Journal
ASTRONOMY & ASTROPHYSICS
Volume 646, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/202039655
Keywords
surveys; galaxies: evolution; galaxies: star formation; galaxies: kinematics and dynamics; radio lines: galaxies
Categories
Funding
- Bundesministerium fur Bildung und Forschung (BMBF) [05A2017]
- Africa-Oxford Visiting Fellows Programme
- Oxford Hintze Centre for Astrophysical Surveys - Hintze Family Charitable Foundation
- STFC [ST/S000488/1, ST/N000919/1]
- Science and Technology Facilities Council (STFC) [ST/R505006/1]
- Glasstone Foundation
- WISE research programme - Netherlands Organisation for Scientific Research (NWO)
- U.K. Royal Society
- South African Radio Astronomy Observatory (SARAO)
- National Research Foundation [84156]
- Italian Ministry of Foreign Affairs and International Cooperation, Directorate General for the Country Promotion [ZA18GR02]
- South African Department of Science and Technology's National Research Foundation (DST-NRF) [113121]
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation
- STFC [ST/S000488/1, ST/R000972/1] Funding Source: UKRI
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The HI emission project within the MIGHTEE survey is conducted with the MeerKAT radio telescope, aiming to extend our knowledge of HI emission to z=0.6 and study the evolution of neutral gas content in galaxies over the past 5 billion years. The survey is expected to directly detect nearly 3000 galaxies in HI within 0< z< 0.4, with statistical detections extending to z=0.6.
We present the HI emission project within the MIGHTEE survey, currently being carried out with the newly commissioned MeerKAT radio telescope. This is one of the first deep, blind, medium-wide interferometric surveys for neutral hydrogen (HI) ever undertaken, extending our knowledge of HI emission to z=0.6. The science goals of this medium-deep, medium-wide survey are extensive, including the evolution of the neutral gas content of galaxies over the past 5 billion years. Simulations predict nearly 3000 galaxies over 0< z< 0.4 will be detected directly in HI, with statistical detections extending to z=0.6. The survey allows us to explore HI as a function of galaxy environment, with massive groups and galaxy clusters within the survey volume. Additionally, the area is large enough to contain as many as 50 local galaxies with HI mass < 10(8)M(), which allows us to study the low-mass galaxy population. The 20 deg(2) main survey area is centred on fields with exceptional multi-wavelength ancillary data, with photometry ranging from optical through far-infrared wavelengths, supplemented with multiple spectroscopic campaigns. We describe here the survey design and the key science goals. We also show first results from the Early Science observations, including kinematic modelling of individual sources, along with the redshift, HI, and stellar mass ranges of the sample to date.
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