The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission

Research output: Contribution to journal › Journal article › Research › peer-review

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The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission. / Melinder, Jens; Ostlin, Goran; Hayes, Matthew; Rasekh, Armin; Mas-Hesse, J. Miguel; Cannon, John M.; Kunth, Daniel; Laursen, Peter; Runnholm, Axel; Herenz, E. Christian; Messa, Matteo; Schaerer, Daniel; Verhamme, Anne; Rivera-Thorsen, T. Emil; Guaita, Lucia; Marquart, Thomas; Puschnig, Johannes; Le Reste, Alexandra; Sandberg, Andreas; Freeland, Emily; Bridge, Joanna.

In: Astrophysical Journal, Supplement Series, Vol. 266, No. 1, 15, 01.05.2023.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Melinder, J, Ostlin, G, Hayes, M, Rasekh, A, Mas-Hesse, JM, Cannon, JM, Kunth, D, Laursen, P, Runnholm, A, Herenz, EC, Messa, M, Schaerer, D, Verhamme, A, Rivera-Thorsen, TE, Guaita, L, Marquart, T, Puschnig, J, Le Reste, A, Sandberg, A, Freeland, E & Bridge, J 2023, 'The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission', Astrophysical Journal, Supplement Series, vol. 266, no. 1, 15. https://doi.org/10.3847/1538-4365/acc2b8

APA

Melinder, J., Ostlin, G., Hayes, M., Rasekh, A., Mas-Hesse, J. M., Cannon, J. M., Kunth, D., Laursen, P., Runnholm, A., Herenz, E. C., Messa, M., Schaerer, D., Verhamme, A., Rivera-Thorsen, T. E., Guaita, L., Marquart, T., Puschnig, J., Le Reste, A., Sandberg, A., ... Bridge, J. (2023). The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission. Astrophysical Journal, Supplement Series, 266(1), [15]. https://doi.org/10.3847/1538-4365/acc2b8

Vancouver

Melinder J, Ostlin G, Hayes M, Rasekh A, Mas-Hesse JM, Cannon JM et al. The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission. Astrophysical Journal, Supplement Series. 2023 May 1;266(1). 15. https://doi.org/10.3847/1538-4365/acc2b8

Author

Melinder, Jens ; Ostlin, Goran ; Hayes, Matthew ; Rasekh, Armin ; Mas-Hesse, J. Miguel ; Cannon, John M. ; Kunth, Daniel ; Laursen, Peter ; Runnholm, Axel ; Herenz, E. Christian ; Messa, Matteo ; Schaerer, Daniel ; Verhamme, Anne ; Rivera-Thorsen, T. Emil ; Guaita, Lucia ; Marquart, Thomas ; Puschnig, Johannes ; Le Reste, Alexandra ; Sandberg, Andreas ; Freeland, Emily ; Bridge, Joanna. / The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission. In: Astrophysical Journal, Supplement Series. 2023 ; Vol. 266, No. 1.

Bibtex

@article{25024dc192e042b2a3c38bfa5e0d2880,
title = "The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission",
abstract = "We present Ly alpha imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H alpha equivalent width criteria, but no constraints on Ly alpha luminosity. We employ a pixel stellar continuum fitting code to obtain accurate continuum-subtracted Ly alpha, H alpha, and H beta maps. We find that Ly alpha is less concentrated than FUV and optical line emission in almost all galaxies with significant Ly alpha emission. We present global measurements of Ly alpha and other quantities measured in apertures designed to capture all of the Ly alpha emission. We then show how the escape fraction of Ly alpha relates to a number of other measured quantities (mass, metallicity, star formation, ionization parameter, and extinction). We find that the escape fraction is strongly anticorrelated with nebular and stellar extinction, weakly anticorrelated with stellar mass, but no conclusive evidence for correlations with other quantities. We show that Ly alpha escape fractions are inconsistent with common dust extinction laws, and discuss how a combination of radiative transfer effects and clumpy dust models can help resolve the discrepancies. We present an SFR calibration based on Ly alpha luminosity, where the equivalent width of Ly alpha is used to correct for nonunity escape fraction, and show that this relation provides a reasonably accurate SFR estimate. We also show stacked growth curves of Ly alpha for the galaxies that can be used to find aperture loss fractions at a given physical radius.",
keywords = "HUBBLE-SPACE-TELESCOPE, SIMILAR-TO 2-3, ESCAPE FRACTION, STELLAR POPULATIONS, STARBURST GALAXIES, FORMATION RATES, DUST CONTENT, NEUTRAL ISM, SURVEY. I., DEEP FIELD",
author = "Jens Melinder and Goran Ostlin and Matthew Hayes and Armin Rasekh and Mas-Hesse, {J. Miguel} and Cannon, {John M.} and Daniel Kunth and Peter Laursen and Axel Runnholm and Herenz, {E. Christian} and Matteo Messa and Daniel Schaerer and Anne Verhamme and Rivera-Thorsen, {T. Emil} and Lucia Guaita and Thomas Marquart and Johannes Puschnig and {Le Reste}, Alexandra and Andreas Sandberg and Emily Freeland and Joanna Bridge",
year = "2023",
month = may,
day = "1",
doi = "10.3847/1538-4365/acc2b8",
language = "English",
volume = "266",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - The Ly alpha Reference Sample. XIV. Ly alpha Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission

AU - Melinder, Jens

AU - Ostlin, Goran

AU - Hayes, Matthew

AU - Rasekh, Armin

AU - Mas-Hesse, J. Miguel

AU - Cannon, John M.

AU - Kunth, Daniel

AU - Laursen, Peter

AU - Runnholm, Axel

AU - Herenz, E. Christian

AU - Messa, Matteo

AU - Schaerer, Daniel

AU - Verhamme, Anne

AU - Rivera-Thorsen, T. Emil

AU - Guaita, Lucia

AU - Marquart, Thomas

AU - Puschnig, Johannes

AU - Le Reste, Alexandra

AU - Sandberg, Andreas

AU - Freeland, Emily

AU - Bridge, Joanna

PY - 2023/5/1

Y1 - 2023/5/1

N2 - We present Ly alpha imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H alpha equivalent width criteria, but no constraints on Ly alpha luminosity. We employ a pixel stellar continuum fitting code to obtain accurate continuum-subtracted Ly alpha, H alpha, and H beta maps. We find that Ly alpha is less concentrated than FUV and optical line emission in almost all galaxies with significant Ly alpha emission. We present global measurements of Ly alpha and other quantities measured in apertures designed to capture all of the Ly alpha emission. We then show how the escape fraction of Ly alpha relates to a number of other measured quantities (mass, metallicity, star formation, ionization parameter, and extinction). We find that the escape fraction is strongly anticorrelated with nebular and stellar extinction, weakly anticorrelated with stellar mass, but no conclusive evidence for correlations with other quantities. We show that Ly alpha escape fractions are inconsistent with common dust extinction laws, and discuss how a combination of radiative transfer effects and clumpy dust models can help resolve the discrepancies. We present an SFR calibration based on Ly alpha luminosity, where the equivalent width of Ly alpha is used to correct for nonunity escape fraction, and show that this relation provides a reasonably accurate SFR estimate. We also show stacked growth curves of Ly alpha for the galaxies that can be used to find aperture loss fractions at a given physical radius.

AB - We present Ly alpha imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H alpha equivalent width criteria, but no constraints on Ly alpha luminosity. We employ a pixel stellar continuum fitting code to obtain accurate continuum-subtracted Ly alpha, H alpha, and H beta maps. We find that Ly alpha is less concentrated than FUV and optical line emission in almost all galaxies with significant Ly alpha emission. We present global measurements of Ly alpha and other quantities measured in apertures designed to capture all of the Ly alpha emission. We then show how the escape fraction of Ly alpha relates to a number of other measured quantities (mass, metallicity, star formation, ionization parameter, and extinction). We find that the escape fraction is strongly anticorrelated with nebular and stellar extinction, weakly anticorrelated with stellar mass, but no conclusive evidence for correlations with other quantities. We show that Ly alpha escape fractions are inconsistent with common dust extinction laws, and discuss how a combination of radiative transfer effects and clumpy dust models can help resolve the discrepancies. We present an SFR calibration based on Ly alpha luminosity, where the equivalent width of Ly alpha is used to correct for nonunity escape fraction, and show that this relation provides a reasonably accurate SFR estimate. We also show stacked growth curves of Ly alpha for the galaxies that can be used to find aperture loss fractions at a given physical radius.

KW - HUBBLE-SPACE-TELESCOPE

KW - SIMILAR-TO 2-3

KW - ESCAPE FRACTION

KW - STELLAR POPULATIONS

KW - STARBURST GALAXIES

KW - FORMATION RATES

KW - DUST CONTENT

KW - NEUTRAL ISM

KW - SURVEY. I.

KW - DEEP FIELD

U2 - 10.3847/1538-4365/acc2b8

DO - 10.3847/1538-4365/acc2b8

M3 - Journal article

VL - 266

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 15

ER -

ID: 347790039