GMRT H<scp> i</scp> mapping of mid-infrared bright blue compact dwarf galaxies W1016+3754 and W2326+0608-Reference-Cited by-同舟云学术

GMRT H i mapping of mid-infrared bright blue compact dwarf galaxies W1016+3754 and W2326+0608

Published:2023-06-01 Issue:3 Volume:523 Page:3848-3862
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Chandola Y¹²³^ORCID,Tsai C W³⁴⁵,Li D³⁶⁷^ORCID,Sengupta C¹^ORCID,Ma Y Z¹⁸⁹¹⁰^ORCID,Zuo P³¹¹¹²

Affiliation:

1. Purple Mountain Observatory, Chinese Academy of Sciences (CAS) , 10, Yuan Hua Road, Qixia District, Nanjing 210023, China

2. Inter-University Centre for Astronomy and Astrophysics (IUCAA) , Post bag 4, Ganeshkhind, Pune 411007, India

3. National Astronomical Observatories , CAS, 20A, Datun Road, Chaoyang District, Beijing, 100101, China

4. Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing, 102206, China

5. University of Chinese Academy of Sciences , Beijing, 100049, China

6. Research Center for Intelligent Computing Platforms, Zhejiang Laboratory , Hangzhou, 311100, China

7. NAOC-UKZN Computational Astrophysics Centre (NUCAC), University of KwaZulu-Natal , Durban, 4000, South Africa

8. Department of Physics, Stellenbosch University, Matieland, 7602, South Africa

9. School of Chemistry and Physics, University of KwaZulu-Natal , Westville Campus, Durban, 4000, South Africa

10. National Institute for Theoretical and Computational Sciences (NITheCS) , Matieland, 7602, South Africa

11. Kavli Institute for Astronomy and Astrophysics, Peking University , 5 Yiheyuan Road, Beijing, 100871, China

12. International Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Highway, Crawley, WA 6009, Australia

Abstract

ABSTRACT We present the results from deep 21 cm H i mapping of two nearby Blue Compact Dwarf Galaxies (BCDGs), W1016+3754 and W2326+0608, using the Giant Metrewave Radio Telescope (GMRT). These BCDGs are bright in mid-infrared data and undergoing active star formation. With the GMRT observations, we investigate the role of cold neutral gas as the fuel resource of the current intensive star formation activity. Star formation in these galaxies is likely to be due to the infall of H i gas triggered by gravitational perturbation from nearby galaxies. The BCDG W2326+0608 and nearby galaxy SDSS J232603.86+060835.8 share a common H i envelope. We find star formation takes place in the high H i column density gas (≳1021 cm−2) regions for both BCDGs. The recent starburst and infall of metal-free gas have kept the metallicity low for the BCDG W1016+3754. The metallicity for W2326+0608 is higher, possibly due to tidal interaction with the nearby galaxy SDSS J232603.86+060835.8.

Funder

National Science Foundation

National Natural Science Foundation of China

Chinese Academy of Sciences

MOST

National Research Foundation

Alfred P. Sloan Foundation

NASA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics