Program Number | Principal Investigator | Program Title |
---|---|---|
12880 | Adam Riess, The Johns Hopkins University | The Hubble Constant: Completing HST's Legacy with WFC3 |
13049 | Tuan Do, University of Toronto | Measuring the physical properties of the Milky Way nuclear star cluster with proper motions |
13286 | Ryan Foley, University of Illinois at Urbana - Champaign | Understanding the Progenitor Systems, Explosion Mechanisms, and Cosmological Utility of Type Ia Supernovae |
13310 | Nicholas P. Abel, University of Cincinnati Main Campus | The life and death of H2 in a UV-rich environment - Towards a better understanding of H2 excitation and destruction |
13330 | Bradley M Peterson, The Ohio State University | Mapping the AGN Broad Line Region by Reverberation |
13335 | Adam Riess, The Johns Hopkins University | HST and Gaia, Light and Distance |
13344 | Adam Riess, The Johns Hopkins University | A 1% Measurement of the Distance Scale with Perpendicular Spatial Scanning |
13362 | Amy Bonsor, Institut de Planetologie et d'Astrophysique de Grenoble | Constraining the structure of the Kappa Cr B planetary system, a unique subgiant, orbited by two companions and a debris disc |
13364 | Daniela Calzetti, University of Massachusetts - Amherst | LEGUS: Legacy ExtraGalactic UV Survey |
13379 | Antonino Paolo Milone, Australian National University | Multiple stellar populations in the young Large Magellanic Cloud cluster NGC1856 |
13408 | Jon Mauerhan, University of California - Berkeley | Constraining the Physical Properties of LBV Nebulae in the Galactic Center Environment |
13417 | David P. Bennett, University of Notre Dame | Measuring the Exoplanet Mass Function Beyond the Snow-Line |
13449 | Marla C. Geha, Yale University | A Non-Universal Initial Mass Function in the Ultra-Faint Galaxy Coma Berenices |
13459 | Tommaso L. Treu, University of California - Santa Barbara | The Grism Lens-Amplified Survey from Space {GLASS} |
13463 | Kailash C. Sahu, Space Telescope Science Institute | Detecting and Measuring the Masses of Isolated Black Holes and Neutron Stars through Astrometric Microlensing |
13467 | Jacob L. Bean, University of Chicago | Follow The Water: The Ultimate WFC3 Exoplanet Atmosphere Survey |
13472 | Wendy L. Freedman, Carnegie Institution of Washington | The Hubble Constant to 1%? STAGE 4: Calibrating the RR Lyrae PL relation at H-Band using HST and Gaia Parallax Stars |
13496 | Jennifer Lotz, Space Telescope Science Institute | HST Frontier Fields - Observations of MACSJ0416.1-2403 |
13621 | Ariel Goobar, Stockholm University | The closest reddened Type Ia supernova in the HST life time |
13623 | Zolt Levay, Space Telescope Science Institute | Hubble Heritage observations of NGC 2174 for HST 24th anniversary |
GO 12880: The Hubble Constant: Completing HST's Legacy with WFC3
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 web page). |
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 observatons are spread over the next 6 months, with one orbit per day for 179 days. |
GO 13364: LEGUS: Legacy ExtraGalactic UV Survey
GO 13467: Follow The Water: The Ultimate WFC3 Exoplanet Atmosphere Survey