Zobrazeno 1 - 10
of 9 599
pro vyhledávání: '"Crenshaw, A"'
Autor:
Falcão, Anna Trindade, Kraemer, S. B., Fischer, T. C., Schmitt, H. R., Feuillet, L., Crenshaw, D. M., Revalski, M., Maksym, W. P., Vestergaard, M., Elvis, M., Gaskell, C. M., Ho, L. C., Netzer, H., Storchi-Bergmann, T., Turner, T. J., Ward, M. J.
We use the Hubble Space Telescope to analyse the extended [O III] 5007A emission in seven bright radio-quiet type 1 quasars (QSO1s), focusing on the morphology and physical conditions of their extended Narrow-Line Regions (NLRs). We find NLRs extendi
Externí odkaz:
http://arxiv.org/abs/2410.16053
Autor:
Hang, Qianjun, Joachimi, Benjamin, Charles, Eric, Crenshaw, John Franklin, Larsen, Patricia, Malz, Alex I., Schmidt, Sam, Yan, Ziang, Zhang, Tianqing, Collaboration, the LSST Dark Energy Science
We investigate the impact of spatial survey non-uniformity on the galaxy redshift distributions for forthcoming data releases of the Rubin Observatory Legacy Survey of Space and Time (LSST). Specifically, we construct a mock photometry dataset degrad
Externí odkaz:
http://arxiv.org/abs/2409.02501
Autor:
Polack, Garrett E., Revalski, Mitchell, Crenshaw, D. Michael, Fischer, Travis C., Schmitt, Henrique R., Kraemer, Steven B., Meena, Beena, Rafelski, Marc
Outflowing gas from supermassive black holes in the centers of active galaxies has been postulated as a major contributor to galactic evolution. To explore the interaction between narrow-line region (NLR) outflows and their host galaxies, we use Hubb
Externí odkaz:
http://arxiv.org/abs/2407.17550
Autor:
Homar, Guillem Megias, Kahn, Steven M., Meyers, Joshua M., Crenshaw, John Franklin, Thomas, Sandrine J.
The Vera C. Rubin Observatory is a unique facility for survey astronomy that will soon be commissioned and begin operations. Crucial to many of its scientific goals is the achievement of sustained high image quality, limited only by the seeing at the
Externí odkaz:
http://arxiv.org/abs/2406.04656
Autor:
Falcone, Julia, Crenshaw, D. Michael, Fischer, Travis C., Meena, Beena, Revalski, Mitchell, Shea, Maura Kathleen, Riffel, Rogemar A., Chapman, Zo, Ferree, Nicolas, Tutterow, Jacob, Davis, Madeline
We have characterized the ionized, neutral, and warm molecular gas kinematics in the Seyfert 1 galaxy NGC 3227 using observations from the Hubble Space Telescope Space Telescope Imaging Spectrograph, Apache Point Observatory's Kitt Peak Ohio State Mu
Externí odkaz:
http://arxiv.org/abs/2405.20162
Autor:
Crenshaw, John Franklin, Kalmbach, J. Bryce, Gagliano, Alexander, Yan, Ziang, Connolly, Andrew J., Malz, Alex I., Schmidt, Samuel J., Collaboration, The LSST Dark Energy Science
Evaluating the accuracy and calibration of the redshift posteriors produced by photometric redshift (photo-z) estimators is vital for enabling precision cosmology and extragalactic astrophysics with modern wide-field photometric surveys. Evaluating p
Externí odkaz:
http://arxiv.org/abs/2405.04740
Autor:
Moskowitz, Irene, Gawiser, Eric, Crenshaw, John Franklin, Andrews, Brett H., Malz, Alex I., Schmidt, Samuel, Collaboration, The LSST Dark Energy Science
Publikováno v:
ApJL 967 L6 (2024)
Large imaging surveys will rely on photometric redshifts (photo-z's), which are typically estimated through machine learning methods. Currently planned spectroscopic surveys will not be deep enough to produce a representative training sample for LSST
Externí odkaz:
http://arxiv.org/abs/2402.15551
Autor:
Crenshaw, John Franklin, Connolly, Andrew J., Meyers, Joshua E., Kalmbach, J. Bryce, Homar, Guillem Megias, Ribeiro, Tiago, Suberlak, Krzysztof, Thomas, Sandrine, Tsai, Te-wei
Publikováno v:
AJ 167 86 (2024)
The Vera C. Rubin Observatory will, over a period of 10 years, repeatedly survey the southern sky. To ensure that images generated by Rubin meet the quality requirements for precision science, the observatory will use an Active Optics System (AOS) to
Externí odkaz:
http://arxiv.org/abs/2402.08094
This study investigated multi-void formation in fused silica using high resolution Finite-Difference-Time-Domain (FDTD) simulations. Despite extensive research dedicated to understanding the mechanisms behind multi-void formation in materials, the fu
Externí odkaz:
http://arxiv.org/abs/2401.14407
Autor:
Fischer, Travis C., Johnson, Megan C., Secrest, Nathan J., Crenshaw, D. Michael, Kraemer, Steven B.
We present recent Very Long Baseline Array (VLBA) 5 GHz radio observations of the nearby, luminous Seyfert 2 galaxy NGC 1068 for comparison to similar VLBA observations made on 1997 April 26. By cross-correlating the positions of emitting regions acr
Externí odkaz:
http://arxiv.org/abs/2306.15047