# IC 4329A

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Galaxy in the constellation of centaurus

IC 4329A IC 4329A imaged by the Dark Energy Camera on the Víctor M. Blanco Telescope Observation data (J2000 epoch) Constellation Centaurus Right ascension 13h 49m 19s[1] Declination −30° 18′ 34.21″[2] Redshift 0.015207 Heliocentric radial velocity 4,515 kilometres per second[3] Distance 63.39±0.23 megaparsec Apparent magnitude (V) 11.5 Characteristics Type GX [S0-a] Notable features Seyfert galaxy Other designations PGC 49051, ESO 445-50, IRAS 13464-3003, IRAS F13464-3003, 2MASX J13491927-3018338, ESO-LV 445-0500, MCG-05-33-021, 1ES 1346-30.0, 1RXS J134919.0-301830, 6dFGS gJ134919.3-301834, NVSS J134919-301833, PSCz P13464-3003, RBS 1319, SGC 134628-3003.7, LEDA 49051, 2A 1347-300, 3A 1346-301, INTREF 579, 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 DR2 6175160320123081600[4]

**IC 4329A**, also commonly referred as [PGC](/source/Principal_Galaxies_Catalogue) 49051 is a [Seyfert galaxy](/source/Seyfert_galaxy) in the constellation of [Centaurus](/source/Centaurus). Its distance from [Earth](/source/Earth) is 206 million [light years](/source/Light-year). The declination of IC 4329A is approximately -30.2 degrees and was first discovered by [Wilson A. S.](/source/Andrew_Stephen_Wilson) & Penston, M. V. in 1979.[5]

## Characteristics

This galaxy was first described by using an X-ray [spectro-polarimetric analysis](/source/Spectro-Polarimetric_High-Contrast_Exoplanet_Research) as an extremely bright [Seyfert galaxy](/source/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](/source/Spiral_galaxy) close to [elliptical galaxy](/source/Elliptical_galaxy) IC 4329, which is the brightest galaxy inside a galaxy cluster in the [Centaurus](/source/Centaurus) region.[6] It has a [dust lane](/source/Dust_lane) displaying extreme [polarization](/source/Polarization_(waves)).[7]

Additionally, dust components in IC 4329A have been detected mainly in the [interstellar medium](/source/Interstellar_medium) of its host galaxy as well as its nuclear component located in the [active](/source/Active_galactic_nucleus) [torus](/source/Torus).[8]

The [supermassive black hole](/source/Supermassive_black_hole) in IC 4329A is estimated to be 6.8+1.2 −1.1 × 107 M☉.[9]

## 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.[10]

## Nearby galaxies

The closest galaxy next to **IC 4329A** is [IC 4329](https://en.wikipedia.org/w/index.php?title=IC_4329&action=edit&redlink=1) with the group of [IC 4327](https://en.wikipedia.org/w/index.php?title=IC_4327&action=edit&redlink=1), 5302, 5304, 5298, [PGC 159482](https://en.wikipedia.org/w/index.php?title=PGC_159482&action=edit&redlink=1) and [PGC 48950](https://en.wikipedia.org/w/index.php?title=PGC_48950&action=edit&redlink=1).[11]

## References

1. **[^](#cite_ref-1)** ["CzSkY"](https://www.czsky.eu/deepskyobject/IC4329A/info).

1. **[^](#cite_ref-2)** Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D6175160320123081600%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. **[^](#cite_ref-3)** Ingram, A.; et al. (2023). ["The X-ray polarisation of the Seyfert 1 galaxy IC 4329A"](https://doi.org/10.1093%2Fmnras%2Fstad2625). *Monthly Notices of the Royal Astronomical Society*. **525** (4): 5437. [arXiv](/source/ArXiv_(identifier)):[2305.13028](https://arxiv.org/abs/2305.13028). [Bibcode](/source/Bibcode_(identifier)):[2023MNRAS.525.5437I](https://ui.adsabs.harvard.edu/abs/2023MNRAS.525.5437I). [doi](/source/Doi_(identifier)):[10.1093/mnras/stad2625](https://doi.org/10.1093%2Fmnras%2Fstad2625).

1. **[^](#cite_ref-4)** ["Ic 4329A"](https://m.wikidata.org/wiki/Q3716785).

1. **[^](#cite_ref-5)** Wilson, A. S.; Penston, M. V. (1979). ["IC 4329A: The nearest quasar?"](https://adsabs.harvard.edu/full/1979ApJ...232..389W). *The Astrophysical Journal*. **232**: 389. [Bibcode](/source/Bibcode_(identifier)):[1979ApJ...232..389W](https://ui.adsabs.harvard.edu/abs/1979ApJ...232..389W). [doi](/source/Doi_(identifier)):[10.1086/157298](https://doi.org/10.1086%2F157298).

1. **[^](#cite_ref-6)** Wilson, A. S.; Penston, M. V. (1979). ["IC 4329A: The nearest quasar?"](https://ui.adsabs.harvard.edu/abs/1979ApJ...232..389W/abstract#:~:text=According%20to%20Disney%27s%20(1973)%20observations,the%20high%20H%2Dbeta%20luminosity). *The Astrophysical Journal*. **232**: 389. [Bibcode](/source/Bibcode_(identifier)):[1979ApJ...232..389W](https://ui.adsabs.harvard.edu/abs/1979ApJ...232..389W). [doi](/source/Doi_(identifier)):[10.1086/157298](https://doi.org/10.1086%2F157298).

1. **[^](#cite_ref-7)** Wolstencroft, Ramon D.; Done, C.J. (September 1995). ["Imaging polarimetry of the Seyfert galaxy IC 4329A"](https://academic.oup.com/mnras/article/276/2/460/998804). *Monthly Notices of the Royal Astronomical Society*. **276** (2): 460–466. [doi](/source/Doi_(identifier)):[10.1093/mnras/276.2.460](https://doi.org/10.1093%2Fmnras%2F276.2.460).

1. **[^](#cite_ref-8)** Mehdipour, Missagh; Costantini, Elisa (2018-11-01). ["Probing the nature and origin of dust in the reddened quasar IC 4329A with global modelling from X-ray to infrared"](https://www.aanda.org/articles/aa/full_html/2018/11/aa33706-18/aa33706-18.html#S14). *Astronomy & Astrophysics*. **619**: A20. [arXiv](/source/ArXiv_(identifier)):[1808.04628](https://arxiv.org/abs/1808.04628). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...619A..20M](https://ui.adsabs.harvard.edu/abs/2018A&A...619A..20M). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201833706](https://doi.org/10.1051%2F0004-6361%2F201833706). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-9)** Bentz, Misty C.; Onken, Christopher A.; Street, Rachel; Valluri, Monica (2023-02-01). ["Reverberation Mapping of IC 4329A"](https://doi.org/10.3847%2F1538-4357%2Facab62). *The Astrophysical Journal*. **944** (1): 29. [arXiv](/source/ArXiv_(identifier)):[2212.05954](https://arxiv.org/abs/2212.05954). [Bibcode](/source/Bibcode_(identifier)):[2023ApJ...944...29B](https://ui.adsabs.harvard.edu/abs/2023ApJ...944...29B). [doi](/source/Doi_(identifier)):[10.3847/1538-4357/acab62](https://doi.org/10.3847%2F1538-4357%2Facab62). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-10)** Ganguly, Piyali; Rani, Priyanka; Dewangan, Gulab C. (2025). ["AstroSat/UVIT Far- and Near-UV Deep Field Around IC 4329A"](https://doi.org/10.3847%2F1538-3881%2Fada768). *The Astronomical Journal*. **169** (3): 188. [arXiv](/source/ArXiv_(identifier)):[2505.15736v1](https://arxiv.org/abs/2505.15736v1). [Bibcode](/source/Bibcode_(identifier)):[2025AJ....169..188G](https://ui.adsabs.harvard.edu/abs/2025AJ....169..188G). [doi](/source/Doi_(identifier)):[10.3847/1538-3881/ada768](https://doi.org/10.3847%2F1538-3881%2Fada768).

1. **[^](#cite_ref-11)** ["CzSkY"](https://www.czsky.eu/deepskyobject/IC4329A/chart?ra=3.61859841036506&dec=-0.5290092962794812&fsz=80&splitview=true).

## External links

- [https://ui.adsabs.harvard.edu](https://ui.adsabs.harvard.edu)

- [https://www.czsky.eu/deepskyobject/IC4329A/info](https://www.czsky.eu/deepskyobject/IC4329A/info)

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