Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies

H. Lee; E. D. Skillman; J. M. Cannon; D. C. Jackson; R. D. Gehrz; E. Polomski; C. E. Woodward

doi:10.1007/978-3-540-71173-5_30

Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies

H. Lee, E. D. Skillman, J. M. Cannon, D. C. Jackson, R. D. Gehrz, E. Polomski, C. E. Woodward

Physics and Astronomy (Twin Cities)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

For a sample of 25 dwarf irregular galaxies with distances D ≲ 5 Mpc and measured oxygen abundances, we present results derived from galaxy luminosities at 4.5 μm and stellar masses from near-infrared imaging with IRAC on the Spitzer Space Telescope. We have constructed the appropriate luminosity-metallicity (L-Z) and mass-metallicity (M-Z) relations, and compared these relations with their corresponding relations from the Sloan Digital Sky Survey (SDSS). We obtain the following results. 1. The dispersion in the near-infrared L-Z relation is reduced with respect to the dispersion in the optical L-Z relation, which agrees with expectations for reduced variations of stellar mass-to-light ratios at longer wavelengths compared to optical wavelengths. 2. The dispersion in the optical L-Z relation is similar over approximately 11 mag in optical luminosity. 3. With our constructed M-Z relation, we have extended the SDSS M-Z relation to lower masses by about 2.5 dex in stellar mass. 4. The dispersion in the M-Z relation appears to be comparable over a range of 5.5 dex in stellar mass.

Original language	English (US)
Title of host publication	Groups of Galaxies in the Nearby Universe
Subtitle of host publication	Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005
Editors	Ivo Saviane, Valentin Ivanov, Jordanka Borissova
Pages	181-185
Number of pages	5
DOIs	https://doi.org/10.1007/978-3-540-71173-5_30
State	Published - 2007

Publication series

Name	ESO Astrophysics Symposia
Volume	2007
ISSN (Print)	1431-2433
ISSN (Electronic)	1611-6143

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Lee, H., Skillman, E. D., Cannon, J. M., Jackson, D. C., Gehrz, R. D., Polomski, E., & Woodward, C. E. (2007). Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies. In I. Saviane, V. Ivanov, & J. Borissova (Eds.), Groups of Galaxies in the Nearby Universe: Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005 (pp. 181-185). (ESO Astrophysics Symposia; Vol. 2007). https://doi.org/10.1007/978-3-540-71173-5_30

Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies. / Lee, H.; Skillman, E. D.; Cannon, J. M. et al.
Groups of Galaxies in the Nearby Universe: Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005. ed. / Ivo Saviane; Valentin Ivanov; Jordanka Borissova. 2007. p. 181-185 (ESO Astrophysics Symposia; Vol. 2007).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Lee, H, Skillman, ED, Cannon, JM, Jackson, DC, Gehrz, RD, Polomski, E & Woodward, CE 2007, Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies. in I Saviane, V Ivanov & J Borissova (eds), Groups of Galaxies in the Nearby Universe: Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005. ESO Astrophysics Symposia, vol. 2007, pp. 181-185. https://doi.org/10.1007/978-3-540-71173-5_30

Lee H, Skillman ED, Cannon JM, Jackson DC, Gehrz RD, Polomski E et al. Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies. In Saviane I, Ivanov V, Borissova J, editors, Groups of Galaxies in the Nearby Universe: Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005. 2007. p. 181-185. (ESO Astrophysics Symposia). doi: 10.1007/978-3-540-71173-5_30

Lee, H. ; Skillman, E. D. ; Cannon, J. M. et al. / Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies. Groups of Galaxies in the Nearby Universe: Proceedings of the ESO Workshop held at Santiago de Chile, December 5-9, 2005. editor / Ivo Saviane ; Valentin Ivanov ; Jordanka Borissova. 2007. pp. 181-185 (ESO Astrophysics Symposia).

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abstract = "For a sample of 25 dwarf irregular galaxies with distances D ≲ 5 Mpc and measured oxygen abundances, we present results derived from galaxy luminosities at 4.5 μm and stellar masses from near-infrared imaging with IRAC on the Spitzer Space Telescope. We have constructed the appropriate luminosity-metallicity (L-Z) and mass-metallicity (M-Z) relations, and compared these relations with their corresponding relations from the Sloan Digital Sky Survey (SDSS). We obtain the following results. 1. The dispersion in the near-infrared L-Z relation is reduced with respect to the dispersion in the optical L-Z relation, which agrees with expectations for reduced variations of stellar mass-to-light ratios at longer wavelengths compared to optical wavelengths. 2. The dispersion in the optical L-Z relation is similar over approximately 11 mag in optical luminosity. 3. With our constructed M-Z relation, we have extended the SDSS M-Z relation to lower masses by about 2.5 dex in stellar mass. 4. The dispersion in the M-Z relation appears to be comparable over a range of 5.5 dex in stellar mass.",

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AB - For a sample of 25 dwarf irregular galaxies with distances D ≲ 5 Mpc and measured oxygen abundances, we present results derived from galaxy luminosities at 4.5 μm and stellar masses from near-infrared imaging with IRAC on the Spitzer Space Telescope. We have constructed the appropriate luminosity-metallicity (L-Z) and mass-metallicity (M-Z) relations, and compared these relations with their corresponding relations from the Sloan Digital Sky Survey (SDSS). We obtain the following results. 1. The dispersion in the near-infrared L-Z relation is reduced with respect to the dispersion in the optical L-Z relation, which agrees with expectations for reduced variations of stellar mass-to-light ratios at longer wavelengths compared to optical wavelengths. 2. The dispersion in the optical L-Z relation is similar over approximately 11 mag in optical luminosity. 3. With our constructed M-Z relation, we have extended the SDSS M-Z relation to lower masses by about 2.5 dex in stellar mass. 4. The dispersion in the M-Z relation appears to be comparable over a range of 5.5 dex in stellar mass.

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Spitzer 4.5 μm luminosity-metallicity and mass-metallicity relations for nearby dwarf irregular galaxies

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