SKA Science Data Challenge 2: analysis and results
Artikel i vetenskaplig tidskrift, 2023
The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application of advanced analysis techniques to extract key science findings. To this end, SKAO is conducting a series of Science Data Challenges, each designed to familiarize the scientific community with SKAO data and to drive the development of new analysis techniques. We present the results from Science Data Challenge 2 (SDC2), which invited participants to find and characterize 233 245 neutral hydrogen (H i) sources in a simulated data product representing a 2000 h SKA-Mid spectral line observation from redshifts 0.25-0.5. Through the generous support of eight international supercomputing facilities, participants were able to undertake the Challenge using dedicated computational resources. Alongside the main challenge, 'reproducibility awards' were made in recognition of those pipelines which demonstrated Open Science best practice. The Challenge saw over 100 participants develop a range of new and existing techniques, with results that highlight the strengths of multidisciplinary and collaborative effort. The winning strategy - which combined predictions from two independent machine learning techniques to yield a 20 per cent improvement in overall performance - underscores one of the main Challenge outcomes: that of method complementarity. It is likely that the combination of methods in a so-called ensemble approach will be key to exploiting very large astronomical data sets.
galaxies: statistics
techniques: imaging spectroscopy
radio lines: galaxies
methods: data analysis
surveys
software: simulations
Författare
Philippa Hartley
SKA Organisation
A. Bonaldi
SKA Organisation
University of Manchester
Robert Braun
SKA Organisation
J. N.H.S. Aditya
Shanghai Astronomical Observatory
S. Aicardi
Observatoire de Paris
L. Alegre
SKA Organisation
University of Edinburgh
A. Chakraborty
Indian Institute of Technology Indore
X. Chen
Chinese Academy of Sciences
S. Choudhuri
IIT Madras
Queen Mary University of London
A. O. Clarke
SKA Organisation
J. Coles
University of Cambridge
J. S. Collinson
SKA Organisation
D. Cornu
Observatoire de Paris
L. Darriba
Instituto de Astrofisica de Andalucía (IAA)
M. Delli Veneri
Universita degli Studi di Napoli Federico II
J. Forbrich
University of Hertfordshire
B. Fraga
Centro Brasileiro de Pesquisas Fisicas
A. Galan
Ecole Polytechnique Federale de Lausanne (EPFL)
J. Garrido
Instituto de Astrofisica de Andalucía (IAA)
F. Gubanov
Moscow State University
Henrik Håkansson
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik
M. J. Hardcastle
University of Hertfordshire
C. Heneka
Universität Hamburg
D. Herranz
CSIC-UC - Instituto de Física de Cantabria (IFCA)
K. M. Hess
Rijksuniversiteit Groningen
Netherlands Institute for Radio Astronomy (ASTRON)
Instituto de Astrofisica de Andalucía (IAA)
M. Jagannath
PES University
Sumit Jaiswal
Shanghai Astronomical Observatory
R. J. Jurek
University of Queensland
D. Korber
Ecole Polytechnique Federale de Lausanne (EPFL)
S. Kitaeff
University of Western Australia
D. Kleiner
Istituto nazionale di astrofisica (INAF)
B. Q. Lao
Shanghai Astronomical Observatory
X. Lu
Observatoire de Paris
A. Mazumder
Indian Institute of Technology Indore
J. Moldon
Instituto de Astrofisica de Andalucía (IAA)
R. Mondal
Tel Aviv University
S. Ni
College of Sciences, Northeastern University
Magnus Önnheim
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik
M. Parra
Instituto de Astrofisica de Andalucía (IAA)
N. Patra
Indian Institute of Technology Indore
Raman Research Institute
A. Peel
Ecole Polytechnique Federale de Lausanne (EPFL)
P. Salomé
Observatoire de Paris
S. Sánchez-Expósito
Instituto de Astrofisica de Andalucía (IAA)
M. Sargent
University of Sussex
Ecole Polytechnique Federale de Lausanne (EPFL)
International Space Science Institute
B. Semelin
Observatoire de Paris
P. Serra
Istituto nazionale di astrofisica (INAF)
A. K. Shaw
Indian Institute of Technology Kharagpur
A. X. Shen
Australian SKA Regional Centre (AusSRC)
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
Anders Sjöberg
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik
L. Smith
University of Cambridge
A. Soroka
Moscow State University
V. Stolyarov
Russian Academy of Sciences
University of Cambridge
E. Tolley
Ecole Polytechnique Federale de Lausanne (EPFL)
Maria Carmen Toribio Perez
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
J. M. van der Hulst
Rijksuniversiteit Groningen
A. Vafaei Sadr
Université de Genève
L. Verdes-Montenegro
Instituto de Astrofisica de Andalucía (IAA)
T. Westmeier
University of Western Australia
K. Yu
Chinese Academy of Sciences
L. Yu
Chinese Academy of Sciences
L. Zhang
Peng Cheng Laboratory
Sun Yat-Sen University
X. Zhang
College of Sciences, Northeastern University
Y. Zhang
Shanghai Astronomical Observatory
Antxon Alberdi
Instituto de Astrofisica de Andalucía (IAA)
M. Ashdown
University of Cambridge
C. R. Bom
Centro Brasileiro de Pesquisas Fisicas
M. Brüggen
Universität Hamburg
J. Cannon
Macalester College
R. Chen
Chinese Academy of Sciences
Françoise Combes
Collège de France
Observatoire de Paris
John Conway
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
Frédéric Courbin
Ecole Polytechnique Federale de Lausanne (EPFL)
J. Ding
Sun Yat-Sen University
G. Fourestey
Ecole Polytechnique Federale de Lausanne (EPFL)
J. Freundlich
Observatoire Astronomique de Strasbourg
L. Gao
College of Sciences, Northeastern University
C. Gheller
Istituto nazionale di astrofisica (INAF)
Q. Guo
Chinese Academy of Sciences
Emil Gustavsson
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik
Mats Jirstrand
Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik
M. G. Jones
University of Arizona
G. I.G. Józsa
South African Radio Astronomy Observatory (SARAO)
Peter Kamphuis
Ruhr-Universität Bochum
J.P.J.P. Kneib
Ecole Polytechnique Federale de Lausanne (EPFL)
Michael Lindqvist
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
B. Liu
Chinese Academy of Sciences
Y. Liu
Chinese Academy of Sciences
Y. Mao
Tsinghua University
Antoine Marchal
Institut canadien d'astrophysique théorique
I. Márquez
Instituto de Astrofisica de Andalucía (IAA)
A. Meshcheryakov
Russian Academy of Sciences
Michael Olberg
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
N. Oozeer
South African Radio Astronomy Observatory (SARAO)
M. Pandey-Pommier
Laboratoire Univers et Particules de Montpellier
W. Pei
Chinese Academy of Sciences
B. Peng
Chinese Academy of Sciences
J. Sabater
University of Edinburgh
A. Sorgho
Instituto de Astrofisica de Andalucía (IAA)
J. L. Starck
Ecole Polytechnique Federale de Lausanne (EPFL)
C. Tasse
Centre national de la recherche scientifique (CNRS)
Rhodes University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 523 2 1967-1993Onsala rymdobservatorium infrastruktur
Vetenskapsrådet (VR) (2017-00648), 2018-01-01 -- 2021-12-31.
Ämneskategorier
Astronomi, astrofysik och kosmologi
Datavetenskap (datalogi)
DOI
10.1093/mnras/stad1375