An Accurate Distance to High-Velocity Cloud Complex C

Abstract

We report an accurate distance of d = 10+/-2.5kpc to the high-velocity cloud Complex C. Using high signal-to-noise Keck/HIRES spectra of two horizontal-branch stars, we have detected CaII K absorption lines from the cloud. Significant non-detections toward a further 3 stars yield robust lower distance limits. The resulting HI mass of Complex C is 4.9^{+2.8}_{-2.2} x 10^6 Msun; a total mass of 8.2^{+4.6}_{-2.6} x 10^6 Msun is implied, after corrections for helium and ionization. At 10kpc, Complex C has physical dimensions 3x15 kpc, and if it is as thick as it is wide, then the average density is log<n> ~ -2.5. We estimate the contribution of Complex C to the mass influx may be as high as ~0.14 Msun/yr.

Resubmitted to ApJ. 8 figures

References in corpus (42)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• Dwarf Galaxies of the Local Group
• Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
• Abundance Gradients and the Formation of the Milky Way
• A New Milky Way Dwarf Galaxy in Ursa Major
• Highly-Ionized High-Velocity Gas in the Vicinity of the Galaxy
• Multi-Phase Galaxy Formation: High Velocity Clouds and the Missing Baryon Problem
• A Faint New Milky Way Satellite in Bootes
• The Wisconsin H-Alpha Mapper Northern Sky Survey
• A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite?
• Distances and Metallicities of High- and Intermediate-Velocity Clouds
• The cold gaseous halo of NGC 891
• The Magellanic Stream, High-Velocity Clouds and the Sculptor Group
• Theoretical isochrones in several photometric systems II. The Sloan Digital Sky Survey ugriz system
• Distances to Galactic high-velocity clouds. I. Cohen Stream, complex GCP, cloud g1
• Distances to Galactic high-velocity clouds. Complex C
• Complex C: A Low-Metallicity High-Velocity Cloud Plunging into the Milky Way
• Blue horizontal branch stars in the Sloan Digital Sky Survey: I. Sample selection and structure in the Galactic halo
• Cooling flows within galactic haloes: the kinematics and properties of infalling multi-phase gas
• The Local Group dwarf Leo T: HI on the brink of star formation
• Highly Ionized Gas Surrounding High Velocity Cloud Complex C
• Where are the ``Missing'' Galactic Baryons?
• Galactic chemical abundance evolution in the solar neighborhood up to the Iron peak
• WHAM Observations of H-alpha Emission from High Velocity Clouds in the M, A, and C Complexes
• A confirmed location in the Galactic halo for the high-velocity cloud 'chain A'
• Westerbork HI observations of high-velocity clouds near M31 and M33
• Molecular Hydrogen in High-Velocity Clouds
• A Survey of FUSE and HST Sightlines through High-Velocity Cloud Complex C
• The Galactic Nature of High Velocity Cloud Complex WB
• High-Velocity Cloud Complex C: Galactic Fuel or galactic Waste?
• Metallicity and Ionization in High Velocity Cloud Complex C
• HI spectra and column densities toward HVC and IVC probes
• Ongoing Galactic Accretion: Simulations and Observations of Condensed Gas in Hot Halos
• An automated search for high-velocity clouds in the Leiden/Dwingeloo Survey
• Deriving the Metallicity Distribution Function of Galactic Systems
• High Velocity Cloud Complex H: A Satellite of the Milky Way in a Retrograde Orbit?
• The Absence of Stars in Compact High-Velocity Clouds
• The Gaseous Trail of the Sagittarius Dwarf Galaxy
• The Cosmological Significance of High-Velocity Cloud Complex H
• SDSS Survey for Resolved Milky Way Satellite Galaxies II: High-Velocity Clouds in the Early Data Release
• A Search for Stellar Populations in High Velocity Clouds
• Are HVCs Produced in Galactic Fountains?

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