NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-26 T07:41:15 PDT
Help | Comment | NED Home

For refcode 2013ApJ...771...59M:
Retrieve 218 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2013ApJ...771...59M The Impact of Bars on Disk Breaks as Probed by S^4^G Imaging Munoz-Mateos, Juan Carlos; Sheth, Kartik; Gil de Paz, Armando; Meidt, Sharon; Athanassoula, E.; Bosma, Albert; Comeron, Sebastien; Elmegreen, Debra M.; Elmegreen, Bruce G.; Erroz-Ferrer, Santiago; Gadotti, Dimitri A.; Hinz, Joannah L.; Ho, Luis C.; Holwerda, Benne; Jarrett, Thomas H.; Kim, Taehyun; Knapen, Johan H.; Laine, Jarkko; Laurikainen, Eija; Madore, Barry F.; Menendez-Delmestre, Karin; Mizusawa, Trisha; Regan, Michael; Salo, Heikki; Schinnerer, Eva; Seibert, Mark; Skibba, Ramin; Zaritsky, Dennis Abstract. We have analyzed the radial distribution of old stars in a sample of 218 nearby face-on disks, using deep 3.6 micron 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_sun_, the distribution is bimodal, peaking at R_br_/R_bar_ ~ 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 10^10^ M_sun_, breaks are found up 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 ~2 R_bar_, but also for many of those found at larger radii. Key words: galaxies: evolution, galaxies: photometry, galaxies: spiral, galaxies: stellar content, galaxies: structure
Retrieve 218 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home