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Your search keyword '"González-Martín, O."' showing total 7 results
Start Over Author "González-Martín, O." Publisher iop publishing
7 results on '"González-Martín, O."'

1. Deconvolution of JWST/MIRI Images: Applications to an Active Galactic Nucleus Model and GATOS Observations of NGC 5728

Author

Space Telescope Science Institute (US), University of Texas at San Antonio, Ministerio de Ciencia e Innovación (España), Air Force Office of Scientific Research (US), Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Agencia Nacional de Investigación y Desarrollo (Chile), Ministry of Education, Science and Technological Development (Serbia), Leist, M. T. [0000-0003-4975-2046], Packham, C. [0000-0001-7827-5758], Rosario, D.J.V. [0000-0002-0001-3587], Hope, D. A. [0000-0002-7957-7018], Alonso-Herrero, A. [0000-0001-6794-2519], Hicks, E.K.S. [0000-0002-4457-5733], #NODATA#, Zhang, L. [0000-0003-4937-9077], Davies, R. [0000-0003-4949-7217], Díaz-Santos, T. [0000-0003-0699-6083], González-Martín, O. [0000-0002-2356-8358], Bellocchi, E. [0000-0001-9791-4228], Boorman, P. G. [0000-0001-9379-4716], Combes, F. [0000-0003-2658-7893], García-Bernete, I. [0000-0002-9627-5281], García-Burillo, S. [0000-0003-0444-6897], García-Lorenzo, B. [0000-0002-7228-7173], Ichikawa, K. [0000-0002-4377-903X], Imanishi, M. [0000-0001-6186-8792], Jefferies, S. M. [0000-0002-9580-5615], García-Labiano, Francisco [0000-0002-0690-8824], Levenson, N. A. [0000-0003-4209-639X], Nikutta, R. [0000-0002-7052-6900], Pereira-Santaella, Miguel [0000-0002-4005-9619], Ramos Almeida, C. [0000-0001-8353-649X], Ricci, C. [0000-0001-5231-2645], Rigopoulou, D. [0000-0001-6854-7545], Schaefer, W. [0009-0008-9534-4661], Stalevski, M. [0000-0001-5146-8330], Fuller, L. [0000-0003-4809-6147], Izumi, T. [0000-0001-9452-0813], Shimizu, T. [0000-0002-2125-4670], Leist, M. T., Packham, C., Rosario, D. J.V., Hope, D. A., Alonso-Herrero, A., Hicks, E.K.S., Hönig, S., Zhang, L., Davies, R., Díaz-Santos, T., González-Martín, O., Bellocchi, E., Boorman, P. G., Combes, F., García-Bernete, I., García-Burillo, S., García-Lorenzo, B., Haidar, H., Ichikawa, K., Imanishi, M., Jefferies, S. M., García-Labiano, Francisco, Levenson, N. A., Nikutta, R., Pereira-Santaella, Miguel, Ramos Almeida, C., Ricci, C., Rigopoulou, D., Schaefer, W., Stalevski, M., Ward, M. J., Fuller, L., Izumi, T., Rouan, D., Shimizu, T., Space Telescope Science Institute (US), University of Texas at San Antonio, Ministerio de Ciencia e Innovación (España), Air Force Office of Scientific Research (US), Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Agencia Nacional de Investigación y Desarrollo (Chile), Ministry of Education, Science and Technological Development (Serbia), Leist, M. T. [0000-0003-4975-2046], Packham, C. [0000-0001-7827-5758], Rosario, D.J.V. [0000-0002-0001-3587], Hope, D. A. [0000-0002-7957-7018], Alonso-Herrero, A. [0000-0001-6794-2519], Hicks, E.K.S. [0000-0002-4457-5733], #NODATA#, Zhang, L. [0000-0003-4937-9077], Davies, R. [0000-0003-4949-7217], Díaz-Santos, T. [0000-0003-0699-6083], González-Martín, O. [0000-0002-2356-8358], Bellocchi, E. [0000-0001-9791-4228], Boorman, P. G. [0000-0001-9379-4716], Combes, F. [0000-0003-2658-7893], García-Bernete, I. [0000-0002-9627-5281], García-Burillo, S. [0000-0003-0444-6897], García-Lorenzo, B. [0000-0002-7228-7173], Ichikawa, K. [0000-0002-4377-903X], Imanishi, M. [0000-0001-6186-8792], Jefferies, S. M. [0000-0002-9580-5615], García-Labiano, Francisco [0000-0002-0690-8824], Levenson, N. A. [0000-0003-4209-639X], Nikutta, R. [0000-0002-7052-6900], Pereira-Santaella, Miguel [0000-0002-4005-9619], Ramos Almeida, C. [0000-0001-8353-649X], Ricci, C. [0000-0001-5231-2645], Rigopoulou, D. [0000-0001-6854-7545], Schaefer, W. [0009-0008-9534-4661], Stalevski, M. [0000-0001-5146-8330], Fuller, L. [0000-0003-4809-6147], Izumi, T. [0000-0001-9452-0813], Shimizu, T. [0000-0002-2125-4670], Leist, M. T., Packham, C., Rosario, D. J.V., Hope, D. A., Alonso-Herrero, A., Hicks, E.K.S., Hönig, S., Zhang, L., Davies, R., Díaz-Santos, T., González-Martín, O., Bellocchi, E., Boorman, P. G., Combes, F., García-Bernete, I., García-Burillo, S., García-Lorenzo, B., Haidar, H., Ichikawa, K., Imanishi, M., Jefferies, S. M., García-Labiano, Francisco, Levenson, N. A., Nikutta, R., Pereira-Santaella, Miguel, Ramos Almeida, C., Ricci, C., Rigopoulou, D., Schaefer, W., Stalevski, M., Ward, M. J., Fuller, L., Izumi, T., Rouan, D., and Shimizu, T.

Abstract

The superb image quality, stability, and sensitivity of JWST permit deconvolution techniques to be pursued with a fidelity unavailable to ground-based observations. We present an assessment of several deconvolution approaches to improve image quality and mitigate the effects of the complex JWST point-spread function (PSF). The optimal deconvolution method is determined by using WebbPSF to simulate JWST’s complex PSF and MIRISim to simulate multiband JWST/Mid-Infrared Imager Module (MIRIM) observations of a toy model of an active galactic nucleus (AGN). Five different deconvolution algorithms are tested: (1) Kraken deconvolution, (2) Richardson–Lucy, (3) the adaptive imaging deconvolution algorithm, (4) sparse regularization with the Condat–Vũ algorithm, and (5) iterative Wiener filtering and thresholding. We find that Kraken affords the greatest FWHM reduction of the nuclear source of our MIRISim observations for the toy AGN model while retaining good photometric integrity across all simulated wave bands. Applying Kraken to Galactic Activity, Torus, and Outflow Survey (GATOS) multiband JWST/MIRIM observations of the Seyfert 2 galaxy NGC 5728, we find that the algorithm reduces the FWHM of the nuclear source by a factor of 1.6–2.2 across all five filters. Kraken images facilitate detection of extended nuclear emission ∼2 5 (∼470 pc, position angle; 115°) in the SE–NW direction, especially at the longest wavelengths. We demonstrate that Kraken is a powerful tool to enhance faint features otherwise hidden in the complex JWST PSF.

Published
2024

2. NUCLEAR STAR FORMATION ACTIVITY AND BLACK HOLE ACCRETION IN NEARBY SEYFERT GALAXIES.

Author

Esquej, P., Alonso-Herrero, A., González-Martín, O., Hönig, S. F., Hernán-Caballero, A., Roche, P., Almeida, C. Ramos, Mason, R. E., Díaz-Santos, T., Levenson, N. A., Aretxaga, I., Espinosa, J. M. Rodríguez, and Packham, C.

Subjects
STAR formation, ACCRETION (Astrophysics), BLACK holes, SEYFERT galaxies, STELLAR evolution, ASTROPHYSICAL fluid dynamics
Abstract

Recent theoretical and observational works indicate the presence of a correlation between the star-formation rate (SFR) and active galactic nucleus (AGN) luminosity (and, therefore, the black hole accretion rate, ) of Seyfert galaxies. This suggests a physical connection between the gas-forming stars on kpc scales and the gas on sub-pc scales that is feeding the black hole. We compiled the largest sample of Seyfert galaxies to date with high angular resolution (∼0.″4-0.″8) mid-infrared (8-13 μm) spectroscopy. The sample includes 29 Seyfert galaxies drawn from the AGN Revised Shapley-Ames catalog. At a median distance of 33 Mpc, our data allow us to probe nuclear regions on scales of ∼65 pc (median value). We found no general evidence of suppression of the 11.3 μm polycyclic aromatic hydrocarbon (PAH) emission in the vicinity of these AGN, and we used this feature as a proxy for the SFR. We detected the 11.3 μm PAH feature in the nuclear spectra of 45% of our sample. The derived nuclear SFRs are, on average, five times lower than those measured in circumnuclear regions of 600 pc in size (median value). However, the projected nuclear SFR densities (median value of 22 M☼ yr–1 kpc–2) are a factor of 20 higher than those measured on circumnuclear scales. This indicates that the SF activity per unit area in the central ∼65 pc region of Seyfert galaxies is much higher than at larger distances from their nuclei. We studied the connection between the nuclear SFR and and showed that numerical simulations reproduce our observed relation fairly well. [ABSTRACT FROM AUTHOR]

Published
2014
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