Observations of supershells in the interstellar medium of nearby galaxies

Elias Brinks; Ioannis Bagetakos; Fabian Walter; Erwin De Blok

doi:10.1017/S1743921307001251

Observations of supershells in the interstellar medium of nearby galaxies

Elias Brinks^*, Ioannis Bagetakos, Fabian Walter, Erwin De Blok

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

HI observations at sufficiently high spatial and velocity resolution have revealed a wealth of structures such as shells and bubbles in the ISM of latetype galaxies. These structures are filled with metalenriched, coronal gas from SNe which, through overpressure, powers their expansion. Material swept up by these expanding shells can go critical and form subsequent (secondary or propagating) star formation. Shells that grow larger than the thickness of the gas layer will blow out of the disk, spilling enriched material into the halo (or in the case of violent starbursts, the Intergalactic Medium). We review what has been achieved to date and present some first results of a major project based on THINGS (The HI Nearby Galaxy Survey), which aims to extend studies of the ISM in galaxies to 34 nearby systems (<10 Mpc), all observed to the same exacting standards (resolution 6 5 km s¹, or better; typical detection threshold of ~5 10¹⁹ atom cm²).

Original language	English
Pages (from-to)	76-83
Number of pages	8
Journal	Proceedings of the International Astronomical Union
Volume	2
Issue number	S237
DOIs	https://doi.org/10.1017/S1743921307001251
Publication status	Published - Aug 2006

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title = "Observations of supershells in the interstellar medium of nearby galaxies",

abstract = "HI observations at sufficiently high spatial and velocity resolution have revealed a wealth of structures such as shells and bubbles in the ISM of latetype galaxies. These structures are filled with metalenriched, coronal gas from SNe which, through overpressure, powers their expansion. Material swept up by these expanding shells can go critical and form subsequent (secondary or propagating) star formation. Shells that grow larger than the thickness of the gas layer will blow out of the disk, spilling enriched material into the halo (or in the case of violent starbursts, the Intergalactic Medium). We review what has been achieved to date and present some first results of a major project based on THINGS (The HI Nearby Galaxy Survey), which aims to extend studies of the ISM in galaxies to 34 nearby systems (<10 Mpc), all observed to the same exacting standards (resolution 6 5 km s1, or better; typical detection threshold of ~5 1019 atom cm2).",

keywords = "Galaxies: ISM, ISM: bubbles, ISM: structure, Radio lines: ISM",

author = "Elias Brinks and Ioannis Bagetakos and Fabian Walter and {De Blok}, Erwin",

year = "2006",

month = aug,

doi = "10.1017/S1743921307001251",

language = "English",

volume = "2",

pages = "76--83",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S237",

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TY - JOUR

T1 - Observations of supershells in the interstellar medium of nearby galaxies

AU - Brinks, Elias

AU - Bagetakos, Ioannis

AU - Walter, Fabian

AU - De Blok, Erwin

PY - 2006/8

Y1 - 2006/8

N2 - HI observations at sufficiently high spatial and velocity resolution have revealed a wealth of structures such as shells and bubbles in the ISM of latetype galaxies. These structures are filled with metalenriched, coronal gas from SNe which, through overpressure, powers their expansion. Material swept up by these expanding shells can go critical and form subsequent (secondary or propagating) star formation. Shells that grow larger than the thickness of the gas layer will blow out of the disk, spilling enriched material into the halo (or in the case of violent starbursts, the Intergalactic Medium). We review what has been achieved to date and present some first results of a major project based on THINGS (The HI Nearby Galaxy Survey), which aims to extend studies of the ISM in galaxies to 34 nearby systems (<10 Mpc), all observed to the same exacting standards (resolution 6 5 km s1, or better; typical detection threshold of ~5 1019 atom cm2).

AB - HI observations at sufficiently high spatial and velocity resolution have revealed a wealth of structures such as shells and bubbles in the ISM of latetype galaxies. These structures are filled with metalenriched, coronal gas from SNe which, through overpressure, powers their expansion. Material swept up by these expanding shells can go critical and form subsequent (secondary or propagating) star formation. Shells that grow larger than the thickness of the gas layer will blow out of the disk, spilling enriched material into the halo (or in the case of violent starbursts, the Intergalactic Medium). We review what has been achieved to date and present some first results of a major project based on THINGS (The HI Nearby Galaxy Survey), which aims to extend studies of the ISM in galaxies to 34 nearby systems (<10 Mpc), all observed to the same exacting standards (resolution 6 5 km s1, or better; typical detection threshold of ~5 1019 atom cm2).

KW - Galaxies: ISM

KW - ISM: bubbles

KW - ISM: structure

KW - Radio lines: ISM

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U2 - 10.1017/S1743921307001251

DO - 10.1017/S1743921307001251

M3 - Article

AN - SCOPUS:37049008288

SN - 1743-9213

VL - 2

SP - 76

EP - 83

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S237

ER -

Observations of supershells in the interstellar medium of nearby galaxies

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