# Abell 2009 BCG

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Brightest cluster galaxy in the constellation Boötes

Abell 2009 BCG SDSS image of Abell 2009 BCG Observation data (J2000.0 epoch) Constellation Boötes Right ascension 15h 00m 19.52s[1] Declination +21° 22′ 09.87″[1] Redshift 0.151928[1] Heliocentric radial velocity 45,547 ± 22 km/s[1] Distance 2,213.6 ± 155.0 Mly (678.70 ± 47.51 Mpc)[1] Group or cluster Abell 2009 magnitude (J) 13.89[1] magnitude (H) 12.74[1] Characteristics Type BrCIG[1] Size ~591,000 ly (181.3 kpc) (estimated)[1] Other designations 2MASX J15001950+2122108, Abell 2009:[CAC2009] BCM, LEDA 140447, OGC 0698, MaxBCG J225.08133+21.36941 BCG, RX J1500.3+2122:[BEV98] 010[1]

**Abell 2009 BCG** (short for **Abell 2009 Brightest Cluster Galaxy**) is a massive [elliptical galaxy](/source/Elliptical_galaxy) residing as the [brightest cluster galaxy](/source/Brightest_cluster_galaxy) (BCG) of the [galaxy cluster](/source/Galaxy_cluster), Abell 2009.[2] The [redshift](/source/Redshift) of the galaxy is (z) 0.151[1] and it was first discovered by [astronomers](/source/Astronomer) in July 1999, who observed [emission lines](/source/Spectral_line) in its [optical spectrum](/source/Visible_spectrum).[3]

## Description

Abell 2009 BCG is the dominant galaxy of Abell 2009.[3] The central nucleus of the BCG is found to be [active](/source/Active_galactic_nucleus) and it has been classified as a [Fanaroff-Riley](/source/Fanaroff%E2%80%93Riley_classification) Class Type I [radio galaxy](/source/Radio_galaxy) based on radio imaging made with the [Very Large Array](/source/Very_Large_Array) (VLA) at 1.5 [GHz](/source/Hertz) [frequencies](/source/Frequency). It has a resolved radio core and a pair of butterfly-shaped [radio lobes](/source/Radio_galaxy) 17 kiloparsecs in length. Both of the lobes are orientated from the northwest direction towards the southeast direction.[2]

The total radio [flux](/source/Flux) [density](/source/Density) of the BCG is estimated to be 23 ± 1.0 [mJy](/source/Jansky) with radio power being calculated as 1.45 ± 0.06 × 1024 W Hz-1.[2] The radio core flux density at 10 GHz frequencies is 3.3 ± 1.4 mJy, with the steep index [spectrum](/source/Spectrum) being 1.81 ± 0.05.[4] The emission is associated with another radio galaxy in the cluster, located 50 arcseconds away from the BCG.[2]

The BCG has an elliptical appearance according to [Hubble Space Telescope](/source/Hubble_Space_Telescope) (HST) imaging data.[5] The [supermassive black hole](/source/Supermassive_black_hole) lying in the center of the BCG is estimated to be 9.74 ± 0.08 [Mʘ](/source/Solar_mass) based on a calculation of the [fundamental plane](/source/Fundamental_plane_(elliptical_galaxies)) relation with the total [stellar mass](/source/Stellar_mass) of 12.17 ± 0.04 Mʘ.[6] The [infrared](/source/Infrared) [luminosity](/source/Luminosity) of the BCG has been calculated as less than 1.0 × 1044 erg s-1, making it somehow less luminous compared to others.[7] A study published in 2024, has found the BCG is offset from the X-ray center by about 7 kiloparsecs.[8]

## References

1. ^ [***a***](#cite_ref-ned_1-0) [***b***](#cite_ref-ned_1-1) [***c***](#cite_ref-ned_1-2) [***d***](#cite_ref-ned_1-3) [***e***](#cite_ref-ned_1-4) [***f***](#cite_ref-ned_1-5) [***g***](#cite_ref-ned_1-6) [***h***](#cite_ref-ned_1-7) [***i***](#cite_ref-ned_1-8) [***j***](#cite_ref-ned_1-9) [***k***](#cite_ref-ned_1-10) ["NED Search results for Abell 2009 BCG (LEDA 140447)"](https://ned.ipac.caltech.edu/byname?objname=LEDA+140447&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1). *NASA/IPAC Extragalactic Database*. Retrieved 2026-05-13.

1. ^ [***a***](#cite_ref-:0_2-0) [***b***](#cite_ref-:0_2-1) [***c***](#cite_ref-:0_2-2) [***d***](#cite_ref-:0_2-3) Fornasiero, I.; Ubertosi, F.; Gitti, M. (March 2025). "Investigating AGN feedback in H*α*-luminous galaxy clusters: First *Chandra* X-ray analysis of Abell 2009". *Astronomy & Astrophysics*. **695**: A265. [arXiv](/source/ArXiv_(identifier)):[2503.07781](https://arxiv.org/abs/2503.07781). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202453315](https://doi.org/10.1051%2F0004-6361%2F202453315). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. ^ [***a***](#cite_ref-:1_3-0) [***b***](#cite_ref-:1_3-1) Crawford, C. S.; Allen, S. W.; Ebeling, H.; Edge, A. C.; Fabian, A. C. (1999-07-11). ["The ROSAT Brightest Cluster Sample -- III. Optical spectra of the central cluster galaxies"](https://doi.org/10.1046%2Fj.1365-8711.1999.02583.x). *Monthly Notices of the Royal Astronomical Society*. **306** (4): 857–896. [arXiv](/source/ArXiv_(identifier)):[astro-ph/9903057](https://arxiv.org/abs/astro-ph/9903057). [doi](/source/Doi_(identifier)):[10.1046/j.1365-8711.1999.02583.x](https://doi.org/10.1046%2Fj.1365-8711.1999.02583.x). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-4)** Hogan, M. T.; Edge, A. C.; Hlavacek-Larrondo, J.; Grainge, K. J. B.; Hamer, S. L.; Mahony, E. K.; Russell, H. R.; Fabian, A. C.; McNamara, B. R.; Wilman, R. J. (2015-10-21). ["A Comprehensive Study of the Radio Properties of Brightest Cluster Galaxies"](https://doi.org/10.1093%2Fmnras%2Fstv1517). *Monthly Notices of the Royal Astronomical Society*. **453** (2): 1201–1222. [arXiv](/source/ArXiv_(identifier)):[1507.03019](https://arxiv.org/abs/1507.03019). [doi](/source/Doi_(identifier)):[10.1093/mnras/stv1517](https://doi.org/10.1093%2Fmnras%2Fstv1517). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-5)** Smith, Graham P.; Khosroshahi, Habib G.; Dariush, A.; Sanderson, A. J. R.; Ponman, T. J.; Stott, J. P.; Haines, C. P.; Egami, E.; Stark, D. P. (2010-10-06). ["LoCuSS: connecting the dominance and shape of brightest cluster galaxies with the assembly history of massive clusters"](https://doi.org/10.1111%2Fj.1365-2966.2010.17311.x). *Monthly Notices of the Royal Astronomical Society*. **409** (1): 169–183. [arXiv](/source/ArXiv_(identifier)):[1007.2196](https://arxiv.org/abs/1007.2196). [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2010.17311.x](https://doi.org/10.1111%2Fj.1365-2966.2010.17311.x). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-6)** Phipps, Frederika; Bogdán, Ákos; Lovisari, Lorenzo; Kovács, Orsolya E.; Volonteri, Marta; Dubois, Yohan (2019-04-20). ["Expanding the Sample: The Relationship between the Black Hole Mass of BCGs and the Total Mass of Galaxy Clusters"](https://doi.org/10.3847%2F1538-4357%2Fab107c). *The Astrophysical Journal*. **875** (2): 141. [doi](/source/Doi_(identifier)):[10.3847/1538-4357/ab107c](https://doi.org/10.3847%2F1538-4357%2Fab107c). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-7)** O’Dea, Christopher P.; Baum, Stefi A.; Privon, George; Noel-Storr, Jacob; Quillen, Alice C.; Zufelt, Nicholas; Park, Jaehong; Edge, Alastair; Russell, Helen; Fabian, Andrew C.; Donahue, Megan; Sarazin, Craig L.; McNamara, Brian; Bregman, Joel N.; Egami, Eiichi (May 2008). "An Infrared Survey of Brightest Cluster Galaxies. I.". *The Astrophysical Journal*. **681** (2): 1035–1045. [arXiv](/source/ArXiv_(identifier)):[0711.1118](https://arxiv.org/abs/0711.1118). [doi](/source/Doi_(identifier)):[10.1086/588212](https://doi.org/10.1086%2F588212). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-8)** Cross, D.; Thoron, G.; Jeltema, T. E.; Swart, A. (February 2024). ["Examining the self-interaction of dark matter through central cluster galaxy offsets"](https://watermark02.silverchair.com/stae442.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA08wggNLBgkqhkiG9w0BBwagggM8MIIDOAIBADCCAzEGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMJI_11ztfdzP2NbHgAgEQgIIDAsIsfYz20Hsv92KStglCIDOeXItrHBg70-Q2eubxN9hGZGfbEmFvU4FrseB1GnnG5lIWanR_mTZAg2wxdTVxm5fQv9_9V1Z-fEqe2zyRtlAqnN8lhESYwbs4Bsm16LA8GPO73SDbcAbKKlnb3a75cvZyKDKvkhuCuVa8gMliZfw3SQBFnVRxbNCuV4l-DjNYe0uHpy7hd4jq7d4joJYg5hQlV8ug_qCNFPhczV-sGWDBRTo5TT9EUtL1ElatYnO9z_dj_5LNrgiLS_KfMfd0vot5IVx3qy0ZQzsb_KgnDP3uNPrugZvJSG3pn9Ie1bdR5cNjtyVYJfX_s2ad4-f30yGeqZbf66FVHd90JnUwK5LH4yiGdh7dxNNJ-nzCy3w5T-lB3F_a0_GfuWt2Xpa_kXmnPIfGpmyhP5S8m8cbk1XmHQ03nQ5AF-_tE-xuIzfG9XfglDomwlEsSX-ac56VelHf4qd_SvcePjRwvFJArXePk3CgMIlGwKYkM1UEYayf1LFBlrDnl-Cp9tbbB3FnZb3nCdrgrDDWkca8YjxI_h_xhAcCGoA1qa2THSRhOszvFs9AmheuxHyz6Bu6btgIQNB7JUEWwyt-mw85CL7dV4Hn7igSHoo2f6Xu7aGx2Eehz3PDvsci9GYxqHzDb7FHnb-H8tSUdDR80VHs5l9a_HZpzG32xRx8Blq1qMkz1V6vdi42kHWrx7ggXxORF6857LfXO0WF2iUswPuehEml8pJm0-RFbGQW6zTGj85oM-j0pXXjBu5BRPvWCdcYmTF3jcjMGyvUFv-qadGtg-ieBaZJzGKvLmawACQU7oaB2zl74VV3qNqubRYVaErgWJUVtMYjn4Or5GYMG090tz9nuszq1W1hCVhJCBxY3dUGfXFHoKYjMfzY0Lj7b2HXe4LU1lVxs5rHameNz521JOg9StOGWXopAJij4DZK7Fb4VSzl2rnUUX0lLKjNfQ1TG_ZZmhucGtsKgRNiiHh--NJnTXSxmBrigjqDO7eZtYuE0TMjiWcD) (PDF). *Monthly Notices of the Royal Astronomical Society*. **529** (1). [doi](/source/Doi_(identifier)):[10.33232/001c.122309](https://doi.org/10.33232%2F001c.122309). [ISSN](/source/ISSN_(identifier)) [2565-6120](https://search.worldcat.org/issn/2565-6120).

## External links

- Abell 2009 BCG on [WikiSky](/source/WikiSky): [DSS2](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=DSS2), [SDSS](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=SDSS), [GALEX](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=GALEX), [IRAS](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=IRAS), [Hydrogen α](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=HALPHA), [X-Ray](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=RASS), [Astrophoto](http://www.wikisky.org/?object=Abell+2009+BCG&img_source=IMG_all), [Sky Map](http://www.wikisky.org/?object=Abell+2009+BCG), [Articles and images](http://www.wikisky.org/starview?object=Abell+2009+BCG)

v t e Constellation of Boötes Boötes in Chinese astronomy Boötes Void List of stars in Boötes Stars Bayer α (Arcturus) β (Nekkar) γ (Seginus) δ (Qigong) ε (Izar, Pulcherrima) ζ η (Muphrid) θ ι κ λ (Xuange) μ1 (Alkalurops) μ2 ν1 ν2 ξ ο π ρ (Kalasungsang) σ (Genghe) τ (Tepiamenit) υ φ χ ψ ω Flamsteed 1 2 3 6 (e) 7 9 10 11 12 (d) 13 14 15 18 20 22 (f) 24 (g) 26 31 32 33 34 (Alrumh) 38 (Merga) 39 40 44 (Quadrans) 45 (c) 46 (b) 47 (k) 50 Variable R S T RX ZZ AB BL BP BX BY CE CH CI CN CP CR CX CY (101 Vir) DE EK HN HP HD 118508 118889 122563 125040 125351 (A) 125658 126128 126129 126141 126200 126271 127304 127334 127726 128093 128198 129132 129357 130084 130603 130917 131040 131473 131496 (Arcalís) 132029 132406 132563 134064 134335 135438 135530 135944 141399 Other 2MASS J15031961+2525196 CFBDSIR 1458+10 Gliese 526 HAT-P-4 LHS 2924 PSR J1544+4937 SDSS J1416+1348 SDSS J1433+1011 TVLM 513-46546 WASP-14 WD 1425+540 ZTF J153932.16+502738.8 Exoplanets HAT-P-4b HD 128311 b c HD 132406 b HD 136418 b (Awasis) τ Boötis b TOI-1853 b WASP-14b Star clusters NGC 5466 Galaxies NGC 5008 5248 5251 5416 5490 5500 5504 5508 5514 5523 5529 5532 5533 5535 5539 5541 5544 5545 5548 5557 5559 5562 5579 5582 5591 5601 5603 5609 5613 5614 5615 5624 5629 5630 5641 5642 5653 5665 5676 5681 5682 5683 5698 5714 5722 5752 5753 5754 5755 5772 5778 5784 5790 5820 5821 5829 5837 5857 5875 5876 5886 5888 5896 5929 5930 5966 Numbered I II III Other 3C 295 3C 299 3C 300 3C 303 3C 315 4C 19.44 4C +26.42 7C 1354+2552 Abell 2009 BCG Arp 302 B2 1420+32 B2 1441+26 CEERS-2112 CEERS-93316 CEERS2-588 CLASS B1359+154 Cloverleaf quasar DDO 190 EGS-zs8-1 EGS-z11-R0 EGSY8p7 H1426+428 IC 4397 IC 4461 IC 4462 IC 4481 IC 4516 IRAS 13349+2438 IRAS 14394+5332 IRAS 15206+3342 LEDA 2108986 MACS 1423-z7p64 MACS J1447.4+0827 BCG Maisie's Galaxy Markarian 463 Markarian 471 Markarian 478 MS 1455.0+2232 BCG MS 1512-cB58 NVSS J141343+433945 OQ 172 OQ 530 PG 1411+442 PG 1543+489 PGC 93125 PGC 1470080 PKS 1345+125 PKS 1413+135 QSO B1422+202 RBS 1467 RGZ J145001.5+144747 RGZ J145039.8+441829 SBS 1415+437 SDSS J135646.10+102609.0 SDSS J1430+2303 Teacup galaxy UGC 8669 UGC 9128 UGC 9425 UGC 9684 UGC 9796 ULAS J1342+0928 VV 191 Galaxy clusters Abell 1795 Abell 1991 BoRG-58 IDCS J1426.5+3508 Astronomical events GRB 990123 GRB 080319B SCP 06F6 SN 2003fg SN 2005bc SN 2020tlf Category

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Adapted from the Wikipedia article [Abell 2009 BCG](https://en.wikipedia.org/wiki/Abell_2009_BCG) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Abell_2009_BCG?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.