Talk:Coma Cluster

Intracluster gas section

The text in this section applies to all galaxy clusters, not just Coma (I work in this field). I suggest it is chopped, as these points are already made in Galaxy cluster. Xioxox 14:08, 15 August 2007 (UTC)[reply]

Picture

Most of the objects in the picture above are galaxies; only the very bright objects with diffraction spikes and the smallest circular dots are foreground stars of our own Galaxy. There's no picture in this article. Was there one earlier and it disappeared? Privong 17:21, 14 November 2006 (UTC)[reply]

According to the edit history, an unreferenced image was deleted by a bot. Maybe the reference to the image should be deleted? GeorgeJBendo 18:26, 14 November 2006 (UTC)

Ok. I took care of it. Privong 20:15, 14 November 2006 (UTC)[reply]

Requested move

The following is a closed discussion of the proposal. Please do not modify it. Subsequent comments should be made in a new section on the talk page. No further edits should be made to this section.

The result of the proposal was 'Move to Coma Cluster. Duja 07:12, 23 October 2006 (UTC)[reply]

Coma cluster of galaxies → Coma Cluster — Although "Coma cluster of galaxies" is sometimes accepted elsewhere, "Coma Cluster" is also frequently used and may be preferable for Wikipedia. The object can be considered a proper noun, so it should be written with the first letters of both words capitalized (much like the first letters of "City", "Lake", and "Mountains" are capitalized in "New York City", "Lake Superior", and "Rocky Mountains"}. Previous discussions show support for this convention in naming articles on clusters. GeorgeJBendo 11:52, 16 October 2006 (UTC)

Survey

Add * '''Support''' or * '''Oppose''' on a new line followed by a brief explanation, then sign your opinion using ~~~~.

Support GeorgeJBendo 11:53, 16 October 2006 (UTC)
Support VikÞor | Talk 19:31, 21 October 2006 (UTC)[reply]

Discussion

I notice that Coma Cluster is currently a disambiguation page, pointing both to this article and to coma star cluster. Is the cluster of galaxies a much more common use of "Coma Cluster" than the star cluster? -GTBacchus^(talk) 03:30, 21 October 2006 (UTC)[reply]

I forgot about the Coma star cluster (as do most extragalactic astronomers). The cluster of galaxies is the object most commonly referred to as the "Coma Cluster". First, searches for "Coma Cluster" on SIMBAD and the NASA/IPAC Extragalactic Database return information on the cluster of galaxies (this article) instead of the open star cluster. Second, a search for scientific papers with "Coma Cluster" in their title at the ADS Abstract Service reveals that most papers discussing the "Coma Cluster" are referring to the cluster of galaxies. The star cluster is usually referred to by a different name, such as "Coma Bernices Open Star Cluster" or "Coma Star Cluster". Third, the top terms in a Google search refer to the cluster of galaxies, not the open star cluster. Even if I ignore my professional experience, the ADS abstract search shows that most people looking for the "Coma Cluster" will probably be looking for the cluster of galaxies, not the open star cluster. Naturally, a disambiguation link to the star cluster should be placed at the top of the article. GeorgeJBendo 09:58, 21 October 2006 (UTC)

The above discussion is preserved as an archive of the proposal. Please do not modify it. Subsequent comments should be made in a new section on this talk page. No further edits should be made to this section.

Galaxy: Exploring the milky way

The newish book Galaxy: Exploring the milky way says the distance from earth is 300 Million LY. Should I put this in? Mocha2007 (talk) 17:48, 3 December 2010 (UTC)[reply]

Velocity dispersion VS radial velocity dispersion

Am I correct that the velocity dispersion listed under "observational data" is actually the measured velocity dispersion along the line of sight, i.e. the RMS galaxy velocity along radial direction corrected for net cluster motion, rather than an inferred full 3D velocity dispersion (which I think is ~sqrt(3) times larger)? That seems to be what the source material indicates. 130.237.208.152 (talk) 15:56, 14 October 2015 (UTC)[reply]

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Coma Cluster. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

Corrected formatting/usage for http://chandra.harvard.edu/xray_sources/coma/

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—^{cyberbot II}_{Talk to my owner:Online} 08:38, 23 June 2016 (UTC)[reply]

External links modified (January 2018)

Hello fellow Wikipedians,

I have just modified 2 external links on Coma Cluster. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 17:17, 24 January 2018 (UTC)[reply]

Papers on its collision with the NGC4839 group

https://www.aanda.org/articles/aa/abs/2001/01/aaxmm09/aaxmm09.html and https://arxiv.org/abs/1811.07944 (still at preprint stage).©Geni (talk) 18:44, 22 November 2018 (UTC)[reply]