Barred galaxies. I. A catalog

Kandalian, R. A.; Kalloghlian, A. T.

doi:10.1007/bf03036044

Cited by 3 publications

(2 citation statements)

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“…Kandalian & Kalloghlian (1998), Chapelon et al (1999) and Cabrera-Lavers & Garzón (2004) found evidence of a central isophotal distortion that they explain postulating the existence of a bar with diameter of 38 . Other authors did not confirm the presence of a bar in UGC 4284, nevertheless they encountered non-circular and off-plane gas motion in the inner region of UGC 4284 that they discuss as originated by a warped gaseous disk (Coccato et al 2004;Józsa 2007).…”

Section: D Galfit Disk/bulge/bar Decomposition Of Ugc 4284mentioning

confidence: 99%

Outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861: constraining the baryonic content through stellar population synthesis studies

Repetto

Martínez-García

Rosado

et al. 2015

Monthly Notices of the Royal Astronomical Society

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In this article we investigate the outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861, taking advantage of published HI and Hα high resolution rotation curves and constraining the stellar disk of both galaxies throughout stellar population synthesis studies. In addition we take into account the gas content of both galaxies deriving the HI+He rotation curve. The deduced baryonic rotation curves (star+gas) are inadequate to account for the total mass of UGC 4284 and UGC 11861, for that reason we examine the possibility of dark matter to explain the incongruity between the observed HI and Hα rotation curves of UGC 4284 and UGC 11861 and the derived baryonic rotation curves. We consider NFW, Burkert, DiCintio, Einasto, and the Stadel dark matter halos, to analyse the dark matter content of UGC 4284 and UGC 11861. The principal results of this work are that cored dark matter models better reproduce the dark matter Hα and HI rotation curves of UGC 11861 and the dark matter HI rotation curve of UGC 4284, while, the Hα rotation curve of UGC 4284 is better reproduced by a cuspy DiCintio DM model. In general, cored exponential two-parameters models Einasto and Stadel, give better fits than Burkert. This trend, as well as to confirm past results, presents for the first time a comparison between two different exponential dark matter models, Einasto and Stadel, in an attempt to better constrain the range of possible exponential dark matter models applied to real galaxies.

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Section: D Galfit Disk/bulge/bar Decomposition Of Ugc 4284mentioning

confidence: 99%

Outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861: constraining the baryonic content through stellar population synthesis studies

Repetto

Martínez-García

Rosado

et al. 2015

Monthly Notices of the Royal Astronomical Society

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“…As we see, this galaxy displays interesting morphological features at large, as well as in small spatial scales. Due to its overall structure, NGC 352 has been classified in the SB class of galaxies (de Souza & dos Anjos 1987; Kandalian & Kalloghlian 1998), that is, it has been considered as a barred-spiral one.…”

Section: Observational Datamentioning

confidence: 99%

Edge-on boxes with X-features as parts of galactic bars

Patsis

Xilouris

Alikakos

et al. 2021

A&A

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Context. This paper is a contribution to the discussion about whether the X/peanut component is part of the bar, or the bar itself. Aims. Our goal is to present a clear-cut case of a barred-spiral galaxy in which all structural components (i.e. the thick and thin part of the bar and the spiral arms) can be observed in its image and their dimensions directly measured there. Methods. We obtained deep images of the nearby galaxy NGC 352, which has an ideal inclination allowing us to observe all of the parts that compose its morphology, estimate their relative sizes, and determine the topology of the luminous matter of this galaxy. We successfully compare our findings with the existence and the relative dimensions of the corresponding components encountered in the disc of a GADGET N-body model. Results. NGC 352 is a barred spiral galaxy with a bar of about 13 kpc radius. Its bar has a central thick part that extends up to a distance about 5 kpc from the centre of the galaxy along its major axis, while its thickness reaches a height of 3.8 kpc. Thus, the thick part of the bar occupies the central part of the bar component, and its length is about 40% of that of the thin bar. The branches of the X-feature are characterised by the presence of ‘hooks’ at their extremities. The profile along the major axis of the bar is characterised by the presence of ‘shoulders’, the end of which is associated with local surface brightness enhancements on the equatorial plane. A central disc with a spiral-like feature embedded in it dominates in the innermost 1.7 kpc. Conclusions. NGC 352 offers a case in which we directly observe that the X/peanut component is unambiguously part of the bar. This boxy structure is neither a separate bulge component nor the bar itself. The relative extent of the peanut with respect to the bar is well inside the range predicted in the majority of the simulated N-body bars. The hooks of the X-feature and the local surface brightness enhancements on the equatorial plane have their counterparts in surface density features of models based on the orbital theory, as well as of models based on response calculations and of fully selfconsistent N-body calculations.

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An Optical Study of a Sample of Spiral Galaxies

Cabrera-Lavers¹,

Garzón²

2004

Astron J

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Barred galaxies. I. A catalog

Cited by 3 publications

References 0 publications

Outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861: constraining the baryonic content through stellar population synthesis studies

Outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861: constraining the baryonic content through stellar population synthesis studies

Edge-on boxes with X-features as parts of galactic bars

An Optical Study of a Sample of Spiral Galaxies

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