Search
Now showing items 71-80 of 246
A LOFAR prompt search for radio emission accompanying X-ray flares in GRB 210112A
(2023-11-01)
The composition of relativistic gamma-ray burst (GRB) jets and their emission mechanisms are still debated, and they could be matter or magnetically dominated. One way to distinguish these mechanisms arises because a ...
JADES Initial Data Release for the Hubble Ultra Deep Field: Revealing the Faint Infrared Sky with Deep JWST NIRCam Imaging
(2023-11-01)
JWST has revolutionized the field of extragalactic astronomy with its sensitive and high-resolution infrared view of the distant Universe. Adding to the new legacy of JWST observations, we present the first NIRCam imaging ...
Simba-c : An updated chemical enrichment model for galactic chemical evolution in the SIMBA simulation
(2023-10-30)
We introduce a new chemical enrichment and stellar feedback model into GIZMO, using the SIMBA sub-grid models as a base. Based on the state-of-the-art chemical evolution model of Kobayashi et al., SIMBA-C tracks 34 elements ...
GA-NIFS: Black hole and host galaxy properties of two z-6.8 quasars from the NIRSpec IFU
(2023-10-20)
Aims. Integral field spectroscopy (IFS) with JWST NIRSpec will significantly improve our understanding of the first quasars, by providing spatially resolved, infrared spectroscopic capabilities that cover key rest-frame ...
Plausible association of distant late M dwarfs with low-frequency radio emission
(2023-10-17)
We present the serendipitous discovery of eight distant (> 50 pc) late M dwarfs with plausible associated radio emission at 144 MHz. The M-dwarf nature of our sources has been confirmed with optical spectroscopy performed ...
On the encounter between the GASP galaxy JO36 and the radio plume of GIN 049
(2023-10-16)
We report the serendipitous discovery of an unprecedented interaction between the radio lobe of a radio galaxy and a spiral galaxy. The discovery was made thanks to LOFAR observations at 144 MHz of the galaxy cluster A160 ...
Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared
(2023-10-13)
We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ∼700 au projected separation around a 15 Myr old stellar binary, using the APOLLO retrieval code on spectral ...
An Anisotropic Density Turbulence Model from the Sun to 1 au Derived from Radio Observations
(2023-10-13)
Solar radio bursts are strongly affected by radio-wave scattering on density inhomogeneities, changing their observed time characteristics, sizes, and positions. The same turbulence causes angular broadening and scintillation ...
The High-redshift Clusters Occupied by Bent Radio AGN (COBRA) Survey: Investigating the Role of Environment on Bent Radio AGNs Using LOFAR
(2023-10-13)
Bent radio active galactic nucleus (AGN) morphology depends on the density of the surrounding gas. However, bent sources are found inside and outside clusters, raising the question of how environment impacts bent AGN ...
No strong radio absorption detected in the low-frequency spectra of radio-loud quasars at z > 5.6
(2023-10-12)
We present the low-frequency radio spectra of nine high-redshift quasars at 5:6 < z < 6:6 using the Giant Metre Radio Telescope band-3, -4, and -5 observations (∼300-1200 MHz), archival Low Frequency Array (LOFAR; 144 MHz), ...