Bibcode
Costantin, L.; Thorne, B.; Méndez-Abreu, J.; de Lorenzo-Cáceres, A.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 1, p.665-686
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3
2019
Citations
20
Refereed citations
20
Description
We present here a thorough photometric analysis of double-barred
galaxies, consisting of (i) two-dimensional photometric decompositions
including a bulge, inner bar, outer bar, and (truncated) disc; and (ii)
three-dimensional statistical deprojections to derive the intrinsic
shape of bulges, inner bars, and outer bars. This is the first time the
combination of both techniques is applied to a sample of double-barred
galaxies. It represents a step forward with respect to previous works,
which are based on properties of the integrated light through ellipse
fitting and unsharp masking. In this first paper of a series of two, we
analyse the nature of the dominant bulges within double-barred systems
by using several photometric diagnostics, namely Sérsic index,
Kormendy relation, colours, and the better suited intrinsic flattening.
Our results indicate that almost all bulges in our sample are classical,
whereas only two out of the 17 galaxies under study appear as potential
candidates to host secularly formed disc-like bulges. Such result poses
the possibility that having a central hot structure may be a requirement
for inner bar formation.
Related projects
![The photograph is a combination of visible and near-infrared light, the immense cluster is a rich mix of galaxy shapes. The brightest and largest galaxies in the cluster are the yellow-white, massive, elliptical galaxies containing many hundreds of billions of stars each. Spiral galaxies — like our Milky Way — have younger populations of stars and are bluish. NASA, ESA, and J. Lotz and the HFF Team (STScI) Abell 370 is located approximately 4 billion light-years away in the constellation Cetus, the Sea Monster](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/Imagen%20Jairo.png?itok=-47xHY8B)
Galaxy Evolution in Clusters of Galaxies
Galaxies in the universe can be located in different environments, some of them are isolated or in low density regions and they are usually called field galaxies. The others can be located in galaxy associations, going from loose groups to clusters or even superclusters of galaxies. One of the foremost challenges of the modern Astrophysics is to
Jairo
Méndez Abreu