Download or read book Evidence for a Multiphase Ism in Early Type Galaxies and Elliptical Galaxies with Strong Radio Continuum written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have observed NGC 1316 (Fornax A) with the ROSAT HRI. In this paper, we present the results of these observations and we complement them with the spectral analysis of the archival PSPC data. The spectral properties suggest the presence of a significant component of thermal X-ray emission (greater than 60%), amounting to approx. 10(exp 9) solar mass of hot ISM. Within 3 feet from the nucleus of NGC 1316, the HRI X-ray surface brightness falls as r(exp -2) following the stellar light. In the inner approx. 30 inch., however, the X-ray surface brightness is significantly elongated, contrary to the distribution of stellar light, which is significantly rounder within 10 inch. This again argues for a non-stellar origin of the X-ray emission. This flattened X-ray feature is suggestive of either the disk-like geometry of a rotating cooling flow and/or the presence of extended, elongated dark matter. By comparing the morphology of the X-ray emission with the distribution of optical dust patches, we find that the X-ray emission is significantly reduced at the locations where the dust patches are more pronounced, indicating that at least some of the X-ray photons are absorbed by the cold ISM. We also compare the distribution of the hot and cold ISM with that of the ionized gas, using recently obtained H(sub alpha) CCD data. We find that the ionized gas is distributed roughly along the dust patches and follows the large scale X-ray distribution at r greater than 1 foot from the nucleus. However, there is no one-to-one correspondence between ionized gas and hot gas. Both morphological relations and kinematics suggest different origins for hot and cold ISM. The radio jets in projection appear to pass perpendicularly through the central X-ray ellipsoid. Comparison of thermal and radio pressures suggests that the radio jets are confined by the surrounding hot gaseous medium. Kim, Dong Woo Goddard Space Flight Center...
Download or read book Radio Continuum and Star Formation in Elliptical Galaxies written by Danielle M. Lucero and published by . This book was released on 2004 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interstellar Medium in External Galaxies written by David J. Hollenbach and published by . This book was released on 1990 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Multiphase Medium of Elliptical Galaxies and Clusters of Galaxies written by David Allen White and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fundamental Plane of Early type Galaxies in the Intermediate Redshift Cluster CL1358 62 written by Daniel D. Kelson and published by . This book was released on 1998 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elliptical Galaxies Associated with Extended Radio Sources written by Kerry Andrew Kingham and published by . This book was released on 1962 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Distribution and Motion of Interstellar Matter in Galaxies written by Lodewijk Woltjer and published by . This book was released on 1962 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radio Interferometric Investigations of Compact Components in Active Spiral and Seyfert Galaxy Nuclei written by John B. Carlson and published by . This book was released on 1977 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lectures on Radio Galaxies and Quasistellar Objects Delivered at the Summer School in Relativistic Astrophysics and Cosmology Held at Bangalore 1966 written by E. Margaret Burbidge and published by . This book was released on 1968 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interstellar Medium in the Edge on Galaxy NGC 5907 written by M. Dumke and published by . This book was released on 1999 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Probing Galaxy Evolution Through Deep Radio Continuum Observations written by Hansung Gim and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important questions in modern astrophysics is how galaxies form and evolve. There are numerous processes involved in galaxy evolution, but the stellar mass buildup and supermassive black hole growth are two main drivers in galaxy evolution. Those activities are heavily obscured by dust, so we need another tracer without dust attenuation: low-frequency radio continuum observation. We understand the galaxy evolution through the deep radio continuum observations on the Great Observatories Origins Deep Survey (GOODS)-North, -South, and the COSMOS HI Large Extragalactic Survey (CHILES) fields. Exploiting the multi-wavelength dataset, we define the radio populations such as star-formation (SF) dominated, active galactic nuclei (AGN)-dominated, and passive galaxies by applying new selection criteria. Populations are defined according to the relative contributions of SF and AGN luminosities to the bolometric luminosities of host galaxies and star formation properties. We explore the physical properties of radio populations, interpret their properties in the context of galaxy evolution, and show that our results of radio populations are consistent with the galaxy evolution scenarios. These results are the same for the GOODS and CHILES fields. Our investigation of the radio spectral index and radio-FIR correlation for the GOODS fields show that the radio spectral index is characteristic of each population and the radio-FIR correlation is a robust tracer of star formation activity. The analysis of radio spectral index shows the prominence of steep spectrum sources at faint flux density first as expected in the Euclidean normalized number counts. We also show that the radio spectral index should be calculated by matching the beam sizes of images. The evolution of the radio-FIR correlation in SF-dominated galaxies is not found significantly with our data. On the other hand, the analysis of radio spectral index for the CHILES is not consistent with the result of the GOODS due to the larger difference of beam area. This inconsistency gives important implications for the future works.
Download or read book The Interstellar Medium of Elliptical Galaxies written by Joanna Frances Lees and published by . This book was released on 1992 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Radio Galaxies and Quasars written by Giancarlo Setti and published by . This book was released on 1976 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Radio Continuum of Star forming Galaxies written by Joshua Robert Marvil and published by . This book was released on 2014 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dynamics of the Interstellar Medium in Elliptical Galaxies written by Huw Meredydd Lloyd and published by . This book was released on 1991 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HI and Radio Continuum Studies of Seyfert Galaxies written by David L. Blank and published by . This book was released on 1998 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Formation and Evolution of Elliptical Galaxies written by Richard Joseph Norman Brown and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
