Abell 400 - Galaxy - astro.wikisort.org

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Abell 400 is a galaxy cluster which contains the galaxy NGC 1128 with two supermassive black holes (3C 75) spiraling towards merger.

Abell 400
Two supermassive black holes spiraling towards merger near the center of NGC 1128, some 25,000 light years away from each other.
Observation data (Epoch J2000)
Constellation(s)	Cetus
Right ascension	02^h 57^m 38.6^s[1]
Declination	+06° 02′ 00″[1]
Richness class	1[2]
Bautz–Morgan classification	II-III[2]
Redshift	0.0244 (7 315 km/s)[1]
Distance (co-moving)	100 Mpc (326 Mly) h⁻¹ _0.705
X-ray flux	(16.2 ± 20.5%)×10⁻¹² erg s⁻¹ cm⁻² (0.1–2.4 keV)[1]
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

These two supermassive black holes are contained in NGC 1128. The galaxy, microwave radio jets, multi-million degree X-ray producing gas and resultant radio source is known as 3C 75. X-ray source 2A 0252+060 (1H 0253+058, XRS 02522+060) may be some additional or other portion of Abell 400.[3]

The black holes are an estimated 25,000 light years apart, and thus will take millions of years to collide. Should the two supermassive black holes merge, they will form a single super-supermassive black hole.[4]

References

"NED results for object ABELL 0400". NASA/IPAC Extragalactic Database (NED). Retrieved March 15, 2012.
Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series. 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved March 12, 2012.
Wood KS; Meekins JF; Yentis DJ; Smathers HW; McNutt DP; Bleach RD (December 1984). "The HEAO A-1 X-ray source catalog". Astrophys. J. Suppl. Ser. 56 (12): 507–649. Bibcode:1984ApJS...56..507W. doi:10.1086/190992.
"Chandra :: Photo Album :: 3C 75 in Abell 400 :: 06 Apr 06". chandra.harvard.edu. Retrieved 2019-02-16.

External links

Pair of black holes locked in death dance (CNN) Thursday, April 6, 2006; Posted: 2:46 p.m. EDT (18:46 GMT)
Black Holes Bound to Merge (SPACE.com) 6 April 2006 11:48 am ET
Black Holes Dance With Incredible Violence (SpaceDaily) Apr 12, 2006
Study Finds Two Supermassive Black Holes Spiraling Toward Collision (Newswise) Apr 6, 2006

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Constellation of Cetus

List of stars in Cetus
Cetus in Chinese astronomy

Stars

Bayer	α (Menkar) β (Diphda) γ (Kaffaljidhma) δ ε ζ (Baten Kaitos) η θ ι κ¹ κ² λ μ ν ξ¹ ξ² ο (Mira) π ρ σ τ υ φ¹ φ² φ³ φ⁴ χ
Flamsteed	1 2 3 6 7 9 13 14 20 46 49 56 63 69 75 77 79 81 84 94 25 Ari
Variable	T BL VZ (Mira B) UV YZ ZZ DK
HR	10 72 159 228 500
HD	1690 2638 4747 5319 6718 7449 11506 11964 15115 16008 224693 (Axólotl)
Other	BD-07 436 BD−17 63 (Felixvarela) Cayrel's Star CFBDS J005910.90–011401.3 DENIS-P J020529.0−115925 GD 40 Gliese 105 GJ 1005 HATS-3 HIP 5158 HIP 11952 LHS 1140 NGC 156 NGC 158 NGC 302 NGC 308 NGC 310 PSR J0108−1431 SDSS J001820.5−093939.2 SDSS J0106−1000 ULAS J003402.77−005206.7 WD J2356−209 WASP-26 WASP-44 WASP-71 (Mpingo) WISE J0254+0223 WHL0137-LS

Exoplanets	79 Ceti b 81 Ceti b 94 Ceti b BD−17 63 b HD 1461 b HD 2638 b HD 5319 b HD 11506 b c HD 11964 b c HD 224693 b HIP 5158 b c HIP 11915 b Tau Ceti e f

Nebulae	NGC 246

Galaxies

Messier	77
NGC	17 35 45 47 50 54 59 61 62 64 65 66 73 77 102 107 113 114 116 117 118 120 124 132 135 142 143 144 145 151 154 155 157 161 163 165 166 167 168 170 171 172 173 177 178 179 187 191 192 195 196 197 201 207 209 210 216 217 219 223 227 230 232 235 237 239 244 245 247 255 259 263 268 270 271 273 274 275 276 277 279 283 284 285 286 291 293 297 298 301 303 307 309 320 321 325 327 329 331 333 335 336 337 340 341 342 343 344 345 347 349 350 351 352 353 355 356 357 359 363 364 367 369 377 391 413 417 426 428 429 430 435 442 445 448 450 478 480 481 487 493 497 519 521 533 540 541 545 547 560 570 584 585 596 615 622 655 681 690 701 720 755 779 800 806 838 874 880 908 936 950 960 965 966 985 988 1015 1019 1022 1032 1042 1052 1055 1073 1087 1090 1128 1142
Other	Arp 147 Arp 256 3C 75 Cetus Dwarf HCM-6A HD2 Holmberg 15A HXMM01 IC 1613 SDSS J0303-0019 SXDF-NB1006-2 9Spitch Wolf–Lundmark–Melotte

Galaxy clusters	Abell 133 Abell 222 Abell 223 Abell 370 Abell 400 Gioiello IRC 0218 JKCS 041

Astronomical events	SN 2005E SN 2005gj

See also

References

External links