J/A+A/697/A185 NGC 5098/5096 g and r images (Lima Neto+, 2025)
Structure and kinematics of the interacting group NGC 5098/5096.
Lima Neto G.B., Capelato H.V., Durret F., Machado R.E.G.
<Astron. Astrophys. 697, A185 (2025)>
=2025A&A...697A.185L 2025A&A...697A.185L (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, interacting ; Photometry ; Optical
Keywords: galaxies: groups: general - galaxies: interactions -
galaxies: individual: NGC5098 - galaxies: individual: NGC5096 -
alaxies: photometry
Abstract:
Most galaxies in the Universe are found in groups, which have various
morphologies and dynamical states. Studying how groups evolve is an
important step for our understanding in both large-scale structure
formation and galaxy evolution.
We analysed the system composed by two groups at z~=0.037, NGC 5098, a
group dominated by a pair of elliptical galaxies, and NGC 5096, a
compact system which appears to be interacting with NGC 5098. We aim
to describe its current dynamical state in order to investigate how
it fits in our current cosmological fr amework.
Our analysis is based on deep CFHT/MegaCam g and r imaging, archival
Chandra X-ray data, and publicly available data of the galaxy
redshift distribution. We model the surface brightness of the 12
brightest galaxies in the field-of-view and investigate the diffuse
intragroup light that we detect. With a redshift sample of 112
galaxies, we study the dynamical states of both groups.
We detect low surface brightness diffuse light associated with both
galaxy-galaxy interactions and a possible group-group collision. The
substructure we found in velocity space indicates a past interaction
between both groups. This is further corroborated by X-ray analysis.
We conclude that NGC 5098 and NGC 5096 form a complex system, that may
have collided in the past, producing a sloshing observed in X-rays and
a large scale diffuse component of intragroup light as well as some
important tidal debris.
Description:
Reduced CFHT/MegaCam images in g and r band of NGC 5098 and NGC 5096
region.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
13 20 14.72 +33 08 36.2 NGC 5098 = MCG+06-29-077
13 20 08.70 +33 05 16.6 NGC 5096 = MCG+06-29-076
----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 121 2 List of fits images
fits/* . 2 Individual fits images
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix scale Scale of the image
26- 29 I4 --- Nx Number of pixels along X-axis
31- 34 I4 --- Ny Number of pixels along Y-axis
36- 41 I6 Kibyte size Size of FITS file
43- 65 A23 --- FileName Name of FITS file, in subdirectory fits
67-121 A55 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Gastao Lima Neto, gastao(at)astro.iag.usp.br
(End) Patricia Vannier [CDS] 21-Mar-2025