tag:blogger.com,1999:blog-996609237882090723.post3348904847238200202..comments2024-01-13T02:28:25.074-04:00Comments on Physicists of the Caribbean: MOAAAARR GALAXIES !Rhysyhttp://www.blogger.com/profile/13219113442790412792noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-996609237882090723.post-19995552328586217212015-10-14T18:06:43.149-04:002015-10-14T18:06:43.149-04:00I'll have to check the papers but at least a c...I'll have to check the papers but at least a couple do have redshift measurements. However I don't think they have good enough measurements (e.g. long slit spectroscopy) to determine rotation curves. This would be difficult because the things are so faint, though I don't know enough about it to say quantify how difficult it would be.<br /><br />A very few of the galaxies in Virgo do have HI detections, so with the VLA it might be possible to construct a rotation curve but no-one's done this yet. I can think of one of them off the top of my head because it happened to be in an AGES cube and already detected in a previous deep optical survey. IIRC it had very high gas content compared to its stellar mass. The weird thing is that there's this one gas rich object but many similar objects which apparently don't have any gas at all.Rhysyhttps://www.blogger.com/profile/13219113442790412792noreply@blogger.comtag:blogger.com,1999:blog-996609237882090723.post-54102968337666584342015-10-14T17:57:52.436-04:002015-10-14T17:57:52.436-04:00Hi Rhys, is it currently possible to measure stell...Hi Rhys, is it currently possible to measure stellar motions within these "dark galaxies" to construct rotation curves, or carry out spectroscopic observations ?Adamhttps://www.blogger.com/profile/08412766655158944696noreply@blogger.com