NGC 5398

{{Short description|Galaxy in the constellation Centaurus}} {{Infobox galaxy | name = NGC 5398 | image = NGC5398 - HST - Potw1737a.tiff | image_size = 300px | upright = | caption = NGC 5398 imaged by the [[Hubble Space Telescope]]; Tol 89 is the pale red patch to the lower left of center | alt = | epoch = [[J2000]] | pronounce = | constellation name = [[Centaurus (constellation)|Centaurus]] | ra = {{RA|14|01|21.555}}<ref name=Skrutskie_et_al_2006/> | dec = {{DEC|-33|03|49.62}}<ref name=Skrutskie_et_al_2006/> | z = | h_radial_v = {{val|1219|u=km/s|fmt=commas}}<ref name=Tully_et_al_2016/> | gal_v = {{val|1085|u=km/s|fmt=commas}}<ref name=Tully_et_al_2016/> | dist_pc = | dist_ly = {{cvt|8.5114|Mpc|Mly|1|adj=ri1|order=flip|lk=on}}<ref name=Lianou_et_al_2019/> | group_cluster = | type = SB(rs)dm<ref name="ned"/> | mass =  | mass_light_ratio =  | size =  | stars = | appmag_v = 12.6<ref name="ned" /> | appmag_b = | absmag_v = | size_v = 2.8{{prime}} × 1.7{{prime}}<ref name="ned" /> (D<sub>25</sub>) | half_light_radius_pc =  | half_light_radius_arcminsec =  | h1_scale_length_pc =  | h1_scale_length_arcminsec =  | xray_radius_pc =  | xray_radius_arcminsec =  | notes = | names = {{odlist | NGC=5398 | UGCA=379 | PGC=49923 | IRAS=13584-3249 | LEDA=49923 | MCG=-05-33-037 }}<ref name=SIMBAD/><ref name="ned" /> | references = }}

'''NGC 5398''' is a [[barred spiral galaxy]] in the southern [[constellation]] of [[Centaurus (constellation)|Centaurus]]. It was discovered June 3, 1836 by [[John Herschel]].<ref name=Seligman/> Distance estimates range from {{val|5.39|u=Mpc}} to {{val|18.30|u=Mpc}}. The [[tip of the red-giant branch]] method yields a distance of {{val|11.6|u=Mpc}},<ref name=McQuinn_et_al_2017/> while the [[Tully–Fisher relation]] shows values of around {{val|8.5|u=Mpc}}.<ref name=Lianou_et_al_2019/> It is receding with a heliocentric [[radial velocity]] of {{val|1219|u=km/s|fmt=commas}}.<ref name=Tully_et_al_2016/>

The [[Galaxy morphological classification|morphological class]] of NGC 5398 is SB(rs)dm,<ref name=Buta1995/> indicating this is a spiral galaxy with an inner bar (SB) and incomplete ring (rs) structures, plus broken, irregular [[spiral arm]]s (dm). The [[galactic plane]] is inclined at an angle of 53° to the line of sight from the Earth. The oval outline of the disk has an [[angular size]] of {{nowrap|2.8{{prime}} × 1.7{{prime}}}} at a limiting magnitude of 25, with the major axis aligned along a [[position angle]] of 172°.<ref name=Linden_et_al_2020/>

At the southwestern end of the bar lies a giant [[H II region]] (GHR) designated Tol 89. It spans a region of {{nowrap|1.7 × 1.2 kpc}} with an absolute magnitude of −14.8 in the [[UBV photometric system|B (blue) band]], making it "one of the most impressive GHRs known". This is the only large site in NGC 5398 that is undergoing [[star formation]], and it suggests that NGC 5398 is engaged in some form of [[Interacting galaxy|interaction]].<ref name=Sidoli_et_al_2006/><ref name=Johnson_et_al_2002/><ref name=Durret_et_al_1985/>

==See also== * [[NGC 4618]] - ''a similar galaxy'' * [[NGC 4625]] - ''a similar galaxy''

==References== <references> <ref name=SIMBAD>{{cite simbad | title=NGC 5398 | access-date=2021-12-27 }}</ref>

<ref name=Seligman>{{cite web | title=NGC Objects: NGC 5350 - 5399 | first=Courtney | last=Seligman | work=Celestial Atlas | url=https://cseligman.com/text/atlas/ngc53a.htm#5398 | access-date=2021-12-17 }}</ref>

<ref name="ned">{{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 5398 | url=http://nedwww.ipac.caltech.edu/ | access-date=2007-03-27}}</ref>

<ref name=Skrutskie_et_al_2006>{{cite journal | title=The Two Micron All Sky Survey (2MASS) | display-authors=1 | last1=Skrutskie | first1=Michael F. | last2=Cutri | first2=Roc M. | last3=Stiening | first3=Rae | last4=Weinberg | first4=Martin D. | last5=Schneider | first5=Stephen E. | last6=Carpenter | first6=John M. | last7=Beichman | first7=Charles A. | last8=Capps | first8=Richard W. | last9=Chester | first9=Thomas | last10=Elias | first10=Jonathan H. | last11=Huchra | first11=John P. | last12=Liebert | first12=James W. | last13=Lonsdale | first13=Carol J. | last14=Monet | first14=David G. | last15=Price | first15=Stephan | last16=Seitzer | first16=Patrick | last17=Jarrett | first17=Thomas H. | last18=Kirkpatrick | first18=J. Davy | last19=Gizis | first19=John E. | last20=Howard | first20=Elizabeth V. | last21=Evans | first21=Tracey E. | last22=Fowler | first22=John W. | last23=Fullmer | first23=Linda | last24=Hurt | first24=Robert L. | last25=Light | first25=Robert M. | last26=Kopan | first26=Eugene L. | last27=Marsh | first27=Kenneth A. | last28=McCallon | first28=Howard L. | last29=Tam | first29=Robert | last30=Van Dyk | first30=Schuyler D. | last31=Wheelock | first31=Sherry L. | journal=The Astronomical Journal | date=1 February 2006 |volume=131 | issue=2 |pages=1163–1183 | doi=10.1086/498708 | issn=0004-6256 | bibcode=2006AJ....131.1163S | s2cid=18913331 | doi-access=free }}</ref>

<ref name=Lianou_et_al_2019>{{cite journal | title=Dust properties and star formation of approximately a thousand local galaxies | display-authors=1 | last1=Lianou | first1=S. | last2=Barmby | first2=P. | last3=Mosenkov | first3=A. A. | last4=Lehnert | first4=M. | last5=Karczewski | first5=O. | journal=Astronomy & Astrophysics | volume=631 | id=A38 | pages=19 | date=November 2019 | doi=10.1051/0004-6361/201834553 | arxiv=1906.02712 | bibcode=2019A&A...631A..38L | s2cid=174801441 }}</ref>

<ref name=Tully_et_al_2016>{{cite journal | title=Cosmicflows-3 | display-authors=1 | last1=Tully | first1=R. Brent | last2=Courtois | first2=Hélène M. | last3=Sorce | first3=Jenny G. | journal=The Astronomical Journal | volume=152 | issue=2 | id=50 | pages=21 | date=2016 | doi=10.3847/0004-6256/152/2/50 | bibcode=2016AJ....152...50T | arxiv=1605.01765 | s2cid=250737862 | doi-access=free }}</ref>

<ref name=McQuinn_et_al_2017>{{cite journal | title=Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398 | display-authors=1 | last1=McQuinn | first1=Kristen B. W. | last2=Skillman | first2=Evan D. | last3=Dolphin | first3=Andrew E. | last4=Berg | first4=Danielle | last5=Kennicutt | first5=Robert | journal=The Astronomical Journal | volume=154 | issue=2 | id=51 | pages=13 | date=August 2017 | doi=10.3847/1538-3881/aa7aad | arxiv=1706.06586 | bibcode=2017AJ....154...51M | s2cid=119449804 | doi-access=free }}</ref>

<ref name=Sidoli_et_al_2006>{{cite journal | title=The massive star population in the giant HII region Tol89 in NGC 5398 | display-authors=1 | last1=Sidoli | first1=Fabrizio | last2=Smith | first2=Linda J. | last3=Crowther | first3=Paul A. | journal=Monthly Notices of the Royal Astronomical Society | volume=370 | issue=2 | pages=799–818 | date=August 2006 | doi=10.1111/j.1365-2966.2006.10504.x | doi-access=free | arxiv=astro-ph/0605100 | bibcode=2006MNRAS.370..799S | s2cid=117771119 }}</ref>

<ref name=Johnson_et_al_2002>{{cite journal | title=Searching for Embedded Super Star Clusters in IC4662, NGC1705, and NGC5398 | display-authors=1 | last1=Johnson | first1=K. E. | last2=Indebetouw | first2=R. | last3=Pisano | first3= D. J. | journal=Bulletin of the American Astronomical Society | id=81.02 | volume=34 | pages=1238 | date=December 2002 | bibcode=2002AAS...201.8102J }}</ref>

<ref name=Durret_et_al_1985>{{cite journal | title=Gas and star content and spatial distribution in the giant extragalactic H II region TOL 89 | display-authors=1 | last1=Durret | first1=F. | last2=Bergeron | first2=J. | last3=Boksenberg | first3=A. | journal=Astronomy and Astrophysics | volume=143 | pages=347–354 | date=February 1985 | bibcode=1985A&A...143..347D }}</ref>

<ref name=Buta1995>{{cite journal | title=The Catalog of Southern Ringed Galaxies | last=Buta | first=R. | journal=Astrophysical Journal Supplement | volume=96 | page=39 | date=January 1995 | doi=10.1086/192113 | bibcode=1995ApJS...96...39B }}</ref>

<ref name=Linden_et_al_2020>{{cite journal | title=The Star Formation in Radio Survey: 3-33 GHz Imaging of Nearby Galaxy Nuclei and Extranuclear Star-forming Regions | last1=Linden | first1=S. T. | last2=Murphy | first2=E. J. | last3=Dong | first3=D. | last4=Momjian | first4=E. | last5=Kennicutt | first5=R. C. Jr. | last6=Meier | first6=D. S. | last7=Schinnerer | first7=E. | last8=Turner | first8=J. L. | display-authors=1 | journal=The Astrophysical Journal Supplement Series | volume=248 | issue=2 | id=25 | date=June 2020 | page=25 | doi=10.3847/1538-4365/ab8a4d | arxiv=2004.10230 | bibcode=2020ApJS..248...25L | s2cid=216056506 | doi-access=free }}</ref> </references>

==External links== *{{commons category-inline}} * [https://web.archive.org/web/20070621021913/http://www.galex.caltech.edu/popups/gallery-NGC5398.html GALEX page on NGC 5398]

{{DEFAULTSORT:NGC 5398}} [[Category:Barred spiral galaxies]] [[Category:Centaurus]] [[Category:NGC objects|5398]] [[Category:Principal Galaxies Catalogue objects|49923]] [[Category:UGCA objects]]