An Overview of the MHONGOOSE Survey: Observing Nearby Galaxies with MeerKAT

Blok, W. J. G. de; Adams, Elizabeth A. K.; Amram, P.; Athanassoula, E.; Bagetakos, Ioannis; Balkowski, C.; Bershady, M. A.; Beswick, R. J.; Bigiel, Frank; Blyth, S. L.; Bosma, A.; Booth, R. S.; Bouchard, Antoine; Brinks, E.; Carignan, C.; Chemin, L.; Combes, F.; Conway, Joan M.; Elson, Edward C.; English, Jayanne; Épinat, B.; Frank, B. S.; Fiege, Jason D.; Fraternali, Filippo; Gallagher, J.; Gibson, Brad K.; Heald, G.; Henning, P. A.; Holwerda, Benne W.; Jarrett, T. H.; Jerjen, H.; Józsa, G. I. G.; Kapala, Maria; Klöckner, H. R.; Koribalski, Baerbel; Kraan-Korteweg, R. C.; Léon, S.; Leroy, Adam K.; Loubser, S. I.; Lucero, D. M.; McGaugh, Stacy S.; Meurer, G. R.; Meyer, M.; Mogotsi, Moses; Namumba, B.; Oh, Se–Heon; Oosterloo, Thomas; Pisano, D. J.; Popping, Attila; Ratcliffe, S.; Sellwood, J. A.; Schinnerer, E.; Schröder, A. C.; Sheth, Kartik; Smith, M. W. L.; Sorgho, A.; Spekkens, Kristine; Stanimirović, Snežana; Heyden, K. J. van der; Verdes–Montenegro, L.; Driel, W.D. van; Walter, Fabian; Westmeier, T.; Wilcots, Eric M.; Williams, T. B.; Wong, O. Ivy; Woudt, P. A.; Zijlstra, A. A.

doi:10.22323/1.277.0007

Cited by 10 publications

(4 citation statements)

References 42 publications

(63 reference statements)

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“…The latter inclination is optimal for kinematical modelling. A more complete description of the sample selection is given in de Blok et al (2018). Five of the 30 MHONGOOSE galaxies were observed with KAT-7.…”

Section: Samplementioning

confidence: 99%

Early observations of the MHONGOOSE galaxies: getting ready for MeerKAT

Sorgho

Carignan

Pisano

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We present early observations of 20 galaxies in the MHONGOOSE survey galaxies using KAT-7, the GBT, and MeerKAT. We present the best calibrators for five of the MHONGOOSE galaxies observed with the KAT-7, and search for signs of gas accretion in the GBT data, down to 3σ column density levels of 2.2 × 10 18 cm −2 over a 20 km s −1 line width, but identify none. Using the KAT-7 and MeerKAT data, we have derived rotation curves and mass models for NGC 3621 and NGC 7424 out to an unprecedented extent. As a precursor to the SKA, the MeerKAT telescope combines both a high spatial resolution and a large field of view, necessary to map the extended neutral hydrogen in local galaxies. The mass models of the two galaxies were constructed for both the Dark Matter (DM) models (the pseudo-isothermal model and the Navarro-Frenk-White model) and MOND. Overall, we find that the DM models provide a better fit than MOND to the galaxies' rotation curves. Furthermore, the pseudo-isothermal model is found to be the most consistent with the observations.

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Section: Samplementioning

confidence: 99%

Early observations of the MHONGOOSE galaxies: getting ready for MeerKAT

Sorgho

Carignan

Pisano

et al. 2018

Monthly Notices of the Royal Astronomical Society

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“…MeerKAT. Several MeerKAT Large Survey Projects (LSPs) incorporate a polarization component, including in imaging mode: the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) [201]; commensal polarimetry with the deep H I LADUMA (Looking at the Distant Universe with the MeerKAT Array) 10 project [202]; and MHONGOOSE (MeerKAT H I Observations of Nearby Galactic Objects -Observing Southern Emitters) 11 [203]. The MIGHTEE project team is planning complementary observations with the upgraded Giant Metrewave Radio Telescope (GMRT) to provide combined deep polarimetry of several square degrees with semi-contiguous frequency coverage from 300-2500 MHz.…”

Section: Denser Rm Gridmentioning

confidence: 99%

Magnetism Science with the Square Kilometre Array

Heald¹,

Mao

Vacca³

et al. 2020

Galaxies

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The Square Kilometre Array (SKA) will answer fundamental questions about the origin, evolution, properties, and influence of magnetic fields throughout the Universe. Magnetic fields can illuminate and influence phenomena as diverse as star formation, galactic dynamics, fast radio bursts, active galactic nuclei, large-scale structure, and dark matter annihilation. Preparations for the SKA are swiftly continuing worldwide, and the community is making tremendous observational progress in the field of cosmic magnetism using data from a powerful international suite of SKA pathfinder and precursor telescopes. In this contribution, we revisit community plans for magnetism research using the SKA, in light of these recent rapid developments. We focus in particular on the impact that new radio telescope instrumentation is generating, thus advancing our understanding of key SKA magnetism science areas, as well as the new techniques that are required for processing and interpreting the data. We discuss these recent developments in the context of the ultimate scientific goals for the SKA era.

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“…We selected our sample of disk galaxies from the source list of the MeerKAT HI Observations of Nearby Galactic Objects: Observing Southern Emitters survey 1 , "MHONGOOSE" (de Blok et al 2016). The survey will secure very high sensitivity atomic hydrogen images of a sample of nearby galaxies.…”

Section: Sample Selectionmentioning

confidence: 99%

Broad-band radio polarimetry of disc galaxies and AGN with KAT-7

Legodi

Stil

2020

Monthly Notices of the Royal Astronomical Society

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We report broad-band (1.2 - 1.9 GHz) radio continuum observations at arcminute resolutions of two nearby disk galaxies, NGC 1808 and NGC 1097, and four AGN powered radio sources; PKS B1934 − 638, PKS B0407 − 658, J0240 − 231, and J0538 − 440. We use Rotation Measure Synthesis to analyze their Faraday complexity. Observations were made with the KAT 7 radio telescope array, in South Africa. The AGN powered sources fall into two “Faraday” categories – simple and complex. The most polarized sources, J0538 − 440 and J0240 − 231, are found to have complex Faraday spectra that can be time variable (J0538 − 440 case) and also indicative of complex Faraday emitting and rotating components along the line of sight. PKS B0407 − 658 shows a simple Faraday spectrum while PKS B1934 − 638 is undetected in polarization. The disk galaxies are classified as complex, albeit at low signal-to-noise. This may indicate depolarization due to turbulence of the magnetised plasma in the bar and circumnuclear regions and/or frequency-dependent depolarization at L-band.

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An Overview of the MHONGOOSE Survey: Observing Nearby Galaxies with MeerKAT

Cited by 10 publications

References 42 publications

Early observations of the MHONGOOSE galaxies: getting ready for MeerKAT

Early observations of the MHONGOOSE galaxies: getting ready for MeerKAT

Magnetism Science with the Square Kilometre Array

Broad-band radio polarimetry of disc galaxies and AGN with KAT-7

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