MIGHTEE-H <scp>i</scp>: deep spectral line observations of the COSMOS field-Reference-Cited by-同舟云学术

MIGHTEE-H i: deep spectral line observations of the COSMOS field

Published:2024-09-05 Issue:1 Volume:534 Page:76-96
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Heywood I¹²³^ORCID,Ponomareva A A¹^ORCID,Maddox N⁴^ORCID,Jarvis M J¹⁵^ORCID,Frank B S³⁶⁷⁸,Adams E A K⁹¹⁰,Baes M¹¹^ORCID,Bianchetti A¹²¹³,Collier J D⁸¹⁴,Deane R P¹⁵¹⁶^ORCID,Glowacki M¹⁷^ORCID,Jung S L¹^ORCID,Pan H¹^ORCID,Rajohnson S H A⁷^ORCID,Rodighiero G¹²¹³^ORCID,Ruffa I¹⁸¹⁹^ORCID,Santos M G³⁵,Sinigaglia F²⁰²¹,Vaccari M⁸¹⁸^ORCID

Affiliation:

1. Astrophysics, Department of Physics, University of Oxford , Keble Road, Oxford OX1 3RH , UK

2. Centre for Radio Astronomy Techniques and Technologies, Department of Physics and Electronics, Rhodes University , PO Box 94, Makhanda 6140 , South Africa

3. South African Radio Astronomy Observatory , 2 Fir Street, Black River Park, Observatory 7925 , South Africa

4. School of Physics, H.H. Wills Physics Laboratory, Tyndall Avenue, University of Bristol , Bristol BS8 1TL , UK

5. Department of Physics and Astronomy, University of the Western Cape , Robert Sobukwe Road, 7535 Bellville, Cape Town , South Africa

6. STFC UK Astronomy Technology Centre, Royal Observatory , Edinburgh, Blackford Hill, Edinburgh EH9 3HJ , UK

7. Department of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701 , South Africa

8. The Inter-University Institute for Data Intensive Astronomy (IDIA), and University of Cape Town , Private Bag X3, Rondebosch 7701 , South Africa

9. ASTRON, the Netherlands Institute for Radio Astronomy , Oude Hoogeveesedijk 4, NL-7991 PD Dwingeloo , the Netherlands

10. Kapteyn Astronomical Institute, University of Groningen , PO Box 800, NL-9700 AV Groningen , the Netherlands

11. Sterrenkundig Observatorium, Universiteit Gent , Krijgslaan 281 S9, B-9000 Gent , Belgium

12. Department of Physics and Astronomy, Università degli Studi di Padova , Vicolo dell’Osservatorio 3, I-35122 Padova , Italy

13. INAF – Osservatorio Astronomico di Padova , Vicolo dell’Osservatorio 5, I-35122 Padova , Italy

14. Curtin Institute for Radio Astronomy , 1 Turner Ave, Bentley, WA 6102 , Australia

15. Wits Centre for Astrophysics, University of the Witwatersrand , 1 Jan Smuts Avenue, 2000 Johannesburg , South Africa

16. Department of Physics, University of Pretoria , Hatfield, Pretoria 0028 , South Africa

17. International Centre for Radio Astronomy Research (ICRAR), Curtin University , Bentley, WA 6102 , Australia

18. Cardiff Hub for Astrophysics Research and Technology, School of Physics and Astronomy, Cardiff University , Queens Buildings, The Parade, Cardiff CF24 3AA , UK

19. INAF-Istituto di Radioastronomia , via Gobetti 101, I-40129 Bologna , Italy

20. Département d’Astronomie, Université de Genève , Chemin Pegasi 51, CH-1290 Versoix , Switzerland

21. Institut für Astrophysik, Universität Zürich , Winterthurerstrasse 190, CH-8057 Zürich , Switzerland

Abstract

ABSTRACT The MIGHTEE survey utilizes the South African MeerKAT radio telescope to observe four extragalactic deep fields, with the aim of advancing our understanding of the formation and evolution of galaxies across cosmic time. MIGHTEE’s frequency coverage encompasses the $\textrm {H}\scriptstyle \mathrm{I}$ line to a redshift of z $\simeq$ 0.58, and OH megamasers to z $\simeq$ 0.9. We present the MIGHTEE-$\textrm {H}\scriptstyle \mathrm{I}$ imaging products for the COSMOS field, using a total of 94.2 h on-target and a close-packed mosaic of 15 individual pointings. The spectral imaging covers two broad, relatively interference-free regions (960–1150 and 1290–1520 MHz) within MeerKAT’s L-band, with up to 26 kHz spectral resolution (5.5 km s$^{-1}$ at z = 0). The median noise in the highest spectral resolution data is 74 μJy beam$^{-1}$, corresponding to a 5$\sigma$$\textrm {H}\scriptstyle \mathrm{I}$ mass limit of 10$^{8.5}$ M$_{\odot }$ for a 300 km s$^{-1}$ line at z = 0.07. The mosaics cover $\gt $4 deg$^{2}$, provided at multiple angular resolution / sensitivity pairings, with an angular resolution for $\textrm {H}\scriptstyle \mathrm{I}$ at z = 0 of 12 arcsec. We describe the spectral line processing workflow that will be the basis for future MIGHTEE-$\textrm {H}\scriptstyle \mathrm{I}$ products, and validation of, and some early results from, the spectral imaging of the COSMOS field. We find no evidence for line emission at the position of the z = 0.376 $\textrm {H}\scriptstyle \mathrm{I}$ line reported from the CHILES survey at a $\gt $94 per cent confidence level, placing a 3$\sigma$ upper limit of 8.1 $\times$ 10$^{9}$ M$_{\odot }$ on $M_{\mathrm{HI}}$ for this galaxy. A public data release accompanies this article.

Funder

National Science Foundation

National Aeronautics and Space Administration

NASA

Science and Technology Facilities Council

UKRI

European Research Council

National Research Foundation

NRF

Australian Research Council

Publisher

Oxford University Press (OUP)