2017A&A...598A.114C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST06:13:40

2017A&A...598A.114C - Astronomy and Astrophysics, volume 598A, 114-114 (2017/2-1)

Bars as seen by Herschel and Sloan.

CONSOLANDI G., DOTTI M., BOSELLI A., GAVAZZI G. and GARGIULO F.

Abstract (from CDS):

We present an observational study of the effect of bars on the gas component and on the star formation properties of their host galaxies in a statistically significant sample of resolved objects, the Herschel Reference Sample. The analysis of optical and far-infrared images allows us to identify a clear spatial correlation between stellar bars and the cold-gas distribution mapped by the warm dust emission. We find that the infrared counterparts of optically identified bars are either bar-like structures or dead central regions in which star formation is strongly suppressed. Similar morphologies are found in the distribution of star formation directly traced by Hα maps. The sizes of such optical and infrared structures correlate remarkably well, hinting at a causal connection. In the light of previous observations and of theoretical investigations in the literature, we interpret our findings as further evidence of the scenario in which bars drive strong inflows toward their host nuclei: young bars are still in the process of perturbing the gas and star formation clearly delineates the shape of the bars; old bars on the contrary already removed any gas within their extents, carving a dead region of negligible star formation.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: structure - galaxies: star formation - galaxies: evolution

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 91 LIN 12 35 26.430 +14 29 46.75   14.63 13.57     ~ 524 0
2 M 58 SyG 12 37 43.597 +11 49 05.12 10.80 10.48 9.66     ~ 969 2
3 NGC 4689 H2G 12 47 45.5568267764 +13 45 46.148221803   12.8       ~ 333 0
4 NGC 4691 AGN 12 48 13.60 -03 19 57.7 11.59 11.66 11.08 11.8 11.3 ~ 221 1
5 NGC 5701 GiG 14 39 11.0762411300 +05 21 48.498854025 12.03 11.76 10.88     ~ 222 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-06:13:40

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