Exploring the properties of low-frequency radio emission and magnetic fields in a sample of compact galaxy groups using the LOFAR Two-Metre Sky Survey (LoTSS)

被引：8

作者：

Nikiel-Wroczynski, B. ^{[1
]}

Berger, A. ^{[2
]}

Ruiz, N. Herrera ^{[2
]}

Bomans, D. J. ^{[2
]}

Blex, S. ^{[2
]}

Horellou, C. ^{[3
]}

Paladino, R. ^{[4
]}

Becker, A. ^{[2
]}

Miskolczi, A. ^{[2
]}

Beck, R. ^{[5
]}

Chyzy, K. ^{[1
]}

Dettmar, R. -J. ^{[2
]}

Heald, G. ^{[6
]}

Heesen, V. ^{[7
]}

Jamrozy, M. ^{[1
]}

Shimwell, T. W. ^{[8
]}

Tasse, C. ^{[9
]}

机构：

[1] Jagiellonian Univ, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland

[2] Ruhr Univ Bochum, Astron Inst, Fak Phys & Astron, D-44780 Bochum, Germany

[3] Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, S-43992 Onsala, Sweden

[4] INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy

[5] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[6] CSIRO Astron & Space Sci, POB 1130, Bentley, WA 6102, Australia

[7] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

[8] Netherlands Inst Radio Astron, ASTRON, Postbus 2, NL-7990 AA Dwingeloo, Netherlands

[9] Univ Paris Diderot, CNRS, Observ Paris, GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France

来源：

ASTRONOMY & ASTROPHYSICS | 2019年 / 622卷

关键词：

radio continuum: galaxies; galaxies: groups: general; galaxies: magnetic fields; magnetic fields; STAR-FORMATION; EVOLUTION; IMAGES;

D O I：

10.1051/0004-6361/201833934

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use the LOFAR Two-metre Sky Survey (LoTSS) Data Release I to identify the groups of galaxies (and individual galaxies) from the Hickson compact groups (HCG) and magnitude-limited compact groups (MLCG) samples that emit at the frequency of 150 MHz, characterise their radio emission (extended or limited to the galaxies), and compare new results to earlier observations and theoretical predictions. The detection of 73 systems (and 7 more - probably) out of 120, of which as many as 17 show the presence of extended radio structures, confirms the previous hypothesis of the common character of the magnetic field inside galaxy groups and its detectability. In order to investigate the future potential of low-frequency radio studies of galaxy groups, we also present a more detailed insight into four radio-emitting systems, for which the strength of the magnetic field inside their intergalactic medium (IGM) is calculated. The estimated values are comparable to that found inside star-forming galaxies, suggesting a dynamical and evolutionary importance of the magnetic field in galaxy groups.

引用

页数：14

共 53 条

[1]

Abell G. O., 1958, ASTROPHYS J S, V3, P211

[2] The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment [J].

Abolfathi, Bela ;

Aguado, D. S. ;

Aguilar, Gabriela ;

Prieto, Carlos Allende ;

Almeida, Andres ;

Ananna, Tonima Tasnim ;

Anders, Friedrich ;

Anderson, Scott F. ;

Andrews, Brett H. ;

Anguiano, Borja ;

Aragon-Salamanca, Alfonso ;

Argudo-Fernandez, Maria ;

Armengaud, Eric ;

Ata, Metin ;

Aubourg, Eric ;

Avila-Reese, Vladimir ;

Badenes, Carles ;

Bailey, Stephen ;

Balland, Christophe ;

Barger, Kathleen A. ;

Barrera-Ballesteros, Jorge ;

Bartosz, Curtis ;

Bastien, Fabienne ;

Bates, Dominic ;

Baumgarten, Falk ;

Bautista, Julian ;

Beaton, Rachael ;

Beers, Timothy C. ;

Belfiore, Francesco ;

Bender, Chad F. ;

Bernardi, Mariangela ;

Bershady, Matthew A. ;

Beutler, Florian ;

Bird, Jonathan C. ;

Bizyaev, Dmitry ;

Blanc, Guillermo A. ;

Blanton, Michael R. ;

Blomqvist, Michael ;

Bolton, Adam S. ;

Boquien, Mederic ;

Borissova, Jura ;

Bovy, Jo ;

Diaz, Christian Andres Bradna ;

Brandt, William Nielsen ;

Brinkmann, Jonathan ;

Brownstein, Joel R. ;

Bundy, Kevin ;

Burgasser, Adam J. ;

Burtin, Etienne ;

Busca, Nicolas G. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2018, 235 (02)

[3]

Arp H., 1972, ASTROPHYS J, V174, P111

[4] Revised equipartition and minimum energy formula for magnetic field strength estimates from radio synchrotron observations [J].

Beck, R ;

Krause, M .

ASTRONOMISCHE NACHRICHTEN, 2005, 326 (06) :414-427

[5] THE FIRST SURVEY - FAINT IMAGES OF THE RADIO SKY AT 20 CENTIMETERS [J].

BECKER, RH ;

WHITE, RL ;

HELFAND, DJ .

ASTROPHYSICAL JOURNAL, 1995, 450 (02) :559-577

[6]

Berger A., 2016, THESIS

[7] LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group [J].

Clarke, A. O. ;

Heald, G. ;

Jarrett, T. ;

Bray, J. D. ;

Hardcastle, M. J. ;

Cantwell, T. M. ;

Scaife, A. M. M. ;

Brienza, M. ;

Bonafede, A. ;

Breton, R. P. ;

Broderick, W. ;

Carbone, D. ;

Croston, J. H. ;

Farnes, J. S. ;

Harwood, J. J. ;

Heesen, V. ;

Horneffer, A. ;

van der Horst, A. J. ;

Iacobelli, M. ;

Jurusik, W. ;

Kokotanekov, G. ;

McKean, J. P. ;

Morabito, L. K. ;

Mulcahy, D. D. ;

Nikiel-Wroczynski, B. S. ;

Orru, E. ;

Paladino, R. ;

Pandey-Pommier, M. ;

Pietka, M. ;

Pizzo, R. ;

Pratley, L. ;

Riseley, C. J. ;

Rottgering, H. J. A. ;

Rowlinson, A. ;

Sabater, J. ;

Sendlinger, K. ;

Shulevski, A. ;

Sridhar, S. S. ;

Stewart, A. J. ;

Tasse, C. ;

van Velzen, S. ;

van Weeren, R. J. ;

Wise, M. W. .

ASTRONOMY & ASTROPHYSICS, 2017, 601

[8] THE TAFFY GALAXIES UGC-12914/5 [J].

CONDON, JJ ;

HELOU, G ;

SANDERS, DB ;

SOIFER, BT .

ASTRONOMICAL JOURNAL, 1993, 105 (05) :1730-1736

[9] The NRAO VLA Sky Survey [J].

Condon, JJ ;

Cotton, WD ;

Greisen, EW ;

Yin, QF ;

Perley, RA ;

Taylor, GB ;

Broderick, JJ .

ASTRONOMICAL JOURNAL, 1998, 115 (05) :1693-1716

[10] A second "taffy" galaxy pair [J].

Condon, JJ ;

Helou, G ;

Jarrett, TH .

ASTRONOMICAL JOURNAL, 2002, 123 (04) :1881-1891

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