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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The HASHTAG Project: The First Submillimeter Images of the Andromeda Galaxy from the Ground
Astrophysical Journal, Supplement Series, Volume 257, No. 2, Article 52, Year 2021
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Description
Observing nearby galaxies with submillimeter telescopes on the ground has two major challenges. First, the brightness is significantly reduced at long submillimeter wavelengths compared to the brightness at the peak of the dust emission. Second, it is necessary to use a high-pass spatial filter to remove atmospheric noise on large angular scales, which has the unwelcome side effect of also removing the galaxy's large-scale structure. We have developed a technique for producing high-resolution submillimeter images of galaxies of large angular size by using the telescope on the ground to determine the small-scale structure (the large Fourier components) and a space telescope (Herschel or Planck) to determine the large-scale structure (the small Fourier components). Using this technique, we are carrying out the HARP and SCUBA-2 High Resolution Terahertz Andromeda Galaxy Survey (HASHTAG), an international Large Program on the James Clerk Maxwell Telescope, with one aim being to produce the first high-fidelity high-resolution submillimeter images of Andromeda. In this paper, we describe the survey, the method we have developed for combining the space-based and ground-based data, and we present the first HASHTAG images of Andromeda at 450 and 850 μm. We also have created a method to predict the CO(J = 3-2) line flux across M31, which contaminates the 850 μm band. We find that while normally the contamination is below our sensitivity limit, it can be significant (up to 28%) in a few of the brightest regions of the 10 kpc ring. We therefore also provide images with the predicted line emission removed. © 2021. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Smith, Matthew W.L.
United Kingdom, Cardiff
Cardiff University
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Williams, Thomas G.
Germany, Heidelberg
Max Planck Institute for Astronomy
Lee, Bumhyun
China, Beijing
Peking University
South Korea, Seoul
Yonsei University
Barmby, Pauline
Canada, London
Western University
Bureau, Martin
United Kingdom, Oxford
University of Oxford
Chapman, Scott C.
Canada, Halifax
Dalhousie University
Chung, Aeree
South Korea, Seoul
Yonsei University
Chung, Eun Jung
South Korea, Daejeon
Chungnam National University
Clark, Christopher J.R.
United States, Baltimore
Space Telescope Science Institute
Clements, David L.
United Kingdom, London
Imperial College London
Davis, Timothy A.
United Kingdom, Cardiff
Cardiff University
de Looze, Ilse
Belgium, Ghent
Universiteit Gent
United Kingdom, London
University College London
Eden, David J.
United Kingdom, Liverpool
Liverpool John Moores University
Ford, George P.
United Kingdom, Cardiff
Cardiff University
Gao, Yu
China, Xiamen
Xiamen University
China, Beijing
Chinese Academy of Sciences
Gear, Walter K.P.
Ireland, Galway
University of Galway
Gomez, Haley L.
United Kingdom, Cardiff
Cardiff University
de Grijs, Richard
Australia, Sydney
Macquarie University
He, Jinhua
China, Beijing
Chinese Academy of Sciences
Chile, Santiago
Universidad de Chile
Ho, Luis C.
China, Beijing
Peking University
Hughes, Thomas M.
China, Beijing
Chinese Academy of Sciences
Chile, Valparaiso
Universidad de Valparaiso
China, Hefei
University of Science and Technology of China
Jiao, Sihan
China, Beijing
Chinese Academy of Sciences
China, Beijing
University of Chinese Academy of Sciences
Li, Zhiyuan
China, Nanjing
Nanjing University
Kemper, F.
Germany, Garching Bei Munchen
European Southern Observatory
Taiwan, Nankang
Academia Sinica Taiwan
Kirchschlager, Florian
United Kingdom, London
University College London
Koch, Eric W.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Kong, Albert K.H.
Taiwan, Hsinchu
National Tsing Hua University
Lee, Chienhsiu Hsiu
Unknown Affiliation
Mairs, Steve
United States, Hilo
East Asian Observatory
Michałowski, Michał J.
Poland, Poznan
Uniwersytet Im. Adama Mickiewicza w Poznaniu
Pattle, Kate M.
Ireland, Galway
University of Galway
Peng, Yingjie
China, Beijing
Peking University
Rawlings, Mark G.
United States, Hilo
East Asian Observatory
Rigopoulou, Dimitra
United Kingdom, Oxford
University of Oxford
Saintonge, Amélie
United Kingdom, London
University College London
Schruba, Andreas
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Tang, Xindi
China, Beijing
Chinese Academy of Sciences
Whitworth, Anthony Peter
United Kingdom, Cardiff
Cardiff University
Wilson, Christine D.
Canada, Hamilton
Mcmaster University
Zhu, Ming
China, Beijing
Chinese Academy of Sciences
Statistics
Citations: 3
Authors: 41
Affiliations: 31
Identifiers
Doi:
10.3847/1538-4365/ac23d0
ISSN:
00670049
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative