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Start Over Author "Sanchez, s" Journal monthly notices of the royal astronomical society
17 results on '"Sanchez, s"'

6. SDSS-IV MaNGA: galaxy gas-phase metallicity gradients vary across the mass–size plane.

Author

Boardman, N F, Zasowski, G, Newman, J A, Sanchez, S F, Schaefer, A, Lian, J, Bizyaev, D, and Drory, N

Subjects
GALAXIES, STELLAR mass, SPIRAL galaxies
Abstract

Gas-phase abundances and abundance gradients provide much information on past stellar generations, and are powerful probes of how galaxies evolve. Gas abundance gradients in galaxies have been studied as functions of galaxies' mass and size individually, but have largely not been considered across the galaxy mass–size plane. Thus, we investigate gas-phase abundance gradients across this plane, using a sample of over 1000 galaxies selected from the MApping Nearby Galaxies at APO (MaNGA) spectroscopic survey. We find that gradients vary systematically such that above 1010 M⊙, smaller galaxies display flatter gradients than larger galaxies at a given stellar mass. This mass–size behaviour cannot be explained by instrumental effects, nor is it simply a reflection of known trends between gradients and morphology. We explore multiple possibilities for a physical origin for this pattern, though further work is needed to establish a firm physical interpretation. [ABSTRACT FROM AUTHOR]

Published
2021
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7. The EDGE–CALIFA survey: the influence of galactic rotation on the molecular depletion time across the Hubble sequence

Author

Colombo, D, primary, Kalinova, V, additional, Utomo, D, additional, Rosolowsky, E, additional, Bolatto, A D, additional, Levy, R C, additional, Wong, T, additional, Sanchez, S F, additional, Leroy, A K, additional, Ostriker, E, additional, Blitz, L, additional, Vogel, S, additional, Mast, D, additional, García-Benito, R, additional, Husemann, B, additional, Dannerbauer, H, additional, Ellmeier, L, additional, and Cao, Y, additional

Published
2017
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8. The EDGE-CALIFA survey: the influence of galactic rotation on the molecular depletion time across the Hubble sequence.

Author

Colombo, D., Kalinova, V., Utomo, D., Rosolowsky, E., Bolatto, A. D., Levy, R. C., Wong, T., Sanchez, S. F., Leroy, A. K., Ostriker, E., Blitz, L., Vogel, S., Mast, D., García-Benito, R., Husemann, B., Dannerbauer, H., Ellmeier, L., and Cao, Y.

Subjects
GALACTIC dynamics, ROTATIONAL motion, DEPLETION layers (Electronics), HUBBLE constant, STAR formation
Abstract

We present a kpc-scale analysis of the relationship between the molecular depletion time (τ mol dep ) and the orbital time (τ orb) across the field of 39 face-on local galaxies, selected from the EDGE-CALIFA sample. We find that, on average, 5 per cent of the available molecular gas is converted into stars per orbital time, or τ mol dep ~ 20 τorb. The resolved relation shows a scatter of ~0.5 dex. The scatter is ascribable to galaxies of different morphologies that follow different τ mol dep -τ orb relations which decrease in steepness from early- to late types. The morphologies appear to be linked with the star formation rate surface density, the molecular depletion time, and the orbital time, but they do not correlate with the molecular gas content of the galaxies in our sample.We speculate that in our molecular gas rich, early-type galaxies, the morphological quenching (in particular the disc stabilization via shear), rather than the absence of molecular gas, is the main factor responsible for their current inefficient star formation. [ABSTRACT FROM AUTHOR]

Published
2018
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9. Gemini 3D spectroscopy of BAL+IR+Fe ii QSOs - II. IRAS 04505−2958, an explosive QSO with hypershells and a new scenario for galaxy formation and galaxy end phase

Author

Lípari, S., primary, Bergmann, M., additional, Sanchez, S. F., additional, Garcia-Lorenzo, B., additional, Terlevich, R., additional, Mediavilla, E., additional, Taniguchi, Y., additional, Zheng, W., additional, Punsly, B., additional, Ahumada, A., additional, and Merlo, D., additional

Published
2009
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10. GEMINI 3D spectroscopy of BAL + IR + Fe ii QSOs - I. Decoupling the BAL, QSO, starburst, NLR, supergiant bubbles and galactic wind in Mrk 231

Author

Lipari, S., primary, Sanchez, S. F., additional, Bergmann, M., additional, Terlevich, R., additional, Garcia-Lorenzo, B., additional, Punsly, B., additional, Mediavilla, E., additional, Taniguchi, Y., additional, Ajiki, M., additional, Zheng, W., additional, Acosta, J., additional, and Jahnke, K., additional

Published
2009
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13. Cosmological weak lensing with the HST GEMS survey

Author

Heymans, C., primary, Brown, M. L., additional, Barden, M., additional, Caldwell, J. A. R., additional, Jahnke, K., additional, Peng, C. Y., additional, Rix, H.-W., additional, Taylor, A., additional, Beckwith, S. V. W., additional, Bell, E. F., additional, Borch, A., additional, Haussler, B., additional, Jogee, S., additional, McIntosh, D. H., additional, Meisenheimer, K., additional, Sanchez, S. F., additional, Somerville, R., additional, Wisotzki, L., additional, and Wolf, C., additional

Published
2005
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15. Can Jupiters be found by monitoring Galactic bulge microlensing events from northern sites?

Author

Tsapras, Y., primary, Street, R. A., additional, Horne, K., additional, Penny, A., additional, Clarke, F., additional, Deeg, H., additional, Garzon, F., additional, Kemp, S., additional, Osorio, M. R. Z., additional, Abad, A. O., additional, Sanchez, S. M., additional, Eiroa, C., additional, Mora, A., additional, Alberdi, A., additional, Cameron, A., additional, Davies, J. K., additional, Ferlet, R., additional, Grady, C., additional, Harris, A. W., additional, Palacios, J., additional, Quirrenbach, A., additional, Rauer, H., additional, Schneider, J., additional, de Winter, D., additional, Merin, B., additional, and Solano, E., additional

Published
2001
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17. Red quasars not so dusty

Author

Benn, C. R., primary, Vigotti, M., additional, Carballo, R., additional, Gonzalez-Serrano, J. I., additional, and Sanchez, S. F., additional

Published
1998
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