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Fine-scale structure of the neutral ISM in M81

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dc.contributor.authorBagetakos, Ioannis
dc.contributor.authorBrinks, Elias
dc.contributor.authorWalter, Fabian
dc.contributor.authorde Blok, Willem
dc.coverage.spatialPrague Czech Republic
dc.date.accessioned2015-12-07T22:25:24Z
dc.date.createdAugust 14-18 2006
dc.date.issued2007
dc.date.updated2015-12-07T09:36:01Z
dc.description.abstractWe present an analysis of the finescale structure of the neutral ISM as traced via the 21-cm line of atomic hydrogen (HI) in the nearby galaxy M 81. The data show a stunning amount of detail in the form of 330 expanding shells and holes in the neutral ISM of M 81. A comparison with similar structures found in two other spirals and two dwarf galaxies (M 31, M 33, IC 2574 and Holmberg II) reveals that the ISM in M 81 shares a lot of similarities with the two spirals, whereas the structure of its ISM is different to that in dwarf galaxies. The sizes of the HI holes in M 81 range from 80 pc (close to the resolution limit) to 600 pc; the expansion velocities can reach 20 km s1; estimated ages are 2.5 to 35 Myrs and the energies involved range from 1050 to 3.5 x 1052 ergs. The amount of neutral gas involved is of order 104 to 106 solar masses.
dc.identifier.isbn0521863465
dc.identifier.urihttp://hdl.handle.net/1885/21272
dc.publisherCambridge University Press
dc.relation.ispartofseriesInternational Astronomical Union Symposium 237
dc.sourceTriggered Star Formation in a Turbulent ISM
dc.source.urihttp://astro.cas.cz/iaus237/
dc.subjectKeywords: Galaxies: individual (M 81); Galaxies: ISM; ISM: structure; Radio lines: ISM
dc.titleFine-scale structure of the neutral ISM in M81
dc.typeConference paper
local.bibliographicCitation.lastpage394
local.bibliographicCitation.startpage394
local.contributor.affiliationBagetakos, Ioannis, University of Hertfordshire
local.contributor.affiliationBrinks, Elias, University of Hertfordshire
local.contributor.affiliationWalter, Fabian, Max Planck Institute for Astronomy
local.contributor.affiliationde Blok, Willem, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidde Blok, Willem, u4191932
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationu4193696xPUB16
local.identifier.doi10.1017/S1743921307001822
local.identifier.scopusID2-s2.0-37049036895
local.type.statusPublished Version

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