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  3. ASTRONOMY COLLOQUIUM<br>The ALFALFA Census of Gas-Bearing Galaxies at z=0</br>
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ASTRONOMY COLLOQUIUM<br>The ALFALFA Census of Gas-Bearing Galaxies at z=0</br>

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        3. <b>ASTRONOMY COLLOQUIUM</b><br>Tracing the Cosmic Shutdown of Star Formation in Massive Galaxies
        4. <b>ASTRONOMY COLLOQUIUM</b><br>The Effects of Magnetic Field Morphology on the Determination of Oxygen and Iron Abundances in the Solar Photosphere
        5. <b>ASTRONOMY COLLOQUIUM</b><br>Star Formation Across Space
        6. <b>ASTRONOMY COLLOQUIUM</b><br>Lonely Galaxies: The Baryon Content of Isolated Dwarf Galaxies
        7. <b>ASTRONOMY COLLOQUIUM</b><br>Choose Your Own Adventure: Multiplicity of Planets Among the Smallest Stars
        8. <b>ASTRONOMY COLLOQUIUM</b><br>Why the Invisible Reservoir of Gas Around Galaxies Counts in Galaxy Evolution
        9. <b>ASTRONOMY COLLOQUIUM</b><br>A Galaxy-Scale Fountain of Cold Molecular Gas Pumped by a Black Hole
        10. ASTRONOMY COLLOQUIUM
        11. ASTRONOMY COLLOQUIUM<br>Better Living Through Computation: Exploring the First Generations of Galaxies with Large-Scale Simulations
        12. ASTRONOMY COLLOQUIUM<br>The Search for Earth 2.0
        13. ASTRONOMY COLLOQUIUM<br>The Fast and Furious Lives of High Velocity Clouds
        14. ASTRONOMY COLLOQUIUM<br>Supernovae as Drivers of Dust Evolution in Galaxies
        15. ASTRONOMY COLLOQUIUM<br>How to Measure the Composition of Planet-Forming Material
        16. ASTRONOMY COLLOQUIUM<br>Direct Imaging of Extrasolar Planets and the Gemini Planet Imager
        17. ASTRONOMY COLLOQUIUM<br>Blowing in the Quasar Wind: Feedback from Black Hole Outflows in Major Galaxy Mergers
        18. ASTRONOMY COLLOQUIUM<br>Magellan/MDM Colloquium: Department Members Share Their Current Work Using Magellan/MDM Observatories
        19. ASTRONOMY COLLOQUIUM<br>The Fisk-Vanderbilt Masters-to-PhD Bridge Program: A Model for Increasing Diversity at the PhD Level in Physics & Astronomy
        20. ASTRONOMY COLLOQUIUM<br>Science, Symphony, and the Northern Lights
        21. ASTRONOMY COLLOQUIUM<br>Observing the Formation of Planetary Diversity
        22. ASTRONOMY COLLOQUIUM<br>Lies, Damned Lies, and Statistics: Empirical Constraints on Theories of Planet Formation
        23. ASTRONOMY COLLOQUIUM<br>Black People in Astronomy: Why So Few?
        24. ASTRONOMY COLLOQUIUM <br> Hot on the Trail of Warm Planets Orbiting Cool Stars
        25. ASTRONOMY COLLOQUIUM<br>Galaxy Clusters as Cosmological and Astrophysical Probes
        26. ASTRONOMY COLLOQUIUM <br> Discovery of a Thorne-Zytkow Object Candidate in The Small Magellanic Cloud
        27. ASTRONOMY COLLOQUIUM<br>Where's the Matter? (Tales from the Milky Way's Destructive Past)
        28. ASTRONOMY COLLOQUIUM<br>Measuring the Mass-Radius Relation of Neutron Stars
        29. ASTRONOMY COLLOQUIUM <br> Accretion Disk Outbursts: MHD Simulations (Finally) Confront Reality
        30. ASTRONOMY COLLOQUIUM <br> The Observability of Recoiling Black Holes as Offset Quasars
        31. ASTRONOMY COLLOQUIUM<br>Black Hole Masses in Active Galaxies
        32. ASTRONOMY COLLOQUIUM<br>Using Multiwavelength Variability Studies to Probe the Disk-Jet Connection of Fermi Blazars
        33. ASTRONOMY COLLOQUIUM<br>X-ray Reverberation Mapping in AGN
        34. 3rd Annual Astronomy Undergraduate Poster Session
        35. ASTRONOMY COLLOQUIUM<br>High-Energy-Density Astrophysics in the Laboratory
        36. SPECIAL ASTRONOMY COLLOQUIUM<br>Ralph Baldwin Prize in Astrophysics and Space Sciences<br>Lonely Massive Stars</br>
        37. ASTRONOMY COLLOQUIUM<br>Live Fast Die Young: The Evolution of Massive Stars towards their Death</br>
        38. ASTRONOMY COLLOQUIUM<br>Watching a Little Gas Cloud on its Way into the Galactic Supermassive Black Hole
        39. ASTRONOMY COLLOQUIUM<br>Dwarf Galaxies as Cosmological Probes
        40. SPECIAL ASTRONOMY COLLOQUIUM<br>The Magellan and MDM Observatories / Michigan Astronomy
        41. ASTRONOMY COLLOQUIUM<br>Seeing Worlds in Grains of Sand
        42. ASTRONOMY COLLOQUIUM<br>Mohler Prize Lecture<br>Lighting up the Universe: Witnessing Cosmic Dawn</br>
        43. ASTRONOMY COLLOQUIUM<br>The ALFALFA Census of Gas-Bearing Galaxies at z=0</br>
        44. ASTRONOMY COLLOQUIUM<br>Accretion Disk Outbursts: MHD Simulations (Finally) Confront Reality
        45. ASTRONOMY COLLOQUIUM<br>3D Spectroscopy of Giant H II Regions in Nearby Spiral Galaxies</br>
        46. ASTRONOMY COLLOQUIUM<br>Star Clusters and High Mass X-Ray Binaries in Nearby Spirals, Mergers, and Starburst Galaxies
        47. PUBLIC ASTRONOMY DISTINGUISHED ALUMNUS COLLOQUIUM | Cracking the Cosmic Code
        48. ASTRONOMY DISTINGUISHED ALUMNUS COLLOQUIUM
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Thursday, February 20, 2014
5:00 AM
807 Dennison Building

Capitalizing on the huge collecting area of the Arecibo telescope and the survey capability of the 7-beam Arecibo L-band Feed Array (ALFA), the Arecibo Legacy Fast ALFA (ALFALFA) extragalactic HI 21cm line survey is producing a census of HI-bearing objects out to z < 0.06. ALFALFA provides the first robust count of gas-bearing halos over a cosmologically significant volume. I will review first results of a coordinated multiwavelength program designed to probe how some massive galaxies maintain huge gas reservoirs without converting their gas into stars and how isolated low mass halos are able to retain some HI gas despite their fragile thermal state and shallow potential wells.

Colloquia are generally preceded by tea and cookies at 3:30 in the Owl room (Dennison 845). For more information, please contact astro.colloquia@umich.edu.

Astronomy Colloquia listings for Winter 2014.

Speaker:
Physics
Randall Lab and Homer A. Neal Lab
450 Church Street
Ann Arbor, MI 48109-1040
734.764.4437
734.763.9694
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