Examinando por Autor "Charlot, S."

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Acceso Abierto
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
Spatially Resolved Analysis of Neutral Winds, Stars, and Ionized Gas Kinematics with MEGARA/GTC: New Insights on the Nearby Galaxy UGC 10205
(Institute of Physics, 2020-02-06) Catalán Torrecilla, C.; Castillo Morales, Á; Gil de paz, A.; Gallego, J.; Carrasco, E.; Iglesias Páramo, J.; Cedazo, R.; Chamorro Cazorla, M.; Pascual, S.; García Vargas, M. L.; Cardiel, N.; Gómez Álvarez, P.; Pérez Calpena, A.; Martínez Delgado, I.; Dullo, B. T.; Coelho, P. R. T.; Bruzual, G.; Charlot, S.; Agencia Estatal de Investigación (AEI); Universidad Nacional Autónoma de México (UNAM); 0000-0002-8067-0164; 0000-0003-4964-3245; 0000-0001-6150-2854; 0000-0003-1439-7697; 0000-0003-2726-6370; 0000-0002-9351-6051; 0000-0002-9334-2979; 0000-0002-4140-0110; 0000-0003-1846-4826; 0000-0002-6971-5755; 0000-0003-3458-2275; Coelho, P. R. T. [0000-0003-1846-4826]; Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737
We present a comprehensive analysis of the multiphase structure of the interstellar medium (ISM) and the stellar kinematics in the edge-on nearby galaxy UGC 10205 using integral field spectroscopy (IFS) data taken with MultiEspectrografo en GTC de Alta Resolucion para Astronomia (MEGARA) at the GTC. We explore both the neutral and the ionized gas phases using the interstellar Na I D doublet absorption (LR-V setup, R similar to 6000) and the Ha emission line (HR-R setup, R similar to 18000), respectively. The high-resolution data show the complexity of the Ha emission-line profile revealing the detection of up to three kinematically distinct gaseous components. Despite of this fact, a thin-disk model is able to reproduce the bulk of the ionized gas motions in the central regions of UGC 10205. The use of asymmetric drift corrections is needed to reconciliate the ionized and the stellar velocity rotation curves. We also report the detection of outflowing neutral gas material blueshifted by similar to 87 km s(-1). The main physical properties that describe the observed outflow are a total mass M-out = (4.55 +/- 0.06) x 10(7) M-circle dot and a coldgas mass outflow rate (M)over dot(out) = 0.78 +/- 0.03 M-circle dot yr(-1). This work points out the necessity of exploiting highresolution IFS data to understand the multiphase components of the ISM and the multiple kinematical components in the central regions of nearby galaxies.