$GALAC galactic

Latest papers

1. Probing the Interstellar Medium towards the Double Pulsar and the Gum Nebula using Low-Frequency Pulse Broadening Measurements astro-ph.HE · 19 Oct · 1 hit

   …density and turbulence parameters of the Gum Nebula region, and we discuss implications for models of the Galactic electron density distribution. Our current data yield a dispersion measure (DM) precision of ~4 x…

2. Pulse Morphology and Spectral Study of LPT J1634+44 Using GMRT astro-ph.HE · 19 Oct · 1 hit

   Long-period radio transients (LPTs) are a recently discovered class of Galactic coherent radio emitters characterized by rotation periods of minutes to hours and highly polarized…

3. The Solar System through dust maps. Encounter statistics with interstellar gas astro-ph.GA · 19 Oct · 2 hits

   …We use Gaia-based 3D dust maps of the Solar neighborhood, sampled by integrating the Solar System along its Galactic orbit while rigidly translating the maps. From the resulting density time series, encounter…

4. A high-Galactic-altitude scattering screen: scintillation from Globular Cluster pulsar M53A astro-ph.GA · 19 Oct · 5 hits

   While known interstellar scattering screens are largely confined to the Galactic disk, the scattering properties of the circumgalactic medium (CGM) in the deep Galactic halo have…

5. Velocity-resolved Ionization Mapping of the Broad-line Region. II. Signatures of Eccentric Broad-line Regions from a Quantitative Photoionization-Based Model astro-ph.GA · 19 Oct · 1 hit

   …is one of the most powerful tools for probing the geometry and kinematics of the broad-line region in active galactic nuclei. However, its interpretation may be non-unique, as similar velocity-delay signatures can…

6. Exothermic Dark Matter with a Dark Higgs: The LZ 248 keV Event and the Galactic Center Excess hep-ph · 18 Oct · 2 hits

   …minimum. For a dark Higgs boson near the dark photon mass, the heavier branch agrees with the southern-sky Galactic Center $\gamma$-ray excess.

7. Tidal Disruption Events in Active Galactic Nuclei: Thermal Radiation and Jets astro-ph.HE · 17 Oct · 2 hits

   …requisite magnetic flux has not been identified. A non-negligible fraction of TDEs are expected in Active Galactic Nuclei (AGNs), where a magnetized accretion flow is already present. As shown first by Chan et al.…

8. The Impact of an AGN on PAH Spectral Features in Galaxy Evolution Simulations: Continuum Dilution and Excitation of PAHs astro-ph.GA · 17 Oct · 1 hit

   Galaxies hosting an active galactic nucleus (AGN) show diminished power and non-standard spectral feature ratios from polycyclic…