Abell 754

{{Short description|Galaxy cluster}} {{Infobox galaxy cluster | name = [[Abell catalogue|Abell]] 754 | image = | caption = | credit = | epoch = [[Epoch (astronomy)#Julian years and J2000|J2000]] | constellation = [[Hydra (constellation)|Hydra]] | ra = {{RA|09|08|50.1}}<ref name="NED">{{cite web | url = http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+754&extend=no | title = NED results for object ABELL 0754 | publisher = NASA/IPAC Extragalactic Database (NED) | access-date = March 15, 2012 }}</ref> | dec = {{DEC|-09|38|12}}<ref name="NED" /> | brightest_member = | member_no = | richness = 2<ref name="ACO">{{cite journal | last1 = Abell | first1 = George O. | author-link1 = George O. Abell | last2 = Corwin | first2 = Harold G. Jr. | author-link2 = Harold G. Corwin | last3 = Olowin | first3 = Ronald P. | author-link3 = 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 | format = PDF | issn = 0067-0049 | bibcode = 1989ApJS...70....1A | doi = 10.1086/191333 | access-date = March 12, 2012 | url = http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1989ApJS...70....1A&page_ind=0&epage_ind=137&type=PRINTER&data_type=PDF_HIGH&email=&emailsize=500&emailsplit=YES&send=GET&verified=YES | doi-access = free }}</ref> | bmtype = I-II<ref name="ACO" /> | velocity_dispersion = | redshift = 0.5420 (16 249 km/s)<ref name="NED" /> | distance = {{convert|233|Mpc|Mly|0|abbr=on|lk=on}} {{hub|0.705}} <ref name="NED" /> | temperature = | mass = | luminosity = | flux = 4.35{{e|-11}} [[erg]] s<sup>−1</sup> cm<sup>−2</sup> (0.5–2 [[electron volt|keV]])<ref name="NED" /> | other_names = }}

'''Abell 754''' is a [[galaxy cluster]] in the [[constellation]] [[Hydra (constellation)|Hydra]] that was formed from the collision of two smaller clusters. This collision, which began about 300 million years ago, is ongoing, and the system is still disturbed. Eventually, the cluster will reach a level of equilibrium in a few billion years.

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

==References== {{reflist}}

==External links== * [http://www.nasa.gov/centers/goddard/news/topstory/2004/0831galaxymerger.html MASSIVE MERGER OF GALAXIES IS THE MOST POWERFUL ON RECORD (NASA)] * [https://www.theregister.co.uk/2004/09/24/galactic_super_prang/ Galaxies rent asunder in huge cosmic collision]

[[Category:Galaxy clusters]] [[Category:Hydra (constellation)]] [[Category:Abell objects|0754]] [[Category:Abell richness class 2]]