2003A&A...407L..59N

Query : 2003A&A...407L..59N

2003A&A...407L..59N - Astronomy and Astrophysics, volume 407L59-62 (2003/9-1)

The puzzle about the radial cut-off in galactic disks.

NARAYAN C.A. and JOG C.J.

Abstract (from CDS):

The stellar disk in a spiral galaxy is believed to be truncated physically because the disk surface brightness is observed to fall faster than that for an exponential in the outer, faint regions. We review the literature associated with this phenomenon and find that a number of recent observations contradict the truncation picture. Hence we question the very existence of a physical outer cut-off in stellar disks. We show, in this paper, that the observed drop in the surface brightness profiles in fact corresponds to a negligible decrease in intensity, and that this minor change at the faint end appears to be exaggerated on a log-normal plot. Since minor deviations from a perfect exponential are common throughout the disk, we suggest that such a deviation at the faint end could easily give rise to the observed sharp drop.

Abstract Copyright: ∼

Journal keyword(s): galaxies: fundamental parameters - galaxies: photometry - galaxies: spiral - galaxies: structure - Galaxy: structure

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 ESO 187-8 Sy2 20 43 24.932 -56 12 13.28   15.76   14.61   ~ 33 0

Query : 2003A&A...407L..59N

Basic data :
ESO 187-8 -- Seyfert 2 Galaxy
Other object types: otypes_help 		G (2016A&A,ESO,...), Sy2 (2022ApJS), AG? (2020MNRAS)
ICRS coord. (ep=J2000) : 		20 43 24.932 -56 12 13.28 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		20 39 34.828 -56 23 02.66 [ ]
Gal coord. (ep=J2000) : 		341.293381 -37.683595 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 4412 [~] / z(~) 0.014827 [~] / cz 4444.95 [~]
   D 1992ApJS...81..413M
Morphological type: 		6.0 D 1989ESOLV.C......0L
Angular size (arcmin): 		1.46827 0.221562 82 (Opt) B 2023ApJS..269....3M
Fluxes (8) :
B 15.76 [~] C 1989ESOLV.C......0L
R 14.61 [~] C 1989ESOLV.C......0L
J 13.843 [0.075] C 2006AJ....131.1163S
H 13.799 [0.182] D 2006AJ....131.1163S
K 13.484 [0.207] D 2006AJ....131.1163S
g (AB) 15.5850 [0.0021] B 2023ApJS..269....3M
r (AB) 14.9469 [0.0025] B 2023ApJS..269....3M
z (AB) 14.4842 [0.0028] B 2023ApJS..269....3M
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Identifiers (10) :
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ESO 187-8 ESO-LV 187-0080 2MASX J20432493-5612132 SGC 203935-5623.1
APMBGC 187+107+073 FGCE 1513 2MFGC 15705
6dFGS gJ204325.0-561213 LEDA 65253 RFGC 3632

References (33 between 1850 and 2026) (Total 33)
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 : 5    Distance : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : ESO 187-8

Link by name to the catalogue in VizieR :

ESO-LV 187-0080 2MASX J20432493-5612132 RFGC 3632

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