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: http://www.stsci.edu/~inr/thisweek1/2014/thisweek258.html
Дата изменения: Mon Sep 22 21:52:59 2014 Дата индексирования: Sun Apr 10 21:34:43 2016 Кодировка: Поисковые слова: quasar |
Program Number | Principal Investigator | Program Title |
---|---|---|
12884 | Harald Ebeling, University of Hawaii | A Snapshot Survey of The Most Massive Clusters of Galaxies |
12893 | Ronald L Gilliland, The Pennsylvania State University | Study of Small and Cool Kepler Planet Candidates with High Resolution Imaging |
13285 | Richard Edelson, University of Maryland | WFC3 imaging and galaxy subtraction for the Kepler BL Lac W2R1926+42 |
13317 | Dan Coe, Space Telescope Science Institute - ESA | Infrared Grism Confirmation of a Strongly Lensed z ~ 11 Candidate: MACS0647-JD |
13330 | Bradley M Peterson, The Ohio State University | Mapping the AGN Broad Line Region by Reverberation |
13332 | Seth Redfield, Wesleyan University | A SNAP Survey of the Local Interstellar Medium: New NUV Observations of Stars with Archived FUV Observations |
13335 | Adam Riess, The Johns Hopkins University | HST and Gaia, Light and Distance |
13343 | David Wittman, University of California - Davis | Probing Dark Matter with a New Class of Merging Clusters |
13364 | Daniela Calzetti, University of Massachusetts - Amherst | LEGUS: Legacy ExtraGalactic UV Survey |
13377 | Andrea Mehner, European Southern Observatory - Chile | Essential UV Observations of Eta Carinae's Change of State |
13386 | Steven A. Rodney, The Johns Hopkins University | Frontier Field Supernova Search |
13397 | Luciana C. Bianchi, The Johns Hopkins University | Understanding post-AGB Evolution: Snapshot UV spectroscopy of Hot White Dwarfs |
13407 | Crystal Martin, University of California - Santa Barbara | COS Gas Flows: Challenging the Optical Perspective |
13420 | Guillermo Barro, University of California - Santa Cruz | The progenitors of quiescent galaxies at z~2: precision ages and star-formation histories from WFC3/IR spectroscopy |
13430 | Sandra Greiss, The University of Warwick | The temperatures, masses and pulsation modes of three ZZ Cetis in the Kepler field |
13441 | Rachael Tomasino, University of Denver | Co-latitudinal Radial Veloctiy Profile Confirmation Via Differential Proper Motion of the Bipolar Egg Nebula |
13442 | R. Brent Tully, University of Hawaii | The Geometry and Kinematics of the Local Volume |
13454 | Pierre Kervella, Observatoire de Paris | The parallax and mass of the binary classical Cepheid V1334 Cyg |
13459 | Tommaso L. Treu, University of California - Los Angeles | The Grism Lens-Amplified Survey from Space {GLASS} |
13467 | Jacob L. Bean, University of Chicago | Follow The Water: The Ultimate WFC3 Exoplanet Atmosphere Survey |
13481 | Emily Levesque, University of Colorado at Boulder | Calibrating Multi-Wavelength Metallicity Diagnostics for Star-Forming Galaxies |
13677 | Saul Perlmutter, University of California - Berkeley | See Change: Testing time-varying dark energy with z>1 supernovae and their massive cluster hosts |
13686 | Adam Riess, The Johns Hopkins University | The Longest Period Cepheids, a bridge to the Hubble Constant |
13691 | Wendy L. Freedman, Carnegie Institution of Washington | CHP-II: The Carnegie Hubble Program to Measure Ho to 3% Using Population II |
13739 | Evan D. Skillman, University of Minnesota - Twin Cities | Is the First Epoch of Star Formation in Satellite Galaxies Universal? - Part II |
13794 | John T. Clarke, Boston University | Seasonal Dependence of the Escape of Water from the Martian Atmosphere |
GO 13330: Mapping the AGN Broad Line Region by Reverberation
![]() Simulations of the appearance and velocity structure within an AGN disk (see Keith Horne's webpage ). |
Active galaxies (AGNs) are generally luminous systems, characterised by the presence of strong nuclear emission lines of numerous species including H, He I, He II, and Fe, Ca, O, C and S over a range of ionisations. These features originate from gas clouds in the nuclear regions, with the energy supplied through accretion onto a central massive black hole. The high-temperature, rapidly-rotating gas clouds nearest the central engine are responsible for producing broad emission lines (hence, the "Broad Line Region"). The structure of the BLR can be discerned using a technique known as reverberation mapping: variations in the accretion rate lead to fluctuations in luminosity; those variations lead, in turn, to variations in the photoionisation of the BLR, and corresponding changes in spectral line strengths and velocities; monitoring those changes, and correlating them with the photometric variability of the central source, measures the light travel time from nucleus to BLR gas, and hence maps the size of the BLR. The present prorgam will use the Cosmic Origins Spectrograph to undertake systematic monitoring of the nuclear regions of the Seyfert I galaxy, NGC 5548. The first observations were taken on February 2nd 2014 and the program reached its conclusion in late Jul, having taken observations at a cadence of ~one orbit per day for 179 days. The present observations target white dwarf reference stars. |
GO 13364: LEGUS: Legacy ExtraGalactic UV Survey
GO 13459: The Grism Lens-Amplified Survey from Space {GLASS}
GO 13794: Seasonal Dependence of the Escape of Water from the Martian Atmosphere