Dark mammoth trunks in the merging galaxy NGC 1316 and a mechanism of cosmic double helices
2010 (English)In: Astrophysics and Space Science, ISSN 0004-640X, E-ISSN 1572-946X, Vol. 327, no 2, 267-278 p.Article in journal (Refereed) Published
NGC 1316 is a giant, elliptical galaxy containing a complex network of dark, dust features. The morphology of these features has been examined in some detail using a Hubble Space Telescope, Advanced Camera for Surveys image. It is found that most of the features are constituted of long filaments. There also exist a great number of dark structures protruding inwards from the filaments. Many of these structures are strikingly similar to elephant trunks in H ii regions in the Milky Way Galaxy, although much larger. The structures, termed mammoth trunks, generally are filamentary and often have shapes resembling the letters V or Y. In some of the mammoth trunks the stem of the Y can be resolved into two or more filaments, many of which showing signs of being intertwined. A model of the mammoth trunks, related to a recent theory of elephant trunks, is proposed. Based on magnetized filaments, the model is capable of giving an account of the various shapes of the mammoth trunks observed, including the twined structures.
Place, publisher, year, edition, pages
2010. Vol. 327, no 2, 267-278 p.
Molecular clouds, Magnetic fields, H II regions, Elephant trunks, Double helix, NGC 1316
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-28238DOI: 10.1007/s10509-010-0345-7ISI: 000277165200011ScopusID: 2-s2.0-77951978886OAI: oai:DiVA.org:kth-28238DiVA: diva2:389200
QC 201101192011-01-192011-01-122011-01-19Bibliographically approved