for Imaging X-rays (STIX) on board Solar Orbiter observes solar X-ray emission in the range of 4-150 keV and produces spectra and images of solar flares over a wide range of flare magnitudes. During nominal operation, STIX continuously generates data. A constant data flow requires fully automated data-proces…
Inferring the presence of very massive stars in local star-forming regions
Schaerer, D.; Martins, F.; Marques-Chaves, R. +1 more
Context. Very massive stars (VMS) have masses in excess of 100 M⊙ and are rare. However, owing to their powerful winds, very high luminosity, and efficient nucleosynthesis, they are key players of star-forming regions. In particular, their strong ionizing fluxes impact the surrounding interstellar medium.
Aims: We aim at detecting …
Delving deep: A population of extremely dusty dwarfs observed by JWST
Rodighiero, G.; Kartaltepe, J. S.; Dickinson, M. +21 more
Aims: We take advantage of the NIRCam photometric observations available as part of the Cosmic Evolution Early Release Science survey (CEERS) to identify and analyse very red sources in an effort to discover very dusty star forming galaxies.
Methods: We select red galaxies as objects with a S/N > 3 at 4.4 µm and a S/N < 2 in …
Uncovering the stellar structure of the dusty star-forming galaxy GN20 at z = 4.055 with MIRI/JWST
Ilbert, O.; Nørgaard-Nielsen, H. U.; Östlin, G. +35 more
Luminous infrared galaxies at high redshifts (z > 4) include extreme starbursts that build their stellar mass over short periods of time, that is, of 100 Myr or less. These galaxies are considered to be the progenitors of massive quiescent galaxies at intermediate redshifts (z ∼ 2) but their stellar structure and buildup is unknown. Here, we pr…
Gaia Data Release 3. Exploring and mapping the diffuse interstellar band at 862 nm
Prusti, T.; Mazeh, T.; Zucker, S. +444 more
Context. Diffuse interstellar bands (DIBs) are common interstellar absorption features in spectroscopic observations but their origins remain unclear. DIBs play an important role in the life cycle of the interstellar medium (ISM) and can also be used to trace Galactic structure.
Aims: Here, we demonstrate the capacity of the Gaia-Radial Veloc…
Catalogue of solar-like oscillators observed by TESS in 120-s and 20-s cadence
Li, Yaguang; Chaplin, William J.; Davies, Guy R. +12 more
Context. The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseismology to a pool of potential solar-like oscillators that is unprecedented in size.
Aims: We aim to produce a catalogue of solar-like oscillators observed …
Type II radio bursts and their association with coronal mass ejections in solar cycles 23 and 24
Kilpua, E. K. J.; Kumari, A.; Morosan, D. E. +1 more
Context. Meter-wavelength type II solar radio bursts are thought to be the signatures of shock-accelerated electrons in the corona. Studying these bursts can give information about the initial kinematics, dynamics, and energetics of coronal mass ejections (CMEs) in the absence of white-light observations.
Aims: We investigate the occurrence o…
SN 2020qlb: A hydrogen-poor superluminous supernova with well-characterized light curve undulations
Sollerman, J.; Bloom, J. S.; Omand, C. M. B. +21 more
Context. SN 2020qlb (ZTF20abobpcb) is a hydrogen-poor superluminous supernova (SLSN-I) that is among the most luminous (maximum Mg = −22.25 mag) and that has one of the longest rise times (77 days from explosion to maximum). We estimate the total radiated energy to be > 2.1 × 1051 erg. SN 2020qlb has a well-sampled light c…
Observational constraints on the origin of the elements. V. NLTE abundance ratios of [Ni/Fe] in Galactic stars and enrichment by sub-Chandrasekhar mass supernovae
Ruiter, A. J.; Seitenzahl, I. R.; Bergemann, M. +4 more
Aims: We constrain the role of different Type Ia supernova (SN Ia) channels in the chemical enrichment of the Galaxy by studying the abundances of nickel in Galactic stars. We investigated four different SN Ia sub-classes, including the classical single-degenerate near-Chandrasekhar mass (Mch) SN Ia, the fainter SN Iax systems asso…
Clumping and X-rays in cooler B supergiant stars
Bouret, J. -C.; Oskinova, L. M.; Sander, A. A. C. +6 more
Context. B supergiants (BSGs) are evolved stars with effective temperatures between ~10 to ~30 kK. Knowing the properties of these objects is important to understand massive star evolution. Located on the cool end of the line-driven wind regime, the study of their atmospheres can help us to understand the physics of their winds and phenomena such …