Bibcode
Cuomo, V.; Corsini, E. M.; Aguerri, J. A. L.; Debattista, V. P.; Coccato, L.; Costantin, L.; Dalla Bontà, E.; Iodice, E.; Méndez-Abreu, J.; Morelli, L.; Pagotto, I.; Pizzella, A.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 488, Issue 4, p.4972-4983
Advertised on:
10
2019
Citations
15
Refereed citations
14
Description
We present surface photometry and stellar kinematics of NGC 4264, a
barred lenticular galaxy in the region of the Virgo Cluster undergoing a
tidal interaction with one of its neighbours, NGC 4261. We measured the
bar radius (abar = 3.2 ± 0.5 kpc) and strength
(Sbar = 0.31 ± 0.04) of NGC 4264 from Sloan Digital
Sky Survey imaging and its bar pattern speed (Ωbar = 71
± 4 km s-1 kpc-1) using the
Tremaine-Weinberg method with stellar-absorption integral-field
spectroscopy performed with the Multi Unit Spectroscopic Explorer at the
Very Large Telescope. We derived the circular velocity (Vcirc
= 189 ± 10 km s-1) by correcting the stellar streaming
velocity for asymmetric drift and calculated the corotation radius
(Rcor = 2.8 ± 0.2 kpc) from the bar pattern speed.
Finally, we estimated the bar rotation rate
(Rcor/abar = 0.88 ± 0.23). We find that NGC
4264 hosts a strong and large bar extending out to the corotation
radius. This means that the bar is rotating as fast as it can like
nearly all the other bars measured so far even when the systematic error
due to the uncertainty on the disc position angle is taken into account.
The accurate measurement of the bar rotation rate allows us to infer
that the formation of the bar of NGC 4264 was due to self-generated
internal processes and not triggered by the ongoing interaction.
Related projects
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