Examinando por Autor "Finkelstein, S."

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Another Servicing Mission to Extend Hubble Space Telescope’s Science past the Next Decade
(American Astronomical Society, 2019-09-30) López Morales, M.; France, K.; Ferraro, F. R.; Chandar, R.; Finkelstein, S.; Charlot, S.; Ballester, G. E.; Bersten, M. C.; Diego, J. M.; Folatelli, T.; García Senz, D.; Giavalisco, M.; Jansen, R. A.; Kelly, P. L.; Maccarone, Thomas J.; Redfield, S.; Ruiz Lapuente, P.; Shore, S.; Kallivayalil, N.; Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737
The Hubble Space Telescope has produced astonishing science over the past thirty years. Hubble's productivity can continue to soar for years to come provided some worn out components get upgraded. While powerful new ground-based and space telescopes are expected to come online over the next decade, none of them will have the UV capabilities that make Hubble a unique observatory. Without Hubble, progress in UV and blue optical astrophysics will be halted. Observations at these wavelengths are key for a range of unresolved astrophysics questions, ranging from the characterization of solar system planets to understanding interaction of galaxies with the intergalactic medium and the formation history of the universe. Hubble will remain our only source of high-angular resolution UV imaging and high-sensitivity UV spectroscopy for the next two decades, offering the ability for continued unique science and maximizing the science return from complementary observatories. Therefore, we recommend that NASA, ESA, and the private sector study the scientific merit, technical feasibility, and risk of a new servicing mission to Hubble to boost its orbit, fix aging components, and expand its instrumentation. Doing so would: 1) keep Hubble on its path to reach its unmet full potential, 2) extend the mission's lifetime past the next decade, which will maximize the synergy of Hubble with other upcoming facilities, and 3) enable and enhance the continuation of scientific discoveries in UV and optical astrophysics.
Acceso Abierto
JWST/MIRI Simulated Imaging: Insights into Obscured Star Formation and AGNs for Distant Galaxies in Deep Surveys
(IOP Science Publishing, 2021-02-19) Yang, C.; Papovich, C.; Bagley, M. B.; Buat, V.; Burgarella, D.; Dickinson, M.; Elbaz, D.; Finkelstein, S.; Fontana, A.; Grogin, N. A.; Jung, I.; Kartaltepe, J. S.; Kirkpatrick, A.; Koekemoer, A. M.; Pérez González, P. G.; Pirzkal, N.; Yung, L. Y. A.; Yang, C. [0000-0001-8835-7722]; Papovich, C. [0000-0001-7503-8482]; Bagley, M. B. [0000-0002-9921-9218]; Buat, V. [0000-0003-3441-903X]; Burgarella, D. [0000-0002-4193-2539]; Dickinson, M. [0000-0001-5414-5131]; Finkelstein, S. L. [0000-0001-8519-1130]; Fontana, A. [0000-0003-3820-2823]; Grogin, N. A. [0000-0001-9440-8872]; Jung, I. [0000-0003-1187-4240]; Kartaltepe, J. S. [0000-0001-9187-3605]; Kirkpatrick, A. [0000-0002-1306-1545]; Koekemoer, A. M. [0000-0002-6610-2048]; Pérez González, P. G. [0000-0003-4528-5639]; Yung, L. Y. A. [0000-0003-3466-035X]
The James Webb Space Telescope MIRI instrument will revolutionize extragalactic astronomy with unprecedented sensitivity and angular resolution in mid-IR. Here we assess the potential of MIRI photometry to constrain galaxy properties in the Cosmic Evolution Early Release Science (CEERS) survey. We derive estimated MIRI fluxes from the spectral energy distributions (SEDs) of real sources that fall in a planned MIRI pointing. We also obtain MIRI fluxes for hypothetical active galactic nucleus (AGN)–galaxy mixed models varying the AGN fractional contribution to the total IR luminosity (fracAGN). Based on these model fluxes, we simulate CEERS imaging (3.6 hr exposure) in six bands from F770W to F2100W using mirisim and reduce these data using jwst pipeline. We perform point-spread-function-matched photometry with tphot and fit the source SEDs with x-cigale, simultaneously modeling photometric redshift and other physical properties. Adding the MIRI data, the accuracy of both redshift and fracAGN is generally improved by factors of ≳2 for all sources at z ≲ 3. Notably, for pure-galaxy inputs (fracAGN = 0), the accuracy of fracAGN is improved by ∼100 times thanks to MIRI. The simulated CEERS MIRI data are slightly more sensitive to AGN detections than the deepest X-ray survey, based on the empirical LX–L6 μm relation. Like X-ray observations, MIRI can also be used to constrain the AGN accretion power (accuracy ≈0.3 dex). Our work demonstrates that MIRI will be able to place strong constraints on the mid-IR luminosities from star formation and AGNs and thereby facilitate studies of the galaxy/AGN coevolution.