197,303 research outputs found

    The Lawyer and the Scientific Community—Procuring Basic Research

    Get PDF
    A major open question in astrophysics concerns the formation of highly collimated beams of matter and electromagnetic radiation, so-called relativistic jets, emerging from active galactic nuclei (AGN) in the center of certain galaxies. It is not known how, or why, these jets are formed nor how they maintain their collimated state for such large distances. For long it has been thought that jets can only be hosted in large, elliptical galaxies, though quiterecently AGNs have been discovered that contradict these beliefs. These objects are called radio-loud narrow-line Seyfert 1 galaxies (RLNLSy1). In this thesis an AGN belonging to this class is analysed. Utilising an X-ray spectral fitting package (XSPEC), data from two separate observations obtained from the X-ray Multi-Mirror Mission observatory (XMM-Newton) of the radio-loud narrow-line Seyfert 1 galaxy SDSS J154817.92+351128.0 are fitted through the use of different models and analysed in the energy region of 0.3 keV to 10 keV. The purpose is to disentangle the emission from the light-emitting accretion disk surrounding the central supermassive black hole(SMBH) and the emission from a possible jet, as well as to determine their properties. The results indicate a strong presence of a jet while still maintaining a visible spectrum from the accretion disk. No sign of the Fe line, usually seen in radio-quiet NLSy1s, can be detected, even though the data is not of sufficientquality to exclude the possibility of detection. Furthermore, considerable amounts of enhanced emission below 2 keV is observed, a so-called soft excess. The soft excess could be explained by inverse comptonisation of the light emitted from the disk and/or reflections in the disk. Our results confirm the presence of powerful relativistic jets emerging from J1548+3511. The wider implications of jet formation are further discussed

    Audit report on the Heart of Iowa Regional Transit Agency, Des Moines, Iowa, for the year ended June 30, 2012

    Get PDF
    Audit report on the Heart of Iowa Regional Transit Agency, Des Moines, Iowa, for the year ended June 30, 201

    Survey of AIDS Prevention Funders: Which Programs Are Funded, and Why?, A?

    Get PDF
    This survey of foundations across the United States asked questions about the amount of money they spend on AIDS and HIV prevention, the types of prevention projects and populations their grants served, and the sources of AIDS information used by the foundation staff. The results were then compared to the types of projects known to be effective and to the populations most at risk for HIV infection.These organizations funded a diverse range of HIV prevention programs, with a total of 583 grants worth over $8.1 million. This represents almost a quarter of all AIDS-related funding by foundations in the United States

    Relationship of Local, State, and Federal Participation in Public Library Development

    Get PDF
    published or submitted for publicatio

    Funding the Future: Resources for Adolescent Reproductive and Sexual Health Programs in Developing Countries

    Get PDF
    Provides a directory of over 90 foundations, agencies, and organizations that support adolescent reproductive and sexual health related programs in developing countries, through direct and/or indirect financing, technical assistance, and information

    The Background of the Wagner National Health Bill

    Get PDF

    Intergovernmental Fiscal Relations in Georgia

    Get PDF
    This report documents the intergovernmental fiscal system in Georgia, with a focus on the expenditure, revenue, and intergovernmental grant system in the state. FRC Report 14

    Iowa State Fair Authority, Independent Auditor's Reports, Basic Financial Statements and Supplementary Information, Schedule of Findings for the Year Ending October 31, 2005

    Get PDF
    Audit report of the Iowa State Fair Authority for the year ending October 31, 200
    • …
    corecore