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Multiwavelength study of the radio emission from a tight galaxy pair Arp 143

Multiwavelength study of the radio emission from a ...

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dc.contributor.author Nikiel-Wroczyński, Błażej [SAP14004023] pl
dc.contributor.author Jamrozy, Marek [SAP11016371] pl
dc.contributor.author Soida, Marian [SAP11014010] pl
dc.contributor.author Urbanik, Marek [SAP11005004] pl
dc.date.accessioned 2015-03-13T10:41:31Z
dc.date.available 2015-03-13T10:41:31Z
dc.date.issued 2014 pl
dc.identifier.issn 0035-8711 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/3797
dc.language eng pl
dc.title Multiwavelength study of the radio emission from a tight galaxy pair Arp 143 pl
dc.type JournalArticle pl
dc.description.physical 1729-1737 pl
dc.abstract.en We present results of the recent low-frequency radio observations of a tight galaxy pair Arp 143 at 234 and 612 MHz. These data are analysed together with the archive data at 1490, 4860, 8440, and 14940 MHz. From the analysis of the radio emission we derive constraints on the age of the radio emitting structures as well as on the properties of their magnetic field. We show that the collisional ring of NGC 2445 hosts strong magnetic fields (reaching 12 μG in its northwestern part) manifesting as a steep-spectrum, non-thermal radiation at radio frequencies. The spectral age of this structure is higher than estimates derived for the star-forming regions from the Hα distribution, suggesting that the radio emission might have a different origin. The galactic core is of a very young spectral age, suggesting an ongoing starburst activity. Additionally, we identify a possible ridge of emission between the ring galaxy and its elliptical companion NGC 2444. pl
dc.subject.en magnetic fields pl
dc.subject.en galaxies: groups: individual: Arp 143 pl
dc.subject.en galaxies: individual: NGC 2445 pl
dc.subject.en galaxies: interactions pl
dc.subject.en intergalactic medium pl
dc.subject.en radio continuum: galaxies pl
dc.description.volume 444 pl
dc.description.number 2 pl
dc.identifier.doi 10.1093/mnras/stu1475 pl
dc.identifier.eissn 1365-2966 pl
dc.title.journal Monthly Notices of the Royal Astronomical Society pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.rights.original OTHER; inne; ostateczna wersja wydawcy; po opublikowaniu; 36; pl
.pointsMNiSW [2014 A]: 35


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