From keel@bildad.astr.ua.edu Tue Nov 1 08:58:21 1994 Return-Path: Received: from bildad.astr.ua.edu by hera.astr.ua.edu (4.1/SMI-4.1) id AA24026; Tue, 1 Nov 94 08:58:21 CST Received: by bildad.astr.ua.edu (920330.SGI/920502.SGI.AUTO) for gelmore@hera.astr.ua.edu id AA10187; Tue, 1 Nov 94 07:08:08 -0800 Date: Tue, 1 Nov 94 07:08:08 -0800 From: keel@bildad.astr.ua.edu (William Keel) Message-Id: <9411011508.AA10187@bildad.astr.ua.edu> To: gelmore@hera.astr.ua.edu Subject: smoe caption info Status: R ngc6240.gif The notorious merging and infrared-bright galaxy NGC 6240 in Ophiuchus, seen in a composite of BVR CCD images obtained with the ESO/MPI 2.2m telescope at La Silla, Chile. Logarithmic mapping has been used to stress detail over a wide dynamic range. A double nucleus may be the last vestige of one of the pre-merger galaxies, while tidal tails betray the strong gravitational interaction between the former galaxies. The reddish color of the innermost regions is due to a large amount of dust absorption, preferntially blocking blue light. This galaxy became well-known when the IRAS satellite found it to have an enormous far-infrared luminosity; this is one of the prototype "IRAS galaxies". m87inner.gif The bright elliptical radio galaxy Messier 87 (NGC 4486) is perhaps best known for the synchrotron jet seen here. This image, taken in red light using a TI CCD at the Kitt Peak 2.1m telescope, is stretched to emphasize the bright regions and the jet. m87outer.gif This is taken from the same image as m87inner.gif, now mapped to stress the outer parts of M87 and some of the many globular clusters surrounding the galaxy. m82r.gif The nearby interacting starburst galaxy Messier 82 (NGC 3034) in an image through a narrow-band filter including H-alpha emission. The ionized-gas filaments extending along the galaxy's minor axis trace a large-scale wind powered by the starburst. The image was taken with a TI CCD at the Lowell 1.1m telescope. q0957.gif The "original" gravitationally-lensed quasar Q0957+561A,B, seen in a red-light image digitized from an image-tube plate taken with the Kitt Peak 2.1-meter telescope. The southern image appears a bit fuzzy due to the light of the brightest galaxy in the lensing cluster. The quasar images are about 6 arcseconds apart; the brightest cluster galaxy is centered only 1 arcsecond from the southern (B) image. A few other members of the cluster can be seen on careful inspection of the area around the quasar images. m92r.gif The bright globular cluster Messier 92 in Lyra, seen in a red-light CCD image from the Lowell 1.1m telscope. m51_sn94i.gif The bright supernova SN 1994I in M51, seen in a V-band image taken with the Lowell 1.1m telescope on 14 April 1994. For comparison, the pixel scale is the same as in the color image m51.gif. m110r.gif The outer immediate companion of Andromeda, NGC 205 (sometimes denoted Messier 110). Unlike most dwarf elliptical or spheroidal galaxies, it has recognizable dust clouds (two are visible here at about the 7 o'clock and 11 o'clock positions from the nucleus) and clear signs of recent star formation. This image shows a 9-arcminute section, seen in red light with the Lowell 1.1m telescope, focal reducer, and TI CCD. The nonlinear inensity mapping shows both the outer envelope and innermost bright, sharp nucleus. m31r.gif The inner part of the Andromeda Galaxy Messier 31 (NGC 224), from a red-light CCD image taken with the Lowell Observatory 1.1m telescope and focal reducer. The area shown is 9 arcminutes on a side (about 2000 parsecs=6500 light-years at the distance of M31). The bright nucleus is apparent, recently shown to be in fact double as well as the possible site of a massive black hole. The focal reducer produces strongly comatic images (radially stretched) near the corners of the field. Hodge's _Atlas of the Andromeda Galaxy_ lists several catalogued globular clusters in this field; the brightest are G185 at pixel coordinates 216, 265; G189 at 165, 163; and G177 at 297, 294. A few of the inner dust clouds also appear, mainly north of the nucleus (the near side of the galaxy). m64.gif The "Black Eye' or "Sleeping Beauty" galaxy Messier 64 (NGC 4826), recently shown to have two counterrotating systems of stars and gas in its disk. The peculiar dust lane on one side of the nucleus (also a site of star formation, as shown by the blue knots imbedded in it) may be caused by material from a former companion which has been accreted but has yet to settle into the mean orbital plane of the disk. orionhalpha.gif The innermost part of the Orion Nebula (Messier 42) taken in a filter emphasizing H-alpha emission. This shows the intricate structure of the nebula as revealed by gas. The four bright stars constitute the Trapezium; most of the ionizing radiation for this part of the nebula comes from the hottest of these stars. orioncontm.gif The same region of the Orion Nebula as in orionhalpha.gif, now in a filter that passes essentially pure continuum radiation. Fainter members of the associated star cluster can be seen now free of the strong emission seen at H-alpha; much of the nebular structure seen in this filter is from starlight scattered by dust grains. Both Orion images were taken with a Loral CCD at the Lowell Observatory 1.1m telescope. To come: ngc628seeing - good versus poor seeing on a spiral galaxy m33 nucleus m32 center ngc2903 ngc7331 stefan deep wfpc2 galaxy field in color ngc6384 ngc4216 ngc5055 ngc3368 ngc3992 ngc3351 ngc4647/9 Cen A BVR - dust reddening, blue clusters, maybe AGN scattered light