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Abstract
We have analyzed the radial distribution of old stars in a sample of 218 nearby face-on disks, using deep 3.6 mu m images from the Spitzer Survey of Stellar Structure in Galaxies. In particular, we have studied the structural properties of those disks with a broken or down-bending profile. We find that, on average, disks with a genuine single-exponential profile have a scale length and a central surface brightness which are intermediate to those of the inner and outer components of a down-bending disk with the same total stellar mass. In the particular case of barred galaxies, the ratio between the break and the bar radii (R-br/R-bar) depends strongly on the total stellar mass of the galaxy. For galaxies more massive than 10(10) M-circle dot, the distribution is bimodal, peaking at R-br/R-bar similar to 2 and similar to 3.5. The first peak, which is the most populated one, is linked to the outer Lindblad resonance of the bar, whereas the second one is consistent with a dynamical coupling between the bar and the spiral pattern. For galaxies below 10(10) M-circle dot, breaks are found up to similar to 10 R-bar, but we show that they could still be caused by resonances given the rising nature of rotation curves in these low-mass disks. While not ruling out star formation thresholds, our results imply that radial stellar migration induced by non-axisymmetric features can be responsible not only for those breaks at similar to 2 R-bar, but also for many of those found at larger radii.
Keywords
SPECTRAL ENERGY-DISTRIBUTIONS, INFRARED SURFACE PHOTOMETRY, STAR-FORMING, GALAXIES, EDGE-ON GALAXIES, SPIRAL GALAXIES, ANGULAR-MOMENTUM, RADIAL-DISTRIBUTION, STELLAR STRUCTURE, BARRED GALAXIES, SIZE EVOLUTION, galaxies: evolution, galaxies: photometry, galaxies: spiral, galaxies: stellar content, galaxies: structure

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MLA
Munoz-Mateos, Juan Carlos, et al. “The Impact of Bars on Disk Breaks as Probed by S4G Imaging.” ASTROPHYSICAL JOURNAL, vol. 771, no. 1, 2013.
APA
Munoz-Mateos, J. C., Sheth, K., de Paz, A. G., van der Wel, S. M., Athanassoula, E., Bosma, A., … Zaritsky, D. (2013). The impact of bars on disk breaks as probed by S4G imaging. ASTROPHYSICAL JOURNAL, 771(1).
Chicago author-date
Munoz-Mateos, Juan Carlos, Kartik Sheth, Armando Gil de Paz, Sharon Meidt van der Wel, E Athanassoula, Albert Bosma, Sebastien Comeron, et al. 2013. “The Impact of Bars on Disk Breaks as Probed by S4G Imaging.” ASTROPHYSICAL JOURNAL 771 (1).
Chicago author-date (all authors)
Munoz-Mateos, Juan Carlos, Kartik Sheth, Armando Gil de Paz, Sharon Meidt van der Wel, E Athanassoula, Albert Bosma, Sebastien Comeron, Debra M Elmegreen, Bruce G Elmegreen, Santiago Erroz-Ferrer, Dimitri A Gadotti, Joannah L Hinz, Luis C Ho, Benne Holwerda, Thomas H Jarrett, Taehyun Kim, Johan H Knapen, Jarkko Laine, Eija Laurikainen, Barry F Madore, Karin Menendez-Delmestre, Trisha Mizusawa, Michael Regan, Heikki Salo, Eva Schinnerer, Mark Seibert, Ramin Skibba, and Dennis Zaritsky. 2013. “The Impact of Bars on Disk Breaks as Probed by S4G Imaging.” ASTROPHYSICAL JOURNAL 771 (1).
Vancouver
1.
Munoz-Mateos JC, Sheth K, de Paz AG, van der Wel SM, Athanassoula E, Bosma A, et al. The impact of bars on disk breaks as probed by S4G imaging. ASTROPHYSICAL JOURNAL. 2013;771(1).
IEEE
[1]
J. C. Munoz-Mateos et al., “The impact of bars on disk breaks as probed by S4G imaging,” ASTROPHYSICAL JOURNAL, vol. 771, no. 1, 2013.
@article{8622835,
  abstract     = {We have analyzed the radial distribution of old stars in a sample of 218 nearby face-on disks, using deep 3.6 mu m images from the Spitzer Survey of Stellar Structure in Galaxies. In particular, we have studied the structural properties of those disks with a broken or down-bending profile. We find that, on average, disks with a genuine single-exponential profile have a scale length and a central surface brightness which are intermediate to those of the inner and outer components of a down-bending disk with the same total stellar mass. In the particular case of barred galaxies, the ratio between the break and the bar radii (R-br/R-bar) depends strongly on the total stellar mass of the galaxy. For galaxies more massive than 10(10) M-circle dot, the distribution is bimodal, peaking at R-br/R-bar similar to 2 and similar to 3.5. The first peak, which is the most populated one, is linked to the outer Lindblad resonance of the bar, whereas the second one is consistent with a dynamical coupling between the bar and the spiral pattern. For galaxies below 10(10) M-circle dot, breaks are found up to similar to 10 R-bar, but we show that they could still be caused by resonances given the rising nature of rotation curves in these low-mass disks. While not ruling out star formation thresholds, our results imply that radial stellar migration induced by non-axisymmetric features can be responsible not only for those breaks at similar to 2 R-bar, but also for many of those found at larger radii.},
  articleno    = {59},
  author       = {Munoz-Mateos, Juan Carlos and Sheth, Kartik and de Paz, Armando Gil and van der Wel, Sharon Meidt and Athanassoula, E and Bosma, Albert and Comeron, Sebastien and Elmegreen, Debra M and Elmegreen, Bruce G and Erroz-Ferrer, Santiago and Gadotti, Dimitri A and Hinz, Joannah L and Ho, Luis C and Holwerda, Benne and Jarrett, Thomas H and Kim, Taehyun and Knapen, Johan H and Laine, Jarkko and Laurikainen, Eija and Madore, Barry F and Menendez-Delmestre, Karin and Mizusawa, Trisha and Regan, Michael and Salo, Heikki and Schinnerer, Eva and Seibert, Mark and Skibba, Ramin and Zaritsky, Dennis},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {SPECTRAL ENERGY-DISTRIBUTIONS,INFRARED SURFACE PHOTOMETRY,STAR-FORMING,GALAXIES,EDGE-ON GALAXIES,SPIRAL GALAXIES,ANGULAR-MOMENTUM,RADIAL-DISTRIBUTION,STELLAR STRUCTURE,BARRED GALAXIES,SIZE EVOLUTION,galaxies: evolution,galaxies: photometry,galaxies: spiral,galaxies: stellar content,galaxies: structure},
  language     = {eng},
  number       = {1},
  pages        = {30},
  title        = {The impact of bars on disk breaks as probed by S⁴G imaging},
  url          = {http://dx.doi.org/10.1088/0004-637X/771/1/59},
  volume       = {771},
  year         = {2013},
}

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