View source for NGC 6744

{{Short description|Galaxy in the constellation Pavo}}
{{Sky|19|09|46.1785|-|63|51|26.992}}
{{Use dmy dates|date=September 2024}}
__NOTOC__
{{Infobox Galaxy
| name = [[New General Catalogue|NGC]] 6744
| image = Wide Field Imager view of a Milky Way look-alike NGC 6744.jpg
| caption = [[European Southern Observatory#MPG/ESO 2.2-metre Telescope|Wide Field Imager]] view of a Milky Way look-alike NGC 6744
| epoch = [[J2000]]
| type = SAB(r)bc<ref name="ned">{{cite web
  | website=NASA/IPAC Extragalactic Database
  | publisher = [[NASA]] and [[California_Institute_of_Technology|Caltech]]
  | title=Results for object NGC 6744
  | url=https://ned.ipac.caltech.edu/byname?objname=NGC+6744
  | access-date=2006-08-31 }}</ref>
| ra = {{RA|19|09|46.1785}}<ref name="ned" />
| dec = {{DEC|-63|51|26.992}}<ref name="ned" />
| z = 0.002805<ref name=ned/>
| h_radial_v = {{nowrap|841 ± 2 [[Metre per second|km/s]]}}<ref name=ned/>
| dist_ly = {{convert|7.244 ± 0.514|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name=ned-dist>{{cite web
  |title=Distance Results for NGC 6744
  |work=NASA/IPAC Extragalactic Database
  |publisher = [[NASA]] and [[California_Institute_of_Technology|Caltech]]
  |url=http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6744
  |access-date=2010-06-19}}</ref>
| group_cluster = Virgo Supercluster
| size = ~{{convert|52.68|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}
| appmag_v = 9.14<ref name="ned" />
| size_v = {{Val|20.0|×|12.9|u=arcminute}}<ref name="ned" />
| constellation name = [[Pavo (constellation)|Pavo]]
| names = {{odlist | name = [[Caldwell catalogue|Caldwell]] 101 | PGC= 62836 | name2= ESO 104- G 042 | IRAS= 19051-6357}}<ref name="ned" />
}}

'''NGC 6744''' (also known as '''Caldwell 101''' or the '''Pavo Galaxy'''<ref name="interstellarum">{{cite book|last1=Stoyan|first1=Ronald|last2=Schurig|first2=Stephan|title=interstellarum Deep Sky Atlas|publisher=Cambridge University Press; Oculum-Verlag GmbH|publication-place=Erlangen|date=2014|isbn=978-1-107-50338-0|oclc=920437579|url=http://www.deep-sky-atlas.com/}}</ref>) is an [[intermediate spiral galaxy]] in the [[constellation]] [[Pavo (constellation)|Pavo]] (Peacock). Its velocity with respect to the [[cosmic microwave background]] is 802 ± 3{{nbsp}}km/s, which corresponds to a [[Hubble's law|Hubble distance]] of {{convert|11.82 ± 0.83|Mpc|Mly|abbr=on|lk=on|order=flip}}.<ref name="ned" /> However, 21 ''non redshift'' measurements give a distance of {{convert|7.244 ± 0.514|Mpc|Mly|abbr=on|order=flip}}.<ref name=ned-dist /> It was discovered on 30 June 1826 by Scottish astronomer [[James Dunlop]], observing from [[Parramatta]], Australia.<ref name=cseligman>{{Cite web | url=http://cseligman.com/text/atlas/ngc67.htm#6744 | title=NGC Objects: NGC 6700–6749 | access-date=14 February 2019 | website=cseligman.com | author=Seligman, Courtney}}</ref>

One of the largest spiral galaxies in the local universe, NGC 6744 is considered a [[Milky Way]] mimic in the immediate vicinity, displaying remarkable star formation, flocculent (fluffy) arms, and an elongated core.<ref>{{Cite web |title=Euclid's new image of spiral galaxy NGC 6744 |url=https://www.esa.int/ESA_Multimedia/Images/2024/05/Euclid_s_new_image_of_spiral_galaxy_NGC_6744 |access-date=2024-11-11 |website=www.esa.int |language=en}}</ref><ref name="Silva" /> It has at least one distorted companion galaxy [[(NGC 6744A)]] superficially similar to one of the [[Magellanic Clouds]].<ref name=ned-NGC6744A>{{cite web
  |title=NASA/IPAC Extragalactic Database
  |work=Results for NGC 6744A
  |url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+6744A&img_stamp=yes&extend=no
  |access-date=2010-06-19}}</ref>

NGC{{nbsp}}6744 is a [[Low-ionization_nuclear_emission-line_region|LINER]] galaxy, i.e., its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.<ref name = "Silva">{{cite journal | arxiv = 1807.02604| doi = 10.3847/1538-4357/aac6e3| doi-access = free| title = NGC 6744: A Nearby Milky Way Twin with a Very Low-luminosity AGN| date = 2018| last1 = Silva| first1 = Patrícia da| last2 = Steiner| first2 = J. E.| last3 = Menezes| first3 = R. B.| journal = The Astrophysical Journal| volume = 861| issue = 2| page = 83| bibcode = 2018ApJ...861...83D}}</ref> The galaxy has an [[active galactic nucleus]] (AGN) of low luminosity.<ref name="Silva" />

NGC 6744 lies within the [[Virgo Supercluster]].<ref name="fouqueetal1992">{{cite journal | author=P. Fouque | author2=E. Gourgoulhon | author3=P. Chamaraux | author4=G. Paturel| title=Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members | journal=Astronomy and Astrophysics Supplement | date=1992 | volume=93 | pages=211–233 | bibcode=1992A&AS...93..211F}}</ref><ref>{{Cite web|url=http://ned.ipac.caltech.edu/level5/Dev2/frames.html|title=Nearby Groups of Galaxies|website=ned.ipac.caltech.edu|access-date=2018-05-04}}</ref>

==Supernovae==
Two [[supernova]]e have been observed in NGC 6744:
* R. Martin and Berto Monard discovered SN 2005at ([[Type Ib and Ic supernovae|type&nbsp;Ic]], mag. 16) on 15 March 2005.<ref>{{cite journal | bibcode=2005IAUC.8496....1M| title=Supernovae 2005at and 2005au| last1=Martin| first1=R.| last2=Yamaoka| first2=H.| last3=Monard| first3=L. A. G.| last4=Africa| first4=S.| journal=International Astronomical Union Circular| date=2005| issue=8496| page=1 | url=http://www.cbat.eps.harvard.edu/iauc/08400/08496.html#Item1}}</ref><ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2005at | url=https://www.wis-tns.org/object/2005at | publisher = [[International_Astronomical_Union|IAU]] | access-date=13 December 2024}}</ref>
* [[BlackGEM]] discovered another [[Time-domain_astronomy|astronomical transient]], designated SN 2024vjm, on 13 September 2024.<ref>{{cite web | website=Transient Name Server | title=Discovery certificate for object 2024vjm | url=https://www.wis-tns.org/object/2024vjm/discovery-cert | publisher = [[International_Astronomical_Union|IAU]] | access-date=15 September 2024}}</ref> After initial [[Spectroscopy|Spectral analysis]], the star was classified as a ''peculiar'' [[nova]], but further observations showed the object to be a faint [[Type_Iax_supernova|type{{nbsp}}Iax]] supernova, likely the closest known of this type.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2024vjm | url=https://www.wis-tns.org/object/2024vjm | publisher = [[International_Astronomical_Union|IAU]] | access-date=15 September 2024}}</ref><ref>{{cite web | website=Transient Name Server | title=AstroNote 2024-258 | url=https://www.wis-tns.org/astronotes/astronote/2024-258 | publisher = [[International_Astronomical_Union|IAU]] | access-date=15 September 2024}}</ref><ref>{{cite web | website=Transient Name Server | title=AstroNote 2024-265 | url=https://www.wis-tns.org/astronotes/astronote/2024-265 | publisher = [[International_Astronomical_Union|IAU]] | access-date=20 September 2024}}</ref>

==Gallery==
<gallery>
File:Euclid’s new image of spiral galaxy NGC 6744 ESA497254.jpg|''[[Euclid_(spacecraft)|Euclid]]''{{'}}s view of spiral galaxy NGC 6744
File:NGC 6744-HST.png|The nucleus of NGC 6744 imaged by the [[Hubble Space Telescope]]
</gallery>

==See also==
* [[List of NGC objects (6001–7000)]]
* [[NGC 2336]] – another spiral galaxy of similar size and shape
* [[NGC 1232]]
* [[SPT0418-47]] – a spiral galaxy of similar size and shape when the universe was 1.4 billion years old
* [[UGC 12158]]
* [[UGC 6093]]
* [[Milky Way]]

==References==
{{reflist}}

==External links==
{{commons category}}
* {{Sky-Map.org}}
* [https://web.archive.org/web/20080721034305/http://www.aao.gov.au/images/captions/aatccd006.html NGC 6744, a Milky Way-like spiral galaxy]
* [http://www.spiegelteam.de/ngc6744.htm NGC 6744 (Pav)] {{Webarchive|url=https://web.archive.org/web/20110604125705/http://www.spiegelteam.de/ngc6744.htm |date=2011-06-04 }}
* [http://wise.ssl.berkeley.edu/gallery_NGC6744.html June 4, 2010 – A Sibling of the Milky Way] ([[Wide-field Infrared Survey Explorer|Wise]] image of NGC 6744)
* [http://www.eso.org/public/news/eso1118/ A spiral galaxy that resembles our Milky Way] (1 June 2011)
* {{cite web|last=Merrifield|first=Michael|title=NGC 6744 The Milky Way's Twin|url=http://www.sixtysymbols.com/videos/ngc6744.htm|work=Sixty Symbols|publisher=[[Brady Haran]] for the [[University of Nottingham]]}}
*{{APOD |date=May 31, 2018|title=NGC 6744 Close Up}}

{{NGC objects:6500-6999}}
{{Caldwell catalogue}}
{{Pavo (constellation)}}
{{Catalogs|NGC=6744}}

{{DEFAULTSORT:NGC 6744}}
[[Category:Virgo Supercluster]]
[[Category:Intermediate spiral galaxies]]
[[Category:Pavo (constellation)]]
[[Category:NGC objects|6744]]
[[Category:Principal Galaxies Catalogue objects|062836]]
[[Category:Caldwell objects|101b]]
[[Category:Astronomical objects discovered in 1826|18260630]]
[[Category:IRAS catalogue objects|19051-6357]]
[[Category:Discoveries by James Dunlop]]
[[Category:ESO objects|104- G 042]]

{{Spiral-galaxy-stub}}