2024ApJ...975...11G

Query : 2024ApJ...975...11G

2024ApJ...975...11G - Astrophys. J., 975, 11 (2024/November-1)

Energy Evolution in the Progenitor of Galaxy Shells: A Semi-analytical Model.

GUO B., WU X., ZHAO H. and FAN L.

Abstract (from CDS):

The stellar shells surrounding an elliptical galaxy, as remnants of a dwarf galaxy disrupted during merging, reveal the distribution of energy and angular momentum of the progenitor dwarf galaxy. We develop a semi-analytical model to describe the changes in energy ΔEi and angular momentum ΔLzi for particles during the first infall. We show that these changes, induced by the self-gravity of the progenitor, are important in broadening the initial energy distribution of the Plummer or Hernquist progenitor model. Consequently, these changes are crucial in shaping the shells. In the freefall stage following the disintegration of the progenitor potential, particles are no longer bound by self-gravity but move within the gravitational potential of the target galaxy. We investigate the relationship between the radial period and the energy of particles undergoing radial motion. We show that an accurate model of the energy range of the dwarf galaxy at disruption is essential to predict the number of observable shells.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy mass distribution - Stellar streams - Astronomical simulations - Interacting galaxies - Galaxy mergers - Galaxy dynamics - N-body simulations

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 371 1

Query : 2024ApJ...975...11G

Basic data :
NGC 474 -- Galaxy in Pair of Galaxies
Other object types: otypes_help 		G (2016A&A,APG,...), GiG (K79,[CHM2007],...), Opt (LAMOST,SDSS), GiP ([BGK2003]), GiC (CAIRNS), AG? (2020MNRAS), * (Gaia)
ICRS coord. (ep=J2000) : 		01 20 06.6870520512 +03 24 55.861973100 (Optical) [ 0.6107 0.4749 90 ] C 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		01 17 31.6385055180 +03 09 12.283117653 [ 0.6107 0.4749 90 ]
Gal coord. (ep=J2000) : 		136.7975434308748 -58.6821721408348 [ 0.6107 0.4749 90 ]
Radial velocity / Redshift / cz : 		V(km/s) 2412 [15] / z(spectroscopic) 0.00808 [0.00005] / cz 2422.0 [15.0]
   C 2006AJ....132..197W
Morphological type: 		E/S0 D 2011AJ....141...74H
Angular size (arcmin): 		2.50372 2.22405 21 (Opt) B 2023ApJS..269....3M
Fluxes (14) :
U 12.75 [0.13] D 2007ApJS..173..185G
B 12.37 [0.13] D 2007ApJS..173..185G
V 11.51 [0.13] D 2007ApJS..173..185G
R 11.42 [~] D 2011AJ....141...74H
G 18.225477 [0.008068] C 2020yCat.1350....0G
I 10.56 [~] D 2011AJ....141...74H
J 9.487 [0.026] C 2006AJ....131.1163S
H 8.803 [0.034] C 2006AJ....131.1163S
K 8.555 [0.039] C 2006AJ....131.1163S
u (AB) 14.325 [0.004] B 2020ApJS..249....3A
g (AB) 12.442 [0.002] B 2020ApJS..249....3A
r (AB) 11.634 [0.001] B 2020ApJS..249....3A
i (AB) 11.226 [0.001] B 2020ApJS..249....3A
z (AB) 10.967 [0.002] B 2020ApJS..249....3A
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notes:

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 6
: 22 		: 14 Display criteria :

Identifiers (23) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NGC 474 LEDA 4801 UZC J012006.7+032455 [HDL96] 385 8
APG 227 2MASX J01200669+0324549 Z 385-71 [M98c] 011731.7+030917
CAIRNS J012006.70+032455.0 MCG+00-04-085 Z 0117.5+0309 [VDD93] 6
CAIRNS J012006.70+032455.1 SDSS J012006.68+032455.8 [BGK2003] B011731.6+030912 [WGB2006] 011712+03080 b
K79 5C TC E5 [CHM2007] HDC 67 J012006.69+0324549 Gaia DR3 2562761428805166080
LAMOST J012006.68+032455.9 UGC 864 [CHM2007] LDC 85 J012006.69+0324549

References (371 between 1850 and 2026) (Total 371)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 17    Distance : 7   

   

Observing logs
ISO : 1    XMM : 1   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 474

Link by name to the catalogue in VizieR :

NGC 474 APG 227 2MASX J01200669+0324549 SDSS J012006.68+032455.8 UGC 864
Gaia DR3 2562761428805166080

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