Search Publications
Geminga's pulsar halo: An X-ray view
Woo, Jooyun; Hailey, Charles J.; Mori, Kaya +6 more
Geminga is the first pulsar around which a remarkable gamma-ray halo extending over a few degrees was discovered at TeV energies by MILAGRO and HAWC and later by H.E.S.S., and by Fermi-LAT in the GeV band. More middle-aged pulsars have exhibited gamma-ray halos, and they are now recognised as an emerging class of Galactic gamma-ray sources. The em…
The asymmetric bipolar [Fe II] jet and H2 outflow of TMC1A resolved with the JWST NIRSpec Integral Field Unit
Pontoppidan, K. M.; Bjerkeli, P.; Kristensen, L. E. +10 more
Context. Protostellar outflows exhibit large variations in their structure depending on the observed gas emission. To understand the origin of the observed variations, it is important to analyze the differences in the observed morphology and kinematics of the different tracers. The James Webb Space Telescope (JWST) allows us to study the physical …
The carbon-rich type Ic supernova 2016adj in the iconic dust lane of Centaurus A: Potential signatures of an interaction with circumstellar hydrogen
Della Valle, M.; Gromadzki, M.; Galbany, L. +26 more
We present a comprehensive data set of supernova (SN) 2016adj located within the central dust lane of Centaurus A. SN 2016adj is significantly reddened and after correcting the peak apparent B-band magnitude (mB = 17.48 ± 0.05) for Milky Way reddening and our inferred host-galaxy reddening parameters (i.e., RVhost …
Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost
Guiglion, G.; Valentini, M.; Jordi, C. +14 more
With Gaia Data Release 3 (DR3), new and improved astrometric, photometric, and spectroscopic measurements for 1.8 billion stars have become available. Alongside this wealth of new data, however, there are challenges in finding efficient and accurate computational methods for their analysis. In this paper, we explore the feasibility of using machin…
High contrast at short separation with VLTI/GRAVITY: Bringing Gaia companions to light
Lutz, D.; Genzel, R.; Sturm, E. +171 more
Context. Since 2019, GRAVITY has provided direct observations of giant planets and brown dwarfs at separations of down to 95 mas from the host star. Some of these observations have provided the first direct confirmation of companions previously detected by indirect techniques (astrometry and radial velocities). Aims. We want to improve the observi…
Impact of far-side structures observed by Solar Orbiter on coronal and heliospheric wind simulations
Parenti, S.; Strugarek, A.; Brun, A. S. +4 more
Context. Solar Orbiter is a new space observatory that provides unique capabilities to understand the heliosphere. In particular, it has made several observations of the far-side of the Sun and therefore provides unique information that can greatly improve space weather monitoring.
Aims: In this study, we aim to quantify how the far-side data…
Magnetic activity of red giants: Correlation between the amplitude of solar-like oscillations and chromospheric indicators
Godoy-Rivera, D.; Gaulme, P.; Gehan, C.
Previous studies have found that red giants (RGs) in close binary systems undergoing spin-orbit resonance exhibit an enhanced level of magnetic activity with respect to single RGs rotating at the same rate, from measurements of photometric variability, Sph', and the chromospheric emission S-index, SCa II. Here, we …
Extreme ionizing properties of a metal-poor, MUV ≃ ‑12 star complex in the first gigayear
Frye, B. L.; Dickinson, M.; Zanella, A. +38 more
We report the serendipitous discovery of a faint (MUV > ‑12.2), low-metallicity (Z ∼ 0.02 Z⊙) ionizing source, dubbed T2c, with a spectroscopic redshift of z = 6.146. T2c is part of a larger structure amplified by the Hubble Frontier Field galaxy cluster MACSJ0416 and was observed with the James Webb Space Telescope (JWST) NIRSpec in…
Spectroscopic evidence of cool plasma in quiet Sun small-scale brightenings detected by HRIEUV on board Solar Orbiter
Parenti, S.; Bocchialini, K.; Dolliou, A.
Context. A large number of small and short-lived EUV brightenings have been detected in the quiet Sun (QS) over the past three years by the High Resolution Imager of the Extreme Ultraviolet Imager (HRIEUV) on board Solar Orbiter. It remains uncertain whether these events reach coronal temperatures and, thus, whether they directly contribute to cor…
Probing atmospheric escape through metastable He I triplet lines in 15 exoplanets observed with SPIRou
Moutou, C.; Carmona, A.; López-Puertas, M. +23 more
For several years, the metastable helium triplet line has been successfully used as a tracer to probe atmospheric escape in transiting exoplanets. This absorption in the near-infrared (1083.3 nm) can be observed from the ground using high-resolution spectroscopy, providing new constraints on the mass-loss rate and the temperature characterizing th…