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Title: The H i morphology and stellar properties of strongly barred galaxies: support for bar quenching in massive spirals

Abstract

ABSTRACT Galactic bars are able to affect the evolution of galaxies by redistributing their gas, possibly contributing to the cessation of star formation. Several recent works point to ‘bar quenching’ playing an important role in massive disc galaxies. We construct a sample of six gas-rich and strongly barred disc galaxies with resolved H i observations. This sample of galaxies, which we call H i-rich barred galaxies, was identified with the help of Galaxy Zoo to find galaxies hosting a strong bar, and the Arecibo Legacy Fast Arecibo L-band Feed Array blind H i survey to identify galaxies with a high H i content. The combination of strong bar and high gas fraction is rare, so this set of six galaxies is the largest sample of its type with resolved H i observations. We measure the gas fractions, H i morphology and kinematics, and use archival optical data from the Sloan Digital Sky Survey to reveal star formation histories and bar properties. The galaxies with the lowest gas fractions (still very high for their mass) show clear H i holes, dynamically advanced bars, and low star formation rates, while those with the highest gas fractions show little impact from their bar on the H i morphology, and are stillmore » actively star-forming. These galaxies support a picture in which the movement of gas by bars can lead to star formation quenching. How these unusual galaxies came to be is an open question.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [5]
  1. Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
  2. Kapteyn Astronomical Institute, University of Groningen, Landleven 12, NL-9747 AD Groningen, the Netherlands, ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands
  3. Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK, Department of Physics and Astronomy, Haverford College, 370 Lancaster Ave, Haverford, PA 19041, USA
  4. European Space Agency, ESTEC, Keplerlaan 1, PO Box 299, NL-2200 AG Noordwijk, the Netherlands
  5. Oxford Astrophysics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1597520
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 492 Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Newnham, L., Hess, Kelley M., Masters, Karen L., Kruk, Sandor, Penny, Samantha J., Lingard, Tim, and Smethurst, R. J. The H i morphology and stellar properties of strongly barred galaxies: support for bar quenching in massive spirals. United Kingdom: N. p., 2020. Web. doi:10.1093/mnras/staa064.
Newnham, L., Hess, Kelley M., Masters, Karen L., Kruk, Sandor, Penny, Samantha J., Lingard, Tim, & Smethurst, R. J. The H i morphology and stellar properties of strongly barred galaxies: support for bar quenching in massive spirals. United Kingdom. doi:10.1093/mnras/staa064.
Newnham, L., Hess, Kelley M., Masters, Karen L., Kruk, Sandor, Penny, Samantha J., Lingard, Tim, and Smethurst, R. J. Tue . "The H i morphology and stellar properties of strongly barred galaxies: support for bar quenching in massive spirals". United Kingdom. doi:10.1093/mnras/staa064.
@article{osti_1597520,
title = {The H i morphology and stellar properties of strongly barred galaxies: support for bar quenching in massive spirals},
author = {Newnham, L. and Hess, Kelley M. and Masters, Karen L. and Kruk, Sandor and Penny, Samantha J. and Lingard, Tim and Smethurst, R. J.},
abstractNote = {ABSTRACT Galactic bars are able to affect the evolution of galaxies by redistributing their gas, possibly contributing to the cessation of star formation. Several recent works point to ‘bar quenching’ playing an important role in massive disc galaxies. We construct a sample of six gas-rich and strongly barred disc galaxies with resolved H i observations. This sample of galaxies, which we call H i-rich barred galaxies, was identified with the help of Galaxy Zoo to find galaxies hosting a strong bar, and the Arecibo Legacy Fast Arecibo L-band Feed Array blind H i survey to identify galaxies with a high H i content. The combination of strong bar and high gas fraction is rare, so this set of six galaxies is the largest sample of its type with resolved H i observations. We measure the gas fractions, H i morphology and kinematics, and use archival optical data from the Sloan Digital Sky Survey to reveal star formation histories and bar properties. The galaxies with the lowest gas fractions (still very high for their mass) show clear H i holes, dynamically advanced bars, and low star formation rates, while those with the highest gas fractions show little impact from their bar on the H i morphology, and are still actively star-forming. These galaxies support a picture in which the movement of gas by bars can lead to star formation quenching. How these unusual galaxies came to be is an open question.},
doi = {10.1093/mnras/staa064},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 492,
place = {United Kingdom},
year = {2020},
month = {1}
}

Journal Article:
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DOI: 10.1093/mnras/staa064

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