NGC 2427

{{short description|Galaxy in the constellation Puppis}}

{{Infobox galaxy

| name = NGC 2427

| image = NGC 2427 hst 09042 31 R814GB450.png

| caption = NGC 2427 imaged by the Hubble Space Telescope

| epoch = J2000

| type = SAB(s)c pec {{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 2427

| url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+2427

| access-date=2016-01-18 }}

| ra = {{RA|07|36|28.035}}

| dec = {{DEC|-47|38|11.05}}

| dist_ly = 35.3 ± 4.8 Mly (10.8 ± 1.5 Mpc)

| z = 0.003242 ± 0.000010

| h_radial_v = 972 ± 3 km/s

| appmag_v = 11.6 {{cite web |title=Revised NGC Data for NGC 2427 |url=http://spider.seds.org/ngc/revngcic.cgi?NGC2427 |website=spider.seds.org |access-date=25 November 2018}}

| size_v = 5.2{{prime}} × 2.2{{prime}}

| size = ~{{convert|16.3|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}

| constellation name = Puppis

| notes =

| names = ESO 208- G 027, IRAS 07350-4731, PGC 21375

}}

NGC 2427 is a barred spiral galaxy located in the constellation Puppis. It is located at a distance of about 35 million light years from Earth, which, given its apparent dimensions, means that NGC 2427 is about 50,000 light years across. It was discovered by John Herschel on March 1, 1835.{{cite web |last1=Seligman |first1=Courtney |title=NGC 2427 |url=https://cseligman.com/text/atlas/ngc24.htm#2427 |website=Celestial Atlas |access-date=19 November 2018}}

NGC 2427 has a bright short bar and two main spiral arms. The arms are asymmetric and of low surface brightness and feature many knots and HII regions the largest of which are about one arcsecond across.Corwin, H. G.; de Vaucouleurs, A.; de Vaucouleurs, G (1985) Southern Galaxy Catalogue. University of Texas{{cite book |author1=de Vaucouleurs, Gerard Henri |author2=de Vaucouleurs, Antoinette |author3=Shapley, Harlow |title=Reference catalogue of bright galaxies |date=1964 |publisher = University of Texas Press | location = Austin |bibcode=1964rcbg.book.....D}}{{cite journal |last1=Sandage |first1=A. |last2=Brucato |first2=R. |title=The Las Campanas survey of bright southern galaxies. II - New classifications for 153 systems |journal=The Astronomical Journal |date=April 1979 |volume=84 |pages=472 |doi=10.1086/112440|bibcode=1979AJ.....84..472S }} The total star formation rate is estimated to be 1.1 {{solar mass}} per year.{{cite journal |last1=Parkash |first1=Vaishali |last2=Brown |first2=Michael J. I. |last3=Jarrett |first3=T. H. |last4=Bonne |first4=Nicolas J. |title=Relationships between Hi Gas Mass, Stellar Mass, and the Star Formation Rate of HICAT+WISE (H i-WISE) Galaxies |journal=The Astrophysical Journal |date=1 September 2018 |volume=864 |issue=1 |pages=40 |doi=10.3847/1538-4357/aad3b9 |doi-access=free |bibcode=2018ApJ...864...40P |url=https://cdsarc.cds.unistra.fr/viz-bin/nph-Cat/txt?J/ApJ/864/40/table8.dat.gz|arxiv=1807.06246 }} When observed in H-alpha the bar is well defined and narrow and appears about one arcminute long across the galactic bulge. Many faint HII regions are visible in the inner and extended eastern disk of the galaxy. As the galaxy lies near the galactic plane and is seen in high inclination it is difficult to trace the spiral arms in H-alpha.{{cite journal |last1=Ryder |first1=Stuart D. |last2=Dopita |first2=Michael A. |title=An H-alpha atlas of nearby southern spiral galaxies |journal=The Astrophysical Journal Supplement Series |date=October 1993 |volume=88 |pages=415 |doi=10.1086/191827|bibcode=1993ApJS...88..415R }} The nucleus is very small and faint and hosts a nuclear star cluster which is 3.2 arcseconds across.{{cite journal |last1=Georgiev |first1=Iskren Y. |last2=Böker |first2=Torsten |last3=Leigh |first3=Nathan |last4=Lützgendorf |first4=Nora |last5=Neumayer |first5=Nadine |title=Masses and scaling relations for nuclear star clusters, and their co-existence with central black holes |journal=Monthly Notices of the Royal Astronomical Society |date=1 April 2016 |volume=457 |issue=2 |pages=2122–2138 |doi=10.1093/mnras/stw093 |doi-access=free |url=https://cdsarc.cds.unistra.fr/viz-bin/nph-Cat/txt?J/MNRAS/457/2122/tablea1.dat|arxiv=1601.02613 }}

NGC 2427 is a member of a galaxy group which also includes the galaxies NGC 2502, ESO 208- G 021, and ESO 209- G 009.{{cite journal |last1=Crook |first1=Aidan C. |last2=Huchra |first2=John P. |last3=Martimbeau |first3=Nathalie |last4=Masters |first4=Karen L. |last5=Jarrett |first5=Tom |last6=Macri |first6=Lucas M. |title=Groups of Galaxies in the Two Micron All Sky Redshift Survey |journal=The Astrophysical Journal |date=February 2007 |volume=655 |issue=2 |pages=790–813 |doi=10.1086/510201 |arxiv=astro-ph/0610732 |bibcode=2007ApJ...655..790C |url=https://cdsarc.cds.unistra.fr/viz-bin/nph-Cat/txt?J/ApJ/655/790/table10.dat.gz}}