NGC 5053

NGC 5053
Observation data (J2000 epoch)
Class	XI
Constellation	Coma Berenices
Right ascension	13^h 16^m 27.09^s^[1]
Declination	+17° 42′ 00.9″^[1]
Distance	17.4 kpc (57 kly)^[2]
Apparent magnitude (V)	9.96^[3]
Apparent dimensions (V)	10.5'
Physical characteristics
Tidal radius	89.13 pc (290.7 ly)^[2]
Metallicity	${\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}$ = −2.30^[3] dex
Estimated age	7017388158480000000♠12.3±0.7 Ga^[4]
Other designations	C 1313+179, GCl 23

NGC 5053 is the New General Catalogue designation for a globular cluster in the northern constellation of Coma Berenices. It was discovered by German-British astronomer William Herschel on March 14, 1873 and cataloged as VI-7. In his abbreviated notation, he described it as, "an extremely faint cluster of extremely small stars with resolvable nebula 8 or 10′ diameter, verified by a power of 240, beyond doubt".^[5] Danish-Irish astronomer John Louis Emil Dreyer reported in 1888 that the cluster appeared, "very faint, pretty large, irregular round shape, growing very gradually brighter at the middle".^[6]

This is a metal-poor cluster, meaning the stars have a low abundance of elements other than hydrogen and helium—what astronomers term metallicity. As recently as 1995, it was considered the most metal-poor globular cluster in the Milky Way.^[7] The chemical abundances of the stars in NGC 5053 are more similar to those in the dwarf galaxy Sagittarius Dwarf Spheroidal Galaxy than to the Milky Way halo. Along with the kinematics of the globular cluster, this suggests that NGC 5053 may have been stripped from the dwarf galaxy.^[8]

There are ten known RR Lyrae variable stars in this cluster with masses ranging from 68% to 78% of the solar mass. Nine of these variables were reported by German astronomer Walter Baade in 1928, and the tenth by American astronomer Helen Sawyer in 1946.^[9] The cluster hosts 27 known blue stragglers,^[4] of which five are short period SX Phoenicis variable stars.^[9]

NGC 5053 is a relatively low mass cluster with a low core concentration factor of 1.32. It sports a stream of tidal debris to the west with a projected length of 1.7 kpc. This stream may have been created through shock-induced processes.^[10] The cluster is located less than 3° from Messier 53 and the two have nearly the same distance modulus, which corresponds to a spatial separation of around 2 kpc. There is a tidal bridge joining M53 to NGC 5053, suggesting the pair may have interacted in the past.^[2] The cluster is following an orbit through the Milky Way that has a perigalacticon distance of 9 kpc and an orbital eccentricity of 0.84.^[10] At present, it is 18.4 kpc from the Galactic Core, with a radial velocity of 7004420000000000000♠42.0±1.4 km/s.^[2]

References

1 2 Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830.
1 2 3 4 Boberg, Owen M.; et al. (May 2015), "Chemical Abundances in NGC 5053: A Very Metal-poor and Dynamically Complex Globular Cluster", The Astrophysical Journal, 804 (2): 12, arXiv:1504.01791, Bibcode:2015ApJ...804..109B, doi:10.1088/0004-637X/804/2/109, 109.
1 2 Dalessandro, Emanuele; et al. (November 2012), "Ultraviolet Properties of Galactic Globular Clusters with Galex. II. Integrated Colors", The Astronomical Journal, 144 (5): 13, arXiv:1208.5698, Bibcode:2012AJ....144..126D, doi:10.1088/0004-6256/144/5/126, 126.
1 2 Arellano Ferro, A.; et al. (February 2010), "CCD time-series photometry of the globular cluster NGC 5053: RR Lyrae, Blue Stragglers and SX Phoenicis stars revisited", Monthly Notices of the Royal Astronomical Society, 402 (1): 226−244, arXiv:0910.2068, Bibcode:2010MNRAS.402..226A, doi:10.1111/j.1365-2966.2009.15931.x.
↑ Herschel, William (1786), "Catalogue of One Thousand New Nebulae and Clusters of Stars", Philosophical Transactions of the Royal Society of London, 76: 457−499, Bibcode:1786RSPT...76..457HSee p. 495.
↑ Dreyer, John L. E. (1971), "New General Catalogue of Nebulae and Clusters of Stars", Memoirs of the Royal Astronomical Society, London: 141, retrieved 2016-08-08.
↑ Sarajedini, Ata; Milone, Alejandra A. E. (January 1995), "BVI CCD photometry of NGC 5053: The most metal-poor galactic globular cluster", The Astronomical Journal, 109 (1669): 269−279, Bibcode:1995AJ....109..269S, doi:10.1086/117271.
↑ Sbordone, L.; et al. (July 2015), "Chemical abundances of giant stars in NGC 5053 and NGC 5634, two globular clusters associated with the Sagittarius dwarf spheroidal galaxy?", Astronomy & Astrophysics, 579: 12, arXiv:1505.01487, Bibcode:2015A&A...579A.104S, doi:10.1051/0004-6361/201425509, A104.
1 2 Nemec, James M. (April 2004), "Physical Characteristics of the RR Lyrae Stars in the Very Metal Poor Globular Cluster NGC 5053", The Astronomical Journal, 127 (4): 2185−2209, Bibcode:2004AJ....127.2185N, doi:10.1086/382903.
1 2 Lauchner, Adam; et al. (November 2006), "Discovery of a Tidal Stream Extending from NGC 5053", The Astrophysical Journal, 651 (1): L33−L36, Bibcode:2006ApJ...651L..33L, doi:10.1086/509254.

New General Catalogue 5000 to 5499

NGC 5000 NGC 5001 NGC 5002 NGC 5003 NGC 5004 NGC 5005 NGC 5006 NGC 5007 NGC 5008 NGC 5009 NGC 5010 NGC 5011 NGC 5012 NGC 5013 NGC 5014 NGC 5015 NGC 5016 NGC 5017 NGC 5018 NGC 5019 NGC 5020 NGC 5021 NGC 5022 NGC 5023 NGC 5024 NGC 5025 NGC 5026 NGC 5027 NGC 5028 NGC 5029 NGC 5030 NGC 5031 NGC 5032 NGC 5033 NGC 5034 NGC 5035 NGC 5036 NGC 5037 NGC 5038 NGC 5039 NGC 5040 NGC 5041 NGC 5042 NGC 5043 NGC 5044 NGC 5045 NGC 5046 NGC 5047 NGC 5048 NGC 5049 NGC 5050 NGC 5051 NGC 5052 NGC 5053 NGC 5054 NGC 5055 NGC 5056 NGC 5057 NGC 5058 NGC 5059 NGC 5060 NGC 5061 NGC 5062 NGC 5063 NGC 5064 NGC 5065 NGC 5066 NGC 5067 NGC 5068 NGC 5069 NGC 5070 NGC 5071 NGC 5072 NGC 5073 NGC 5074 NGC 5075 NGC 5076 NGC 5077 NGC 5078 NGC 5079 NGC 5080 NGC 5081 NGC 5082 NGC 5083 NGC 5084 NGC 5085 NGC 5086 NGC 5087 NGC 5088 NGC 5089 NGC 5090 NGC 5091 NGC 5092 NGC 5093 NGC 5094 NGC 5095 NGC 5096 NGC 5097 NGC 5098 NGC 5099 NGC 5100 NGC 5101 NGC 5102 NGC 5103 NGC 5104 NGC 5105 NGC 5106 NGC 5107 NGC 5108 NGC 5109 NGC 5110 NGC 5111 NGC 5112 NGC 5113 NGC 5114 NGC 5115 NGC 5116 NGC 5117 NGC 5118 NGC 5119 NGC 5120 NGC 5121 NGC 5122 NGC 5123 NGC 5124 NGC 5125 NGC 5126 NGC 5127 NGC 5128 NGC 5129 NGC 5130 NGC 5131 NGC 5132 NGC 5133 NGC 5134 NGC 5135 NGC 5136 NGC 5137 NGC 5138 NGC 5139 NGC 5140 NGC 5141 NGC 5142 NGC 5143 NGC 5144 NGC 5145 NGC 5146 NGC 5147 NGC 5148 NGC 5149 NGC 5150 NGC 5151 NGC 5152 NGC 5153 NGC 5154 NGC 5155 NGC 5156 NGC 5157 NGC 5158 NGC 5159 NGC 5160 NGC 5161 NGC 5162 NGC 5163 NGC 5164 NGC 5165 NGC 5166 NGC 5167 NGC 5168 NGC 5169 NGC 5170 NGC 5171 NGC 5172 NGC 5173 NGC 5174 NGC 5175 NGC 5176 NGC 5177 NGC 5178 NGC 5179 NGC 5180 NGC 5181 NGC 5182 NGC 5183 NGC 5184 NGC 5185 NGC 5186 NGC 5187 NGC 5188 NGC 5189 NGC 5190 NGC 5191 NGC 5192 NGC 5193 NGC 5194 NGC 5195 NGC 5196 NGC 5197 NGC 5198 NGC 5199 NGC 5200 NGC 5201 NGC 5202 NGC 5203 NGC 5204 NGC 5205 NGC 5206 NGC 5207 NGC 5208 NGC 5209 NGC 5210 NGC 5211 NGC 5212 NGC 5213 NGC 5214 NGC 5215 NGC 5216 NGC 5217 NGC 5218 NGC 5219 NGC 5220 NGC 5221 NGC 5222 NGC 5223 NGC 5224 NGC 5225 NGC 5226 NGC 5227 NGC 5228 NGC 5229 NGC 5230 NGC 5231 NGC 5232 NGC 5233 NGC 5234 NGC 5235 NGC 5236 NGC 5237 NGC 5238 NGC 5239 NGC 5240 NGC 5241 NGC 5242 NGC 5243 NGC 5244 NGC 5245 NGC 5246 NGC 5247 NGC 5248 NGC 5249 NGC 5250 NGC 5251 NGC 5252 NGC 5253 NGC 5254 NGC 5255 NGC 5256 NGC 5257 NGC 5258 NGC 5259 NGC 5260 NGC 5261 NGC 5262 NGC 5263 NGC 5264 NGC 5265 NGC 5266 NGC 5267 NGC 5268 NGC 5269 NGC 5270 NGC 5271 NGC 5272 NGC 5273 NGC 5274 NGC 5275 NGC 5276 NGC 5277 NGC 5278 NGC 5279 NGC 5280 NGC 5281 NGC 5282 NGC 5283 NGC 5284 NGC 5285 NGC 5286 NGC 5287 NGC 5288 NGC 5289 NGC 5290 NGC 5291 NGC 5292 NGC 5293 NGC 5294 NGC 5295 NGC 5296 NGC 5297 NGC 5298 NGC 5299 NGC 5300 NGC 5301 NGC 5302 NGC 5303 NGC 5304 NGC 5305 NGC 5306 NGC 5307 NGC 5308 NGC 5309 NGC 5310 NGC 5311 NGC 5312 NGC 5313 NGC 5314 NGC 5315 NGC 5316 NGC 5317 NGC 5318 NGC 5319 NGC 5320 NGC 5321 NGC 5322 NGC 5323 NGC 5324 NGC 5325 NGC 5326 NGC 5327 NGC 5328 NGC 5329 NGC 5330 NGC 5331 NGC 5332 NGC 5333 NGC 5334 NGC 5335 NGC 5336 NGC 5337 NGC 5338 NGC 5339 NGC 5340 NGC 5341 NGC 5342 NGC 5343 NGC 5344 NGC 5345 NGC 5346 NGC 5347 NGC 5348 NGC 5349 NGC 5350 NGC 5351 NGC 5352 NGC 5353 NGC 5354 NGC 5355 NGC 5356 NGC 5357 NGC 5358 NGC 5359 NGC 5360 NGC 5361 NGC 5362 NGC 5363 NGC 5364 NGC 5365 NGC 5366 NGC 5367 NGC 5368 NGC 5369 NGC 5370 NGC 5371 NGC 5372 NGC 5373 NGC 5374 NGC 5375 NGC 5376 NGC 5377 NGC 5378 NGC 5379 NGC 5380 NGC 5381 NGC 5382 NGC 5383 NGC 5384 NGC 5385 NGC 5386 NGC 5387 NGC 5388 NGC 5389 NGC 5390 NGC 5391 NGC 5392 NGC 5393 NGC 5394 NGC 5395 NGC 5396 NGC 5397 NGC 5398 NGC 5399 NGC 5400 NGC 5401 NGC 5402 NGC 5403 NGC 5404 NGC 5405 NGC 5406 NGC 5407 NGC 5408 NGC 5409 NGC 5410 NGC 5411 NGC 5412 NGC 5413 NGC 5414 NGC 5415 NGC 5416 NGC 5417 NGC 5418 NGC 5419 NGC 5420 NGC 5421 NGC 5422 NGC 5423 NGC 5424 NGC 5425 NGC 5426 NGC 5427 NGC 5428 NGC 5429 NGC 5430 NGC 5431 NGC 5432 NGC 5433 NGC 5434 NGC 5435 NGC 5436 NGC 5437 NGC 5438 NGC 5439 NGC 5440 NGC 5441 NGC 5442 NGC 5443 NGC 5444 NGC 5445 NGC 5446 NGC 5447 NGC 5448 NGC 5449 NGC 5450 NGC 5451 NGC 5452 NGC 5453 NGC 5454 NGC 5455 NGC 5456 NGC 5457 NGC 5458 NGC 5459 NGC 5460 NGC 5461 NGC 5462 NGC 5463 NGC 5464 NGC 5465 NGC 5466 NGC 5467 NGC 5468 NGC 5469 NGC 5470 NGC 5471 NGC 5472 NGC 5473 NGC 5474 NGC 5475 NGC 5476 NGC 5477 NGC 5478 NGC 5479 NGC 5480 NGC 5481 NGC 5482 NGC 5483 NGC 5484 NGC 5485 NGC 5486 NGC 5487 NGC 5488 NGC 5489 NGC 5490 NGC 5491 NGC 5492 NGC 5493 NGC 5494 NGC 5495 NGC 5496 NGC 5497 NGC 5498 NGC 5499

Astronomical catalog List of NGC objects

This article is issued from Wikipedia - version of the 12/2/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.