Download or read book Near Infrared Surface Photometry of Spiral Galaxies written by James Malcolm Stewart and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Near infrared Surface Photometry of Late type Edge on Spiral Galaxies written by David Barnaby and published by . This book was released on 1994 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Near infrared Surface Photometry of Barred Spiral Galaxies written by Chris Warren Baumgart and published by . This book was released on 1983 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Near Infrared Surface Photometry and Morphology in Virgo Cluster Spiral Galaxy Nuclear Regions written by Bernard J. Rauscher and published by . This book was released on 1995 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Near Infrared Photometry of Spiral Galaxies written by J. M. Stewart and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Near Infrared Photometry of Spiral Galaxies written by J. M. Stewart and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spiral Galaxies in the Near IR written by Dante Minniti and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: From June 7-9, 1995, the European Southern Observatory (ESO) and the Max Plank Institut fiir Astrophysik (MPA) jointly held the Workshop on Spiral Galaxies in the Near-IR. This meeting took place at the ESO headquarters in Garching bei Miinchen, Germany. The weather waschanging, with the biergarten closed, but that did not stop 85 people from allover the world from attending the meeting. The three days were intensive, with talks and coffee and posters from 9 am to 6 pm, and very productive indeed for everyone. The topics covered the stellar populations of the Milky Way and other more distant spirals, the role of dust, the dynamics of spiral galaxies, and the nuclear activity seen at near-IR wavelengths. This volume presents the original contributions from the participants, including several papers that review the state-of-the-art knowledge in these various subjects. The editors would like to thank first and foremost Christina Stoffer, for she took care of everything. The meeting would not have been so successful without her expertise and efficiency. We are deeply indebted to the directors of MPA and ESO Science, Simon White and Jacqueline Bergeron, for their support and encouragement. We would also like to thank the other members of the scientific organizing committee: R. Genzel, K. Freeman, A. Moorwood, S. White, M. Rieke and E. Athannasoula, for their advice with the organization of the program. We also thank G. Rieke, R. Genzel, L. Athannasoula, A. Renzini and R.
Download or read book Infrared Surface Brightness and Absolute Magnitude of Spiral Galaxies written by Sidney Van den Bergh and published by . This book was released on 1981 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Populations of Spiral Galaxies from Surface Photometry written by François Schweizer and published by . This book was released on 1975 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Edge on Disk Galaxies written by Richard de Grijs and published by . This book was released on 1997 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Aspects of Galaxy Photometry written by Jean-Luc Nieto and published by Springer. This book was released on 2005-12-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spiral Galaxies written by Roelof Sybe de Jong and published by . This book was released on 1995 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Far Infrared Emission of Nearby Spiral Galaxies written by Willie Drouhet and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In my PHD work I explored the links between the physical properties of interstellar dust and other components of nearby spiral galaxies especially their stellar content. I worked on 46 disk galaxies from KINGFISH with IRAC/MIPS/PACS/SPIRE maps (3.6 - 500 microns). A bias is usually introduced in estimating disk orientations by using only a single surface brightness isophote. Thus I devised different surface brightness levels separated by constant steps in surface brightness and extracted isophotes at these levels in all FIR maps as well as in all IRAC 4.5 microns maps. To further assess the coherence of the shapes of isophotes across galactic disks, I built a quantitative indicator of the difference in shape between two ellipses with same center and same semi-major axis.I defined an acceptable level of difference between isophote shapes, by comparing disk orientations found in litterature. Using this level, I found regions inside the galactic disks where the isophotal shapes are similar. From these, I extracted one disk orientation per wavelength band. I found in the vast majority of the disk galaxy maps, be it dominated by stellar or dust emission, that a large fraction of the isophotes I extracted are coherent with the idea of an underlying disk. Comparing, for each galaxy, disk orientations extracted at all wavelengths, I found evidence in 20 galaxies out of 46, that on radial ranges as large as 1/3 of the visible disk (as measured by R25), the shapes of isophotes are morphologically similar. Thus for these 20 galaxies I devised consistent disk orientations both for the stellar and dust content. These 20 galaxies are less luminous, less emitting in the IR w.r.t. the optical, less barred, and characterized by later stage types than average. I also found that the disk orientations devised by my photometric method yield results more similar to H-alpha kinematic orientations than other photometric studies based on a single isophote level.Using the orientations I found and H-alpha dynamics disk orientations, I averaged azimuthally surface brightnesses to produce radial spectral energy distributions (SED) profiles. Once fitted with a cosmic dust emission model, they resulted in radial profiles of dust and stellar content properties. I found the dust intercepted power to be proportionnal to the product of the total dust mass and the average ISRF shining on dust. This former quantity is better correlated with the bolometric stellar luminosity than any of the dust mass or the dust heating ISRF separately. Thus the old stellar populations may be an important heating source for dust. The power intercepted by dust is also very well correlated with the total infrared power. The dust intercepts a larger quantity of power coming from stars in more actively star forming galaxies.Dust exhibit radial mass surface density profiles less well described by Sersic functions than stellar ones. When both profiles are well fitted by Sersic functions, stellar density profiles have smaller half mass radii than the isophotal optical radius (R25) separately in later type galaxies, but also in more quiescent galaxies. Sersic index and half mass radius distributions have larger widths for dust than for stellar surface density profiles.I also found that the ratio of dust over stellar surface density is an important factor to explain the variations with galactic morphological type of the ratio of dust intercepted power over the power emitted by old stellar populations. This later link could be intertwined with spiral structure strength in stage types later than 2.
Download or read book A Near Infrared Atlas of Spiral Galaxies written by D. M.. Elmegreen and published by . This book was released on 1981 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spiral Galaxies written by R. Sybe de Jong and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Spiral Galaxies written by Matthijs Henk Rembrandt Wevers Wevers and published by . This book was released on 1984 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Spiral Galaxies Using Hl Synthesis Observations and Photographic Surface Photometry written by Bart M. Wevers and published by . This book was released on 1984 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
