SIMBAD references

2013ApJ...771...59M - Astrophys. J., 771, 59 (2013/July-1)

The impact of bars on disk breaks as probed by S4G imaging.

MUNOZ-MATEOS J.C., SHETH K., GIL DE PAZ A., MEIDT S., ATHANASSOULA E., BOSMA A., COMERON S., ELMEGREEN D.M., ELMEGREEN B.G., ERROZ-FERRER S., GADOTTI D.A., HINZ J.L., HO L.C., HOLWERDA B., JARRETT T.H., KIM T., KNAPEN J.H., LAINE J., LAURIKAINEN E., MADORE B.F., MENENDEZ-DELMESTRE K., MIZUSAWA T., REGAN M., SALO H., SCHINNERER E., SEIBERT M., SKIBBA R. and ZARITSKY D.

Abstract (from CDS):

We have analyzed the radial distribution of old stars in a sample of 218 nearby face-on disks, using deep 3.6 µm 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 (Rbr/Rbar) depends strongly on the total stellar mass of the galaxy. For galaxies more massive than 1010 M, the distribution is bimodal, peaking at Rbr/Rbar∼ 2 and ∼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 1010 M, breaks are found up to ∼10 Rbar, 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 ∼2 Rbar, but also for many of those found at larger radii.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: photometry - galaxies: spiral - galaxies: stellar content - galaxies: structure

VizieR on-line data: <Available at CDS (J/ApJ/771/59): table1.dat table2.dat table3.dat>

Errata: erratum vol. 818, art. 101 (2016)

Simbad objects: 221

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2021.04.16-12:47:37

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