Search Publications
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…
A partially stripped massive star in a Be binary at low metallicity. A missing link towards Be X-ray binaries and double neutron star mergers
Hamann, W. -R.; Oskinova, L. M.; Sander, A. A. C. +4 more
Standard binary evolutionary models predict a significant population of core helium-burning stars that lost their hydrogen-rich envelope after mass transfer via Roche-lobe overflow. However, there is a scarcity of observations of such stripped stars in the intermediate-mass regime (∼1.5 − 8 M⊙), which are thought to be prominent progeni…
Comparative analysis of atmospheric parameters from high-resolution spectroscopic sky surveys: APOGEE, GALAH, Gaia-ESO
Jofré, Paula; Stringfellow, Guy S.; Mészáros, Szabolcs +5 more
Context. SDSS-IV APOGEE-2, GALAH, and Gaia-ESO are high-resolution, ground-based, multi-object spectroscopic surveys providing fundamental stellar atmospheric parameters and multiple elemental abundance ratios for hundreds of thousands of stars of the Milky Way. Data from these and other surveys contribute to investigations of the history and evol…
Extragalactic fast X-ray transient candidates discovered by Chandra (2014-2022)
Bauer, F. E.; Brandt, W. N.; Xue, Y. Q. +9 more
Context. Extragalactic fast X-ray transients (FXTs) are short flashes of X-ray photons of unknown origin that last a few minutes to hours.
Aims: We extend the previous search for extragalactic FXTs (based on sources in the Chandra Source Catalog 2.0, CSC2) to further Chandra archival data between 2014 and 2022.
Methods: We extracted X-ra…
The multiplicity fraction in 202 open clusters from Gaia
Castro-Ginard, A.; Jordi, C.; Casamiquela, L. +7 more
In this study, we estimate the fraction of binaries with high mass ratios for 202 open clusters in the extended solar neighbourhood (closer than 1.5 kpc from the Sun). This is one of the largest homogeneous catalogues of multiplicity fractions in open clusters to date, including the unresolved and total (close-binary) multiplicity fractions of mai…
Gaia Data Release 3. Rotational modulation and patterns of colour variation in solar-like variables
Audard, M.; Pagano, I.; Rimoldini, L. +15 more
Context. The Gaia third Data Release (GDR3) presents a catalogue of 474 026 stars (detected by processing a sample of about 30 million late-type stars) with variability induced by magnetic activity. About 430 000 of these stars are newly discovered variables. For each star, the catalogue provides a list of about 70 parameters among which the most …