1997A&A...325..135X


Query : 1997A&A...325..135X

1997A&A...325..135X - Astronomy and Astrophysics, volume 325, 135-143 (1997/9-1)

The distribution of stars and dust in spiral galaxies: the edge-on spiral UGC 2048.

XILOURIS E.M., KYLAFIS N.D., PAPAMASTORAKIS J., PALEOLOGOU E.V. and HAERENDEL G.

Abstract (from CDS):

We compare B, V, I surface photometry of the edge-on spiral galaxy UGC 2048 with corresponding surface photometry calculated from a realistic model of spiral galaxies, taking into account both absorption and scattering by dust. Our goal is to determine the distribution of stars and dust in the galaxy from the observed surface photometry. In the model that we use we assume that the stars and the dust in the disk are distributed axisymmetrically and exponentially in both directions, the radial and the perpendicular to the plane of the disk. The de Vaucouleurs R1/4 law and the modified Hubble profile are used to fit the central region of the galaxy and a comparison is made between the two. For UGC 2048 we have found a face-on central optical depth of less than one in all three bands. This means that, if the galaxy were seen face-on, it would be transparent in the optical region of the spectrum, despite the prominent dust lane seen in the edge-on picture. We have also determined the scalelengths and scaleheights of the stars and the dust in the disk, the bulge characteristics and the inclination angle of the galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: photometry - galaxies: spiral - galaxies: individual: UGC 2048 - galaxies: ISM - ISM: dust, extinction

Simbad objects: 1

goto View the references in ADS

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 - 2022
#notes
1 NGC 973 Sy2 02 34 20.101 +32 30 20.01   13.7   9.8   ~ 124 0

Query : 1997A&A...325..135X

Basic data :
NGC 973 -- Seyfert 2 Galaxy
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
G (2015ApJS,FGC,...), IR (AKARI,IRAS,...), X (2MAXI,PBC,...), Sy2 (2009ApJ), GiG ([CHM2007]), AGN ([VV2010c]), gam (IGR)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
02 34 20.101 +32 30 20.01 (Infrared) [ ] C 2006AJ....131.1163S
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
02 31 20.131 +32 17 12.60 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
146.865984 -25.539860 [ ]
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 4852 [~] / z(emission) 0.016318 [~] / cz 4891.91 [~]
   (Rad) D 2018ApJ...861...49H
Syntax of morphological type is : mtype quality bibcode
  • mtype : Hubble morphological class (spirals, ellipticals, etc)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the morphological type reference
Morphological type:
Sb D ~
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
2.077 0.457 50 (NIR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (5) :
B 13.7 [~] D 1999PASP..111..438F
R 9.8 [~] D 2008AstL...34..367B
J 10.021 [0.013] C 2006AJ....131.1163S
H 9.184 [0.014] C 2006AJ....131.1163S
K 8.772 [0.016] C 2006AJ....131.1163S
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)

Send to sendBySAMP sendBySAMP

sedIcon
within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
sed-help-icon

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

: 5 : 40 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (27) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NGC 973 LEDA 9795 RFGC 553 Z 505-14
AKARI-IRC-V1 J0234200+323019 2MASX J02342010+3230200 SWIFT J0234.1+3233 Z 0231.3+3217
FGC 314 2MAXI J0233+324 SWIFT J0234.4+3229 [CHM2007] HDC 152 J023420.10+3230200
IGR J02343+3229 MCG+05-07-013 UGC 2048 [CHM2007] LDC 176 J023420.10+3230200
IRAS 02313+3217 2MFGC 2024 UZC J023420.2+323019 [KRL2007b] 23
IRAS F02313+3217 PBC J0234.3+3227 WISEA J023420.10+323020.5 [VV2010c] J023420.1+323020
KUG 0231+322 PSCz P02313+3217 WISE J023420.10+323020.6

References (124 between 1850 and 2022) (Total 124)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)


Collections of Measurements


velocities : 13    distance : 5   

   

Observing logs


herschel : 4   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 973

Link by name to the catalogue in VizieR :

NGC 973 AKARI-IRC-V1 J0234200+323019 FGC 314 IRAS 02313+3217 IRAS F02313+3217
KUG 0231+322 2MASX J02342010+3230200 RFGC 553 UGC 2048 WISEA J023420.10+323020.5
WISE J023420.10+323020.6

Search by coordinates in Vizier (radius: 30 arcsec)


Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

Currently no annotations available

add an annotation to this object

report an error concerning the data of this object


To bookmark this query, right click on this link: simbad:objects in 1997A&A...325..135X and select 'bookmark this link' or equivalent in the popup menu


2022.05.20-19:31:26

© Université de Strasbourg/CNRS

    • Contact