Advanced search×

A High-Metallicity High Velocity Cloud along the MRK 421 Sight Line: A Tracer of Complex M?

Yangsen Yao, J Michael Shull, and Charles W Danforth

Audio, Transactions of the IRE Professional Group on (2011)

We present a new measurement, 0.85-3.5 Z_solar, of the metallicity of high velocity cloud (HVC) Complex M by analyzing ultraviolet spectroscopic observations of the blazar Mrk 421 taken with the Cosmic Origins Spectrograph on the Hubble Space Telescope and the Far Ultraviolet Spectroscopic Explorer. Although an HVC at V_LSR = -131 km/s is not visible in 21 cm emission (logN_HI<3.5 kpc, above the Galactic plane suggest that Complex M is condensed returning gas from a Galactic fountain.

Version: za2963e q8za4 q8zbf q8zcb q8zdc q8ze9 q8zf7 q8zge
View PDF

Similar articles you may find interesting…

  1. Neutrino telescope modelling of Lorentz invariance violation in oscillations of atmospheric neutrinos
    Dean Morgan, Elizabeth Winstanley, ... Lee F Thompson

    Audio, Transactions of the IRE Professional Group on (2007)

    We consider one particular manifestation of the Violation of Lorentz invariance, namely modified dispersion relations for Massive neutrinos. We show how such modified dispersion relations may affect Atmospheric neutrino oscillations. We then consider how neutrino telescopes, Such as ANTARES, may be...
    View PDF
  2. Light Curve Templates and Galactic Distribution of RR Lyrae Stars from Sloan Digital Sky Survey Stripe 82
    Branimir Sesar, Zeljko Ivezic, ... Hubert Lampeitl

    Audio, Transactions of the IRE Professional Group on (2009)

    We present an improved analysis of halo substructure traced by RR Lyrae stars In the SDSS stripe 82 region. With the addition of SDSS-II data, a revised Selection method based on new ugriz light curve templates results in a sample Of 483 RR Lyrae stars that is essentially free of contamination. The...
    View PDF
  3. The Sloan Digital Sky Survey Data Release 7 M Dwarf Spectroscopic Catalog
    Andrew A West, Dylan P Morgan, ... David O Jones

    Audio, Transactions of the IRE Professional Group on (2010)

    We present a spectroscopic catalog of 70,841 visually inspected M dwarfs from The seventh data release (DR7) of the Sloan Digital Sky Survey (SDSS). For each Spectrum, we provide measurements of the spectral type, a number of molecular Bandheads, and the H-alpha, H-beta, H-gamma, H-delta and Ca II K...
    View PDF