{{Short description|Galaxy in the constellation of centaurus}} {{Infobox galaxy | name = IC 4329A | image = IC 4329A imaged by the Dark Energy Camera (DECam) on the Víctor M. Blanco 4-meter Telescope.png | caption = IC 4329A imaged by the [[Dark Energy Survey#DECam|Dark Energy Camera]] on the [[Víctor M. Blanco Telescope]] | epoch = [[J2000]] | type = GX [S0-a] | ra={{RA|13|49|19|3}}<ref>{{cite web | url=https://www.czsky.eu/deepskyobject/IC4329A/info | title=CzSkY }}</ref> | dec= {{DEC|-30|18|34.21}}<ref>{{cite Gaia DR3|6175160320123081600}}</ref>|dist_ly=63.39±0.23 megaparsec|z=0.015207|h_radial_v=4,515 kilometres per second<ref>{{cite journal | arxiv=2305.13028 | last1=Ingram | first1=A. | last2=Ewing | first2=M. | last3=Marinucci | first3=A. | last4=Tagliacozzo | first4=D. | last5=Rosario | first5=D. J. | last6=Veledina | first6=A. | last7=Kim | first7=D. E. | last8=Marin | first8=F. | last9=Bianchi | first9=S. | last10=Poutanen | first10=J. | last11=Matt | first11=G. | last12=Marshall | first12=H. L. | last13=Ursini | first13=F. | last14=De Rosa | first14=A. | last15=Petrucci | first15=P-O. | last16=Madejski | first16=G. | last17=Barnouin | first17=T. | last18=Di Gesu | first18=L. | last19=Dovvciak | first19=M. | last20=Gianolli | first20=V. E. | last21=Krawczynski | first21=H. | last22=Loktev | first22=V. | last23=Middei | first23=R. | last24=Podgorny | first24=J. | last25=Puccetti | first25=S. | last26=Ratheesh | first26=A. | last27=Soffitta | first27=P. | last28=Tombesi | first28=F. | last29=Ehlert | first29=S. R. | last30=Massaro | first30=F. | title=The X-ray polarisation of the Seyfert 1 galaxy IC 4329A | journal=Monthly Notices of the Royal Astronomical Society | date=2023 | volume=525 | issue=4 | page=5437 | doi=10.1093/mnras/stad2625 | doi-access=free | bibcode=2023MNRAS.525.5437I | display-authors=1 }}</ref>|appmag_v=11.5|constellation name=[[Centaurus]]|notes=[[Seyfert galaxy]]|names=[[Principal Galaxies Catalogue|PGC]] 49051, [[European Southern Observatory|ESO]] 445-50, [[Infrared Astronomical Satellite|IRAS]] 13464-3003, [[Infrared Astronomical Satellite |IRAS]] F13464-3003, [[2MASS|2MASX]] J13491927-3018338, [[European Southern Observatory|ESO]]-LV 445-0500, [[Morphological Catalogue of Galaxies|MCG]]-05-33-021, 1ES 1346-30.0, [[1RXS]] J134919.0-301830, [[6dF Galaxy Survey|6dFGS]] gJ134919.3-301834, [[NRAO VLA Sky Survey|NVSS]] J134919-301833, [[Point Source Catalog|PSCz]] P13464-3003, RBS 1319, [[Southern Galaxy Catalogue|SGC]] 134628-3003.7, [[Lyon-Meudon Extragalactic Database|LEDA]] 49051, 2A 1347-300, 3A 1346-301, INTREF 579, [[Rossi X-ray Timing Explorer|XSS]] J13492-3020, [DML87] 679, [HB91] 1346-300, FLASH J134919.31-301833.1, PBC J1349.2-3018, MAXI J1349-302, 2MAXI J1349-302 and [[Gaia catalogues|Gaia]] DR2 6175160320123081600<ref>{{cite web | url=https://m.wikidata.org/wiki/Q3716785 | title=Ic 4329A }}</ref>}} '''IC 4329A''', also commonly referred as [[Principal Galaxies Catalogue|PGC]] 49051 is a [[Seyfert galaxy]] in the constellation of [[Centaurus]]. Its distance from [[Earth]] is 206 million [[Light-year|light years]]. The declination of IC 4329A is approximately -30.2 degrees and was first discovered by [[Andrew Stephen Wilson|Wilson A. S.]] & Penston, M. V. in 1979.<ref>{{cite journal | url=https://adsabs.harvard.edu/full/1979ApJ...232..389W | bibcode=1979ApJ...232..389W | title=IC 4329A: The nearest quasar? | last1=Wilson | first1=A. S. | last2=Penston | first2=M. V. | journal=The Astrophysical Journal | date=1979 | volume=232 | page=389 | doi=10.1086/157298 }}</ref>
==Characteristics== This galaxy was first described by using an X-ray [[Spectro-Polarimetric High-Contrast Exoplanet Research|spectro-polarimetric analysis]] as an extremely bright [[Seyfert galaxy]] on account of the width of H-alpha (13,000 km/sec) and the high H-beta luminosity. This galaxy is described as an edge-on [[spiral galaxy]] close to [[elliptical galaxy]] IC 4329, which is the brightest galaxy inside a galaxy cluster in the [[Centaurus]] region.<ref>{{cite journal | url=https://ui.adsabs.harvard.edu/abs/1979ApJ...232..389W/abstract#:~:text=According%20to%20Disney%27s%20(1973)%20observations,the%20high%20H%2Dbeta%20luminosity | bibcode=1979ApJ...232..389W | doi=10.1086/157298 | title=IC 4329A: The nearest quasar? | last1=Wilson | first1=A. S. | last2=Penston | first2=M. V. | journal=The Astrophysical Journal | date=1979 | volume=232 | page=389 }}</ref> It has a [[dust lane]] displaying extreme [[Polarization (waves)|polarization]].<ref>{{Cite journal |last1=Wolstencroft |first1=Ramon D. |last2=Done |first2=C.J. |date=September 1995 |title=Imaging polarimetry of the Seyfert galaxy IC 4329A |url=https://academic.oup.com/mnras/article/276/2/460/998804 |journal=Monthly Notices of the Royal Astronomical Society |volume=276 |issue=2 |pages=460–466|doi=10.1093/mnras/276.2.460 |doi-access=free }}</ref>
Additionally, dust components in IC 4329A have been detected mainly in the [[interstellar medium]] of its host galaxy as well as its nuclear component located in the [[Active galactic nucleus|active]] [[torus]].<ref>{{Cite journal |last1=Mehdipour |first1=Missagh |last2=Costantini |first2=Elisa |date=2018-11-01 |title=Probing the nature and origin of dust in the reddened quasar IC 4329A with global modelling from X-ray to infrared |url=https://www.aanda.org/articles/aa/full_html/2018/11/aa33706-18/aa33706-18.html#S14 |journal=Astronomy & Astrophysics |language=en |volume=619 |pages=A20 |doi=10.1051/0004-6361/201833706 |arxiv=1808.04628 |bibcode=2018A&A...619A..20M |issn=0004-6361}}</ref>
The [[supermassive black hole]] in IC 4329A is estimated to be 6.8{{±|1.2|1.1}} × 10<sup>7</sup> M<sub>☉</sub>.<ref>{{Cite journal |last1=Bentz |first1=Misty C. |last2=Onken |first2=Christopher A. |last3=Street |first3=Rachel |last4=Valluri |first4=Monica |date=2023-02-01 |title=Reverberation Mapping of IC 4329A |journal=The Astrophysical Journal |volume=944 |issue=1 |pages=29 |doi=10.3847/1538-4357/acab62 |doi-access=free |arxiv=2212.05954 |bibcode=2023ApJ...944...29B |issn=0004-637X}}</ref>
==Ultraviolet Imaging with AstroSat/UVIT== In 2017, the region around IC 4329A was observed using the Ultra-Violet Imaging Telescope (UVIT) aboard AstroSat. The observations, taken in near-ultraviolet (NUV) and far-ultraviolet (FUV) bands, revealed 4,437 sources in NUV and 456 in FUV.<ref>{{cite journal|last1=Ganguly |first1=Piyali |last2=Rani |first2=Priyanka |last3=Dewangan |first3=Gulab C. |title=AstroSat/UVIT Far- and Near-UV Deep Field Around IC 4329A|journal=The Astronomical Journal |date=2025 |volume=169 |issue=3 |page=188 |doi=10.3847/1538-3881/ada768 |doi-access=free |arxiv=2505.15736v1 |bibcode=2025AJ....169..188G }}</ref>
==Nearby galaxies== The closest galaxy next to '''IC 4329A''' is [[IC 4329]] with the group of [[IC 4327]], 5302, 5304, 5298, [[PGC 159482]] and [[PGC 48950]].<ref>{{cite web | url=https://www.czsky.eu/deepskyobject/IC4329A/chart?ra=3.61859841036506&dec=-0.5290092962794812&fsz=80&splitview=true | title=CzSkY }}</ref> ==References== {{Reflist}} == External links == * https://ui.adsabs.harvard.edu * https://www.czsky.eu/deepskyobject/IC4329A/info {{galaxy-stub}} [[Category:Seyfert galaxies]] [[Category:Spiral galaxies]] [[Category:IC objects|4329]] [[Category:Principal Galaxies Catalogue objects|49051]] [[Category:Astronomical objects discovered in 1979]] [[Category:Centaurus]]