Search Publications
New multiple AGN systems with subarcsec separation: Confirmation of candidates selected via the novel GMP method
Marconi, A.; Vignali, C.; Rosati, P. +18 more
The existence of multiple active galactic nuclei (AGNs) at small projected distances on the sky is due to either the presence of multiple, inspiraling supermassive black holes, or to gravitational lensing of a single AGN. Both phenomena allow us to address important astrophysical and cosmological questions. However, few kiloparsec-separation multi…
The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data
Nagel, E.; Amado, P. J.; Caballero, J. A. +38 more
Context. Detecting a planetary companion in a short-period orbit through radio emission from the interaction with its host star is a new prospect in exoplanet science. Recently, a tantalising signal was found close to the low-mass stellar system GJ 1151 using LOFAR observations.
Aims: We studied spectroscopic time-series data of GJ 1151 in or…
A polarimetrically oriented X-ray stare at the accreting pulsar EXO 2030+375
Kaaret, Philip; Wu, Kinwah; Enoto, Teruaki +105 more
Accreting X-ray pulsars (XRPs) are presumed to be ideal targets for polarization measurements, as their high magnetic field strength is expected to polarize the emission up to a polarization degree of ∼80%. However, such expectations are being challenged by recent observations of XRPs with the Imaging X-ray Polarimeter Explorer (IXPE). Here, we re…
Deep low-frequency radio observations of Abell 2256. II. The ultra-steep spectrum radio halo
Brunetti, G.; Rossetti, M.; Dallacasa, D. +17 more
We present the first detailed analysis of the radio halo in the merging galaxy cluster Abell 2256 using the LOw Frequency ARray, the upgraded Giant Metrewave Radio Telescope, and the Karl G. Jansky Very Large Array. Radio observations (120 MHz-2 GHz) combined with archival Chandra and XMM-Newton X-ray data allowed us to study the central radio hal…
A sensitive APEX and ALMA CO(1-0), CO(2-1), CO(3-2), and [CI](1-0) spectral survey of 40 local (ultra-)luminous infrared galaxies
Weiss, A.; Aravena, M.; Severgnini, P. +8 more
We present a high sensitivity, ground-based spectral line survey of low-J carbon monoxide (CO(Jup → Jup − 1) with Jup = 1, 2, 3) and neutral carbon [CI] 3P1−3P0 ([CI](1-0)) in 36 local ultra-luminous infrared galaxies (ULIRGs) and 4 additional LIRGs, all of which have pre…
Detection of extended γ-ray emission around the Geminga pulsar with H.E.S.S.
Santangelo, A.; Quirrenbach, A.; Funk, S. +164 more
Geminga is an enigmatic radio-quiet γ-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy γ-ray emission around the pulsar was discovered by Milagro and later confirmed by HAWC, which are both water Cherenkov detector-based experiments. However, evidence for the Geminga pulsar wind nebula in gamma rays has long evade…
Peering into the young planetary system AB Pic. Atmosphere, orbit, obliquity, and second planetary candidate
Ginski, C.; Homeier, D.; Zhang, Y. +24 more
Aims: We aim to revisit the formation pathway of AB Pic b, an imaged companion that straddles the exoplanet/brown-dwarf boundary. We based this study on a rich set of observations, which allows us to investigate its orbital and atmospheric properties.
Methods: We composed a spectrum of AB Pic b by merging archival medium-resolution (~400…
CEERS: MIRI deciphers the spatial distribution of dust-obscured star formation in galaxies at 0.1 < z < 2.5
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +23 more
Aims: We study the stellar (i.e., rest-optical) and dust-obscured star-forming (i.e., rest-mid-infrared) morphologies (i.e., sizes and Sérsic indices) of star-forming galaxies (SFGs) at 0.1 < z < 2.5.
Methods: We combined Hubble Space Telescope (HST) images from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CA…
The Planck clusters in the LOFAR sky. VI. LoTSS-DR2: Properties of radio relics
Simionescu, A.; Zhang, X.; Di Gennaro, G. +19 more
Context. It is well established that shock waves in the intracluster medium launched by galaxy cluster mergers can produce synchrotron emission, which is visible to us at radio frequencies as radio relics. However, the particle acceleration mechanism producing these relics is still not fully understood. It is also unclear how relics relate to radi…
TDCOSMO. X. Automated modeling of nine strongly lensed quasars and comparison between lens-modeling software
Treu, T.; Sluse, D.; Suyu, S. H. +5 more
When strong gravitational lenses are to be used as an astrophysical or cosmological probe, models of their mass distributions are often needed. We present a new, time-efficient automation code for the uniform modeling of strongly lensed quasars with GLEE, a lens-modeling software for multiband data. By using the observed positions of the lensed qu…