The 1.28 GHz MeerKAT Galactic Center Mosaic

  title={The 1.28 GHz MeerKAT Galactic Center Mosaic},
  author={Ian Heywood and I. Rammala and Fernando Camilo and William D. Cotton and F Yusef-Zadeh and Thomas Abbott and R. M. Adam and Grant Adams and M. A. Aldera and K M B Asad and E. F. Bauermeister and Thomas G. Bennett and Hertzog L. Bester and Willem A. Bode and D. H. Botha and A. G. Botha and L. R. S. Brederode and Sarah Buchner and Johan Petrus Burger and Tom Cheetham and D. I. L. de Villiers and M. A. Dikgale-Mahlakoana and L.J. du Toit and S. W. P. Esterhuyse and Bernie Fanaroff and Sean February and D. J. Fourie and B. S. Frank and R. R. G. Gamatham and Marisa Geyer and Sharmila Goedhart and M. Gouws and S. C. Gumede and M. J. Hlakola and A. Hokwana and S. W. Hoosen and J. M. G. Horrell and B. Hugo and A. Isaacson and Gyula I. G. J'ozsa and Justin L. Jonas and Anton Joubert and Roufurd P. M. Julie and François Kapp and Jonathan S. Kenyon and P. P. A. Kotz'e and N. Kriek and Henno Kriel and V. K. Krishnan and Robert Lehmensiek and D. D. Liebenberg and Rachel Lord and B. M. Lunsky and K. Madisa and Lindsay Magnus and Omer Kamal Mahgoub and A. Makhaba and Sphesihle Makhathini and Jocias A. Malan and Jason R. Manley and S. J. Marais and Andrew Martens and T. Mauch and Brian C Merry and Rob Millenaar and N. Mnyandu and O. J. Mokone and T. E. Monama and M. C. Mphego and Wesley New and B. Ngcebetsha and K. J. Ngoasheng and Muhammed Toufeeq Ockards and Nadeem Oozeer and Abraham J. Otto and S. S. Passmoor and A. A. Patel and Adriaan Peens-Hough and Simon Perkins and Athanaseus J T Ramaila and Niruj Mohan Ramanujam and Zwivhuya Romeo Ramudzuli and S. M. Ratcliffe and A. Robyntjies and S. Salie and Naveen Kumar Sambu and C. T. G. Schollar and Ludwig Schwardt and R. L. Schwartz and Maciej Serylak and Renier Siebrits and Sandeep Kumar Sirothia and Martin J. Slabber and Oleg M. Smirnov and L. Sofeya and Benjamin Taljaard and Cyril Tasse and Adrian John Tiplady and O. Toruvanda and Samuel Twum and Tyrone van Balla and Andrew van der Byl and Carel van der Merwe and Verees{\'e} van Tonder and Renay Van Wyk and Al J. Venter and Mariet Venter and Bruce Wallace and Marc G. Welz and L. P. Williams and B. Xaia},
  journal={The Astrophysical Journal},
The inner ∼200 pc region of the Galaxy contains a 4 million M⊙ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic-ray energy densities that are roughly two orders of magnitude higher than the corresponding levels in the Galactic disk. At a distance of only 8.2 kpc, the region presents astronomers with a unique opportunity to study a diverse range of energetic astrophysical phenomena, from stellar objects in extreme environments, to the SMBH… 

Populations of Magnetized Filaments in the Intracluster Medium and the Galactic Center

Magnetized radio filaments are found in abundance in the inner few hundred parsecs of our galaxy. Progress in understanding this population of filaments has been slow over the last few decades, in

Statistical Properties of the Population of the Galactic Center Filaments: the Spectral Index and Equipartition Magnetic Field

We present high-pass-filtered continuum images of the inner 3.°5 × 2.°5 of the Galactic center at 20 cm with 6.″4 resolution. These mosaic images are taken with MeerKAT and reveal a large number of

Neutrino Solar Orbiting Laboratory: νSOL Galactic Core: GC Supermassive Black Hole: SMBH Active Galactic Nucleus: AGN Astronomical Unit: AU Ultra-High Energy: UHE

I discuss the feasibility of a conceptual space-based neutrino detector that utilizes the Ice Giants as Targets for Galactic Neutrinos. The purpose of this research stems from the concept of wanting

The road toward imaging a black hole: A personal perspective

The images of the supermassive black holes Sgr A* and M87* by the Event Horizon Telescope (EHT) collaboration mark a special milestone in the history of the subject. For the first time we are able to

A Candle in the Wind: A Radio Filament in the Core of the A3562 Galaxy Cluster

Using a MeerKAT observation of the galaxy cluster A3562 (a member of the Shapley supercluster), we have discovered a narrow, long and straight, very faint radio filament, which branches out at a

The Curious Case of the “Heartworm” Nebula

The curious Galactic features near G357.2−0.2 were observed with the MeerKAT radio interferometer array in the UHF and L bands (0.56–1.68 GHz). There are two possibly related features: a newly

Low-energy cosmic rays: regulators of the dense interstellar medium

  • S. Gabici
  • Physics
    The Astronomy and Astrophysics Review
  • 2022
Low-energy cosmic rays (up to the GeV energy domain) play a crucial role in the physics and chemistry of the densest phase of the interstellar medium. Unlike interstellar ionising radiation, they can



Cosmic-ray-driven outflow from the Galactic Centre and the origin of magnetized radio filaments

Radio, X-ray, and infrared observations of the inner few hundred parsecs of the Galactic Centre have highlighted two characteristics of the interstellar medium. The cosmic-ray ionization rate


We present images of the Sagittarius (Sgr) B giant molecular cloud at 1384 and 2368 MHz obtained using new, multi-configuration Australia Telescope Compact Array observations. We have combined these

Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event

Radio imaging reveals a bipolar bubble structure, with an overall span of 1 degree by 3 degrees, extending above and below the Galactic plane and apparently associated with the Galactic Centre, which is postulate to be the principal source of the relativistic particles required to power the synchrotron emission of the radio filaments within and in the vicinity of the bubble cavities.

The ALADIN interactive sky atlas - A reference tool for identification of astronomical sources

The Aladin interactive sky atlas, developed at CDS, is a service providing simultaneous access to digitized images of the sky, astronomical catalogues, and databases. The driving motivation is to

Rendering Tool for Astronomy Zenodo

  • ApJ,
  • 1996

GLOSTAR: Radio Source Catalog I. 28° <  ℓ < 36° and |b| < 1°

Context. Radio continuum surveys of the Galactic plane are an excellent way to identify different source populations such as planetary nebulae, H II regions, and radio stars and characterize their

On the nature of the dark mass in the centre of the Milky Way

We discuss constraints on the properties and nature of the dark mass concentration at the core of the Milky Way. We present 0.15-arcsec astrometric K-band maps in five epochs beween 1992 and 1996.

A cluster of He I emission-line stars in the Galactic center

We report 1″.9/300 km s −1 resolution imaging spectroscopy of He I n=2 1 P→n=2 1 S 2.06 μm line emission in the Galactic center. There is a group of about a dozen compact, broad-line He I