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Abstract
Understanding the spatial distribution of metals within galaxies allows us to study the processes of chemical enrichment and mixing in the interstellar medium. In this work, we map the 2D distribution of metals using a Gaussian Process Regression (GPR) for 19 star-forming galaxies observed with the Very Large Telescope/Multi Unit Spectroscopic Explorer (VLF-MUSE) as a part of the PRANGS-MUSE survey. We find that 12 of our 19 galaxies show significant 2D metallicity variation. Those without significant variations typically have fewer metallicity measurements, indicating this is due to the dearth of H II regions in these galaxies, rather than a lack of higher-order variation. After subtracting a linear radial gradient, we see no enrichment in the spiral arms versus the disc. We measure the 50 per cent correlation scale from the two-point correlation function of these radially subtracted maps, finding it to typically be an order of magnitude smaller than the fitted GPR kernel scale length. We study the dependence of the two-point correlation scale length with a number of global galaxy properties. We find no relationship between the 50 per cent correlation scale and the overall gas turbulence, in tension with existing theoretical models. We also find more actively star-forming galaxies, and earlier type galaxies have a larger 50 per cent correlation scale. The size and stellar mass surface density do not appear to correlate with the 50 per cent correlation scale, indicating that perhaps the evolutionary state of the galaxy and its current star formation activity is the strongest indicator of the homogeneity of the metal distribution.
Keywords
ISM: abundances, ISM: evolution, galaxies: general, galaxies: ISM, Astrophysics - Astrophysics of Galaxies, CO-TO-H-2 CONVERSION FACTOR, DIFFUSE IONIZED-GAS, OXYGEN ABUNDANCE, SPIRAL GALAXIES, HII-REGIONS, ARM-INTERARM, LINE SPECTRA, GRADIENTS, MUSE, EVOLUTION

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Citation

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MLA
Williams, Thomas G., et al. “The 2D Metallicity Distribution and Mixing Scales of Nearby Galaxies.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 509, no. 1, 2022, pp. 1303–22, doi:10.1093/mnras/stab3082.
APA
Williams, T. G., Kreckel, K., Belfiore, F., Groves, B., Sandstrom, K., Santoro, F., … Watkins, E. J. (2022). The 2D metallicity distribution and mixing scales of nearby galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 509(1), 1303–1322. https://doi.org/10.1093/mnras/stab3082
Chicago author-date
Williams, Thomas G., Kathryn Kreckel, Francesco Belfiore, Brent Groves, Karin Sandstrom, Francesco Santoro, Guillermo A. Blanc, et al. 2022. “The 2D Metallicity Distribution and Mixing Scales of Nearby Galaxies.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 509 (1): 1303–22. https://doi.org/10.1093/mnras/stab3082.
Chicago author-date (all authors)
Williams, Thomas G., Kathryn Kreckel, Francesco Belfiore, Brent Groves, Karin Sandstrom, Francesco Santoro, Guillermo A. Blanc, Frank Bigiel, Médéric Boquien, Mélanie Chevance, Enrico Congiu, Eric Emsellem, Simon C.~O. Glover, Kathryn Grasha, Ralf S. Klessen, Eric Koch, J.~M. Diederik Kruijssen, Adam K. Leroy, Daizhong Liu, Sharon Meidt van der Wel, Hsi-An Pan, Miguel Querejeta, Erik Rosolowsky, Toshiki Saito, Patricia Sánchez-Blázquez, Eva Schinnerer, Andreas Schruba, and Elizabeth J. Watkins. 2022. “The 2D Metallicity Distribution and Mixing Scales of Nearby Galaxies.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 509 (1): 1303–1322. doi:10.1093/mnras/stab3082.
Vancouver
1.
Williams TG, Kreckel K, Belfiore F, Groves B, Sandstrom K, Santoro F, et al. The 2D metallicity distribution and mixing scales of nearby galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2022;509(1):1303–22.
IEEE
[1]
T. G. Williams et al., “The 2D metallicity distribution and mixing scales of nearby galaxies,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 509, no. 1, pp. 1303–1322, 2022.
@article{8747477,
  abstract     = {{Understanding the spatial distribution of metals within galaxies allows us to study the processes of chemical enrichment and mixing in the interstellar medium. In this work, we map the 2D distribution of metals using a Gaussian Process Regression (GPR) for 19 star-forming galaxies observed with the Very Large Telescope/Multi Unit Spectroscopic Explorer (VLF-MUSE) as a part of the PRANGS-MUSE survey. We find that 12 of our 19 galaxies show significant 2D metallicity variation. Those without significant variations typically have fewer metallicity measurements, indicating this is due to the dearth of H II regions in these galaxies, rather than a lack of higher-order variation. After subtracting a linear radial gradient, we see no enrichment in the spiral arms versus the disc. We measure the 50 per cent correlation scale from the two-point correlation function of these radially subtracted maps, finding it to typically be an order of magnitude smaller than the fitted GPR kernel scale length. We study the dependence of the two-point correlation scale length with a number of global galaxy properties. We find no relationship between the 50 per cent correlation scale and the overall gas turbulence, in tension with existing theoretical models. We also find more actively star-forming galaxies, and earlier type galaxies have a larger 50 per cent correlation scale. The size and stellar mass surface density do not appear to correlate with the 50 per cent correlation scale, indicating that perhaps the evolutionary state of the galaxy and its current star formation activity is the strongest indicator of the homogeneity of the metal distribution.}},
  author       = {{Williams, Thomas G. and Kreckel, Kathryn and Belfiore, Francesco and Groves, Brent and Sandstrom, Karin and Santoro, Francesco and Blanc, Guillermo A. and Bigiel, Frank and Boquien, Médéric and Chevance, Mélanie and Congiu, Enrico and Emsellem, Eric and Glover, Simon C.~O. and Grasha, Kathryn and Klessen, Ralf S. and Koch, Eric and Kruijssen, J.~M. Diederik and Leroy, Adam K. and Liu, Daizhong and van der Wel, Sharon Meidt and Pan, Hsi-An and Querejeta, Miguel and Rosolowsky, Erik and Saito, Toshiki and Sánchez-Blázquez, Patricia and Schinnerer, Eva and Schruba, Andreas and Watkins, Elizabeth J.}},
  issn         = {{0035-8711}},
  journal      = {{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}},
  keywords     = {{ISM: abundances,ISM: evolution,galaxies: general,galaxies: ISM,Astrophysics - Astrophysics of Galaxies,CO-TO-H-2 CONVERSION FACTOR,DIFFUSE IONIZED-GAS,OXYGEN ABUNDANCE,SPIRAL GALAXIES,HII-REGIONS,ARM-INTERARM,LINE SPECTRA,GRADIENTS,MUSE,EVOLUTION}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{1303--1322}},
  title        = {{The 2D metallicity distribution and mixing scales of nearby galaxies}},
  url          = {{http://doi.org/10.1093/mnras/stab3082}},
  volume       = {{509}},
  year         = {{2022}},
}

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