View source for Template:Infobox galaxy/doc

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Infobox for articles on [[galaxy|galaxies]].

== Usage ==
{| style="background: transparent;"
|<pre>{{Infobox galaxy
| name               = 
| image              =
| image_size         = 
| upright            =
| caption            = 
| alt                =
| epoch              = 
| pronounce          = {{IPA-en|<!-- IPA string -->|}}
| constellation name = 
| ra                 = {{RA|00|00|00}} <!-- or {{Deg2HMS|000.0000|sup=yes}} -->
| dec                = {{DEC|±00|00|00}}
| z                  = 
| h_radial_v         = 
| gal_v              = 
| dist_pc            = {{cvt|000|+/-|00|kpc|kly|order=flip|lk=on}}{{hub|0.73}} <!-- comoving distance -->
| dist_ly            = {{cvt|000|+/-|00|kpc|kly|order=flip|lk=on}}{{hub|0.73}}
| group_cluster      = 
| type               = 
| mass               = <!-- In solar masses {{Val|0|e=0}} -->
| mass_light_ratio   = <!-- In solar units  -->
| size               = <!-- In light years  -->
| stars              = 
| appmag_v           = 
| appmag_b           = 
| absmag_v           = 
| size_v             = 
| half_light_radius_pc        = <!-- physical dimension, pc preferred -->
| half_light_radius_arcminsec = <!-- apparent dimension -->
| h1_scale_length_pc          = <!-- physical dimension, pc preferred -->
| h1_scale_length_arcminsec   = <!-- apparent dimension -->
| xray_radius_pc              = <!-- physical dimension, pc preferred -->
| xray_radius_arcminsec       = <!-- apparent dimension -->
| notes              = 
| names              = 
| references         = 
}}</pre>
|}

== Parameters ==

=== z, h_radial_v, gal_v ===
The <code>redshift</code> parameter ([[Redshift|z]]) can either list the [[radial velocity]] of the galaxy in units of km/s, or the dimensionless quantity ''z''. The former is used when the value of ''z'' has a very small value, such as less than 0.1.

The parameter {{para|gal_v}} refers to the galactrocentric radial velocity (the radial velocity relative to the Milky Way), which can be found on NED under the section "Quantities Derived from Redshift" if one looks up a galaxy.

=== dist_ly ===
The <code>dist_ly</code> field can list the distance in both [[light-year]]s and [[parsec]]s by using the {{tl|Convert}} template. For example: {{tlx|convert|2810|+/-|90|kly|kpc|abbr{{=}}on|lk{{=}}on}} gives: {{convert|2810|+/-|90|kly|kpc|abbr=on|lk=on}}
* {{tl|hub}} identifies the [[dimensionless Hubble parameter]] used in the distance measurement. Using NED's default value of 0.73, {{xpd5op3c||||||hub|0.73|}}.
* {{xpd5op3c||||||hub||}} if distance is left in 'units' of h.

=== group_cluster ===
The parameter {{para|group_cluster}} refers to the [[galaxy group]] or [[galaxy cluster]] that the galaxy is located in.

=== type ===
The parameter {{para|type}} is the [[Galaxy morphological classification|de Vancoleurs morphological type]] of the galaxy. These can be found on NED or SIMBAD. (Note that a <code>^</code> in NED is actually a superscript, so for example S0^0 should be written as S0<sup>0</sup> .)

In SIMBAD the morphological type is often given as a number between -6 and 11. To convert these into the de Vaucouleurs class, use this table from [[Galaxy morphological classification#Numerical Hubble stage|this article]]:
{| class="wikitable" style="text-align: center; margin: 1em auto;"
|+ Converting numerical Hubble stage to de Vancoleurs classes
! Numerical Hubble stage
| −6
| −5
| −4
| −3
| −2
| −1
| 0
| 1
| 2
| 3
| 4
| 5
| 6
| 7
| 8
| 9
| 10
| 11
|-
!de Vaucouleurs class
| cE
| E
| E<sup>+</sup>
| S0<sup>−</sup>
| S0<sup>0</sup>
| S0<sup>+</sup>
| S0/a
| Sa
| Sab
| Sb
| Sbc
| Sc
| Scd
| Sd
| Sdm
| Sm
| Im
| Irr
|-
|}

== See also ==
* [[Template:Cite journal]]
* [[Template:Cite web]]
* [[Template:Infobox galaxy cluster]]
* [[Template:Infobox globular cluster]]

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[[Category:Astronomy infobox templates|Galaxy]]

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