Abell 1991

{{Short description|Galaxy cluster in the constellation of Boötes}} {{Infobox galaxy cluster | name = [[Abell catalogue|Abell]] 1991 | image = | caption = | credit = | epoch = [[Epoch (astronomy)#Julian years and J2000|J2000]] | constellation = [[Boötes]] | ra = {{RA|14|54|30.2}}<ref name="NED">{{cite web | url = http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+1991&extend=no | title = NED results for object ABELL 1991 | publisher = NASA/IPAC Extragalactic Database (NED) | access-date = March 17, 2012 }}</ref> | dec = {{DEC|+18|37|51}}<ref name="NED" /> | brightest_member = | member_no = | richness = 1 <ref name="ACO">{{cite journal | last1 = Abell | first1 = George O. | authorlink1 = George O. Abell | last2 = Corwin | first2 = Harold G. Jr. | authorlink2 = Harold G. Corwin | last3 = Olowin | first3 = Ronald P. | authorlink3 = Ronald P. Olowin |date=May 1989 | title = A catalog of rich clusters of galaxies | journal = Astrophysical Journal Supplement Series | volume = 70 | issue = May 1989 | pages = 1–138 | issn = 0067-0049 | bibcode = 1989ApJS...70....1A | doi = 10.1086/191333 | doi-access = free }}</ref> | bmtype = I <ref name="ACO" /> | velocity_dispersion = | redshift = 0.05870 (17 598)<ref name="NED" /> | distance = {{convert|249|Mpc|Mly|0|abbr=on|lk=on}} {{hub|0.705}} <ref name="NED" /> | temperature = 2.61 [[electron volt|keV]]<ref name="Vikhlinin">Table 4 from {{cite journal | last1 = Vikhlinin | first1 = A. | last2 = Kravtsov | first2 = A. | author3 = Forman, W. |author4=Jones, C. |author5=Markevitch, M. |author6=Murray, S. S. |author7=Van Speybroeck, L. |date=April 2006 | title = Chandra Sample of Nearby Relaxed Galaxy Clusters: Mass, Gas Fraction, and Mass-Temperature Relation | journal = The Astrophysical Journal | volume = 640 | issue = 2 | pages = 691–709 | location = Chicago, Illinois, USA | arxiv = astro-ph/0507092 | bibcode = 2006ApJ...640..691V | doi = 10.1086/500288 | s2cid = 18940822 }}</ref> | mass = 1.23{{e|14}}<ref name="Vikhlinin" /> | luminosity = | flux = (9.40 ± 16.7%){{e|-12}} [[erg]] s<sup>−1</sup> cm<sup>−2</sup> (0.1–2.4 [[electron volt|keV]])<ref name="NED" /> | other_names = }} '''Abell 1991''' is a [[galaxy cluster]] in the [[Abell catalogue]].

==See also== * [[Abell catalogue]] * [[List of Abell clusters]]

==References== {{reflist}}

{{DEFAULTSORT:Abell clusters}} [[Category:Abell objects|1991]] [[Category:Galaxy clusters]] [[Category:Abell richness class 1]] [[Category:Boötes]]