Search Publications
Reaching the boundary between stellar kinematic groups and very wide binaries. IV. The widest Washington Double Star systems with ρ ≥ 1000 arcsec in Gaia DR3
Caballero, J. A.; Cortés-Contreras, M.; González-Payo, J.
Aims: With the latest Gaia DR3 data, we analyse the widest pairs in the Washington Double Star (WDS) catalogue with angular separations, ρ, greater than 1000 arcsec.
Methods: We confirmed the pairs' membership to stellar systems based on common proper motions, parallaxes, and (when available) radial velocities, together with the locii of…
Another X-ray UFO without a momentum-boosted molecular outflow. ALMA CO(1-0) observations of the galaxy pair IRAS 05054+1718
Vignali, Cristian; Reeves, James N.; Dotti, Massimo +8 more
We present Atacama Large Millimetre/submillimetre Array (ALMA) CO(1-0) observations of the nearby infrared luminous (LIRG) galaxy pair IRAS 05054+1718 (also known as CGCG 468-002), as well as a new analysis of X-ray data of this source collected between 2012 and 2021 using the Nuclear Spectroscopic Telescope Array (NuSTAR), Swift, and the XMM-Newt…
Tracking magnetic flux and helicity from the Sun to Earth. Multi-spacecraft analysis of a magnetic cloud and its solar source
Temmer, M.; Veronig, A. M.; Dumbović, M. +5 more
Aims: We analyze the complete chain of effects - from the Sun to Earth - caused by a solar eruptive event in order to better understand the dynamic evolution of magnetic-field-related quantities in interplanetary space, in particular that of magnetic flux and helicity.
Methods: We study a series of connected events - a confined C4.5 flar…
Discovery and physical characterization as the first response to a potential asteroid collision: The case of 2023 DZ2
Licandro, J.; Alarcon, M. R.; Hudin, L. +15 more
Context. Near-Earth asteroids (NEAs) that may evolve into impactors deserve detailed threat assessment studies. Early physical characterization of a would-be impactor may help in optimizing impact mitigation plans. We first detected NEA 2023 DZ2 on 27 February 2023. After that, it was found to have a minimum orbit intersection distance …
Resolved Kennicutt-Schmidt law in two strongly lensed star-forming galaxies at redshift 1
Richard, Johan; Sun, Jiayi; Combes, Françoise +4 more
We study the star formation rate (SFR) vs. molecular gas mass (Mmol) scaling relation from hundreds to thousands of parsec in two strongly lensed galaxies at redshift z ∼ 1, the Cosmic Snake and A521. We trace the SFR using extinction-corrected rest-frame UV observations with the Hubble Space Telescope (HST), and Mmol using d…
Galaxy populations in the most distant SPT-SZ clusters. II. Galaxy structural properties in massive clusters at 1.4 ≲ z ≲ 1.7
Bayliss, M. B.; Sharon, K.; Pannella, M. +12 more
We investigate structural properties of massive galaxy populations in the central regions (< 0.7 r500) of five very massive (M200 > 4 × 1014 M⊙), high-redshift (1.4 ≲ z ≲ 1.7) galaxy clusters from the 2500 deg2 South Pole Telescope Sunyaev Zel'dovich effect (SPT-SZ) survey. We probe the …
A Herschel study of the high-mass protostar IRAS 20126+4104
Testi, L.; Molinari, S.; Lorenzani, A. +3 more
We performed Herschel observations of the continuum and line emission from the high-mass star-forming region IRAS 20126+4104, which hosts a well-studied B-type (proto)star powering a bipolar outflow and is associated with a Keplerian circumstellar disk. The continuum images at six wavelengths allowed us to derive an accurate estimate of the bolome…
A multi-wavelength view of the multiple activity cycles of ϵ Eridani
Czesla, S.; Schneider, P. C.; Stelzer, B. +3 more
ϵ Eridani is a highly active young K2 star with an activity cycle of about 3 yr established using Ca II H& K line index measurements (SMWO). This relatively short cycle has been demonstrated to be consistent with X-ray and magnetic flux measurements. Recent work suggested a change in the cyclic behaviour. Here, we report new X-ray f…
Extinction towards the cluster R136 in the Large Magellanic Cloud. An extinction law from the near-infrared to the ultraviolet
Kaper, Lex; Brands, Sarah A.; Crowther, Paul A. +4 more
Context. The cluster R136 in the giant star-forming region 30 Doradus in the Large Magellanic Cloud (LMC) offers a unique opportunity to resolve a stellar population in a starburst-like environment. Knowledge of the extinction towards this region is key for the accurate determination of stellar masses, and for the correct interpretation of observa…
The contribution of faint Lyman-α emitters to extended Lyman-α halos constrained by MUSE clustering measurements
Krumpe, M.; Wisotzki, L.; Miyaji, T. +3 more
Recent detections of extended Lyman-α halos around Lyα emitters (LAEs) have been reported on a regular basis, but their origin is still under investigation. Simulation studies predict that the outer regions of the extended halos contain a major contribution from the Lyα emission of faint, individually undetected LAEs. To address this matter from a…