The small isolated gas-rich irregular dwarf (SIGRID) galaxy sample: Description and first results

David C. Nicholls; Michael A. Dopita; Helmut Jerjen; Gerhardt R. Meurer

doi:10.1088/0004-6256/142/3/83

The small isolated gas-rich irregular dwarf (SIGRID) galaxy sample: Description and first results

David C. Nicholls^*, Michael A. Dopita, Helmut Jerjen, Gerhardt R. Meurer

^*Corresponding author for this work

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

13 Citations (Scopus)

Abstract

Using an optically unbiased selection process based on the HIPASS neutral hydrogen survey, we have selected a sample of 83 spatially isolated, gas-rich dwarf galaxies in the southern hemisphere with cz between 350 and 1650kms ^-1, and with R-band luminosities and H I masses less than that of the Small Magellanic Cloud. The sample is an important population of dwarf galaxies in the local universe, all with ongoing star formation, and most of which have no existing spectroscopic data. We are measuring the chemical abundances of these galaxies, using the integral-field spectrograph on the Australian National University 2.3m telescope, the Wide-Field Spectrograph. This paper describes our survey criteria and procedures, lists the survey sample, and reports on initial observations.

Original language	English
Article number	83
Journal	Astronomical Journal
Volume	142
Issue number	3
DOIs	https://doi.org/10.1088/0004-6256/142/3/83
Publication status	Published - Sept 2011

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10.1088/0004-6256/142/3/83

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title = "The small isolated gas-rich irregular dwarf (SIGRID) galaxy sample: Description and first results",

abstract = "Using an optically unbiased selection process based on the HIPASS neutral hydrogen survey, we have selected a sample of 83 spatially isolated, gas-rich dwarf galaxies in the southern hemisphere with cz between 350 and 1650kms -1, and with R-band luminosities and H I masses less than that of the Small Magellanic Cloud. The sample is an important population of dwarf galaxies in the local universe, all with ongoing star formation, and most of which have no existing spectroscopic data. We are measuring the chemical abundances of these galaxies, using the integral-field spectrograph on the Australian National University 2.3m telescope, the Wide-Field Spectrograph. This paper describes our survey criteria and procedures, lists the survey sample, and reports on initial observations.",

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T1 - The small isolated gas-rich irregular dwarf (SIGRID) galaxy sample

T2 - Description and first results

AU - Nicholls, David C.

AU - Dopita, Michael A.

AU - Jerjen, Helmut

AU - Meurer, Gerhardt R.

PY - 2011/9

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N2 - Using an optically unbiased selection process based on the HIPASS neutral hydrogen survey, we have selected a sample of 83 spatially isolated, gas-rich dwarf galaxies in the southern hemisphere with cz between 350 and 1650kms -1, and with R-band luminosities and H I masses less than that of the Small Magellanic Cloud. The sample is an important population of dwarf galaxies in the local universe, all with ongoing star formation, and most of which have no existing spectroscopic data. We are measuring the chemical abundances of these galaxies, using the integral-field spectrograph on the Australian National University 2.3m telescope, the Wide-Field Spectrograph. This paper describes our survey criteria and procedures, lists the survey sample, and reports on initial observations.

AB - Using an optically unbiased selection process based on the HIPASS neutral hydrogen survey, we have selected a sample of 83 spatially isolated, gas-rich dwarf galaxies in the southern hemisphere with cz between 350 and 1650kms -1, and with R-band luminosities and H I masses less than that of the Small Magellanic Cloud. The sample is an important population of dwarf galaxies in the local universe, all with ongoing star formation, and most of which have no existing spectroscopic data. We are measuring the chemical abundances of these galaxies, using the integral-field spectrograph on the Australian National University 2.3m telescope, the Wide-Field Spectrograph. This paper describes our survey criteria and procedures, lists the survey sample, and reports on initial observations.

KW - Hii regions

KW - ISM: abundances

KW - galaxies: dwarf

KW - galaxies: irregular

KW - galaxies: statistics

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U2 - 10.1088/0004-6256/142/3/83

DO - 10.1088/0004-6256/142/3/83

M3 - Article

SN - 0004-6256

VL - 142

JO - Astronomical Journal

JF - Astronomical Journal

IS - 3

M1 - 83

ER -

The small isolated gas-rich irregular dwarf (SIGRID) galaxy sample: Description and first results

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