Exploring Compact Symmetric Objects Using VLBA and Fermi-LAT

  • CART Astrophysics Seminar Series

April 17, 2025 2:00 PM
PAIS 3205

Host:
Greg Taylor
Presenter:
Evan Sheldahl (UNM)
Compact symmetric objects (CSOs) are a unique class of jetted active galactic nuclei (AGN) defined by sub-kpc radio emission, showing radio structure on both sides of the central engine. CSOs tend to exhibit little to no relativistic beaming, thereby allowing us to determine their physical characteristics, and differentiating them from the vast majority of known jetted AGN. I will describe our sample selection criteria, VLBA observations, imaging, and analyses of 167 CSO candidates, in which we identified 65 new bona fide CSOs, thus almost doubling the number of known bona fide CSOs to 144. In the course of our study, we observed a number of CSOs with complex morphologies, including CSOs that appear to have morphologies akin to wide-angle tail (WAT) galaxies and candidates for supermassive binary black holes (SBBHs). I will also touch on current efforts using the Fermi Large Area Telescope (Fermi-LAT) to look for gamma-ray emission co-located with CSOs , which we would expect to see from radio galaxies with newly birthed jets.

Upcoming Events

Massless Particles and the Structure of the Visible Universe
Raza Sufian (NMSU)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Apr. 29, 2:00 PM
PAIS 3205

Interplanetary Scintillation with the Long Wavelength Array
Charlie Siders (UNM)
CART Astrophysics Seminar Series
May. 1, 2:00 PM
PAIS 3205

Single-Cavity Dual-Comb Lasers: Revolutionizing Spectroscopy, Long-Distance LiDAR and Pump-Probe Measurements
Ursula Keller (ETH Zurich, Switzerland)
Physics and Astronomy Colloquium
May. 2, 3:30 PM - May. 2, 4:30 PM
PAIS 1100

MIGDAL Optical TPC: Fitting Observations to Simulation
Dustin Edgeman (UNM)
Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
May. 6, 2:00 PM
PAIS 3205

TBD
Wilber Dominguez (UNM)
CART Astrophysics Seminar Series
May. 8, 2:00 PM
PAIS 3205