Results 11 to 20 of about 271,788 (231)

Dust Formation in a Galaxy with Primitive Abundances [PDF]

Science, 2009
Interstellar dust plays a crucial role in the evolution of galaxies. It governs the chemistry and physics of the interstellar medium. In the local universe, dust forms primarily in the ejecta from stars, but its composition and origin in galaxies at very early times remain controversial.
Sloan, G C, Matsuura, M., Zijlstra, Albert A, Lagadec, Eric, Groenewegen, M A T, Wood, Peter R, Szyszka, C, Bernard-Salas, J, van Loon, Jacco Th   +8 more
openaire   +5 more sources

Chemical abundances in active galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT The Sloan Digital Sky Survey (SDSS) has proved to be a powerful resource for understanding the physical properties and chemical composition of star-forming galaxies in the local Universe. The SDSS population of active galactic nuclei (AGNs) remains as of yet less explored in this capacity.
Flury, Sophia R., Moran, Edward C.
openaire   +2 more sources

Abundance of field galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
15 pages, 13 figures.
Klypin, Anatoly, Karachentsev, Igor, Makarov, Dmitry, Nasonova, Olga   +3 more
openaire   +2 more sources

Dark Energy Survey Year 1 results : cosmological constraints from cluster abundances, weak lensing, and galaxy correlations [PDF]

, 2021
We present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness.
To, Chun-Hao, DES Collaboration, Santiago, Basilio Xavier   +2 more
core   +2 more sources

The evolution of the oxygen abundance in the Galaxy [PDF]

New Astronomy Reviews, 2001
AbstractWe discuss the evolution of the [O/Fe] as a function of [Fe/H] in the Galaxy. In particular, we discuss the influence of different stellar yields as well as different SN (II, I) rates on the [O/Fe] ratio. Possible explanations for the steep rise of the [O/Fe] ratio at low metallicities, as indicated by recent observations, are critically ...
MATTEUCCI, MARIA FRANCESCA, CHIAPPINI C.
openaire   +3 more sources

Chemical abundances in Seyfert galaxies – VIII. Argon abundance estimates [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT For the first time, the argon abundance relative to hydrogen abundance (Ar/H) in the narrow line region of a sample of Seyfert 2 nuclei has been derived. In view of this, optical narrow emission line intensities of a sample of 64 local Seyfert 2 nuclei (z < 0.25) taken from Sloan Digital Sky Survey DR7 and measured by ...
A F Monteiro, O L Dors
openaire   +4 more sources

Abundance ratios in dwarf elliptical galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range -19.0 < Mr < -16.0. We analyze their absorption line-strength indices by means of index-index diagrams and scaling relations and use the stellar population ...
Şen, Ş., Peletier, R. F., Boselli, A., den Brok, M., Falcón-Barroso, J., Hensler, G., Janz, J., Laurikainen, E., Lisker, T., Mentz, J. J., Paudel, S., Salo, H., Sybilska, A., Toloba, E., van de Ven, G., Vazdekis, A., Yesilyaprak, C.   +16 more
openaire   +9 more sources

Abundance Ratios in Dwarf Elliptical Galaxies [PDF]

Proceedings of the International Astronomical Union, 2016
AbstractThe aim of this study is to determine abundance ratios and star formation histories (SFH) of dwarf ellipticals in the nearby Virgo cluster. We perform a stellar population analysis of 39 dEs and study them using index-index and scaling relations. We find an unusual behaviour where [Na/Fe] is under-abundant w.r.t.
Sen, Seyda, Peletier, Reynier F., Toloba, Elisa, Mentz, Jaco J.   +3 more
openaire   +4 more sources

The abundance and radial distribution of satellite galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
Using detailed mock galaxy redshift surveys (MGRSs) we investigate the abundance and radial distribution of satellite galaxies. The mock surveys are constructed using the conditional luminosity function (CLF), and are compared against data from the 2dFGRS.
van den Bosch, FC, Yang, XH, Mo, HJ, Norberg, P   +3 more
openaire   +4 more sources

Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Correlations [PDF]

, 2020
International audienceWe present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness.
Diehl, H. T., Sánchez, C., Rykoff, E.S., Prat, J., Bertin, E., Sheldon, E., Burke, D.L., Avila, S., Burke, D., Rozo, E., Serrano, S., Zuntz, Joseph, J., Elvin-Poole, Hinton, S. R., Evrard, A.E., Morgan, R., Huterer, D., Wechsler, R.H., Hartley, W. G., Pereira, M.E.S., H Wu (7724324), Troxel, M.A., Romer, A. K., Kron, R., Bernstein, G.M., Troxel, M. A., Swanson, M., Hartley, W.G., Brooks, D., Gatti, M., Crocce, M., Ferrero, I., Pereira, Maria Elidaiana da Silva, Bridle, S., Tucker, D.L., Abbott, T., To, C., Marshall, J. L., Swanson, M. E. C., Ferrero, I, Annis, J., Park, Y., James, D. J., Plazas, A.A., Gaztanaga, E., Evrard, A. E., Tucker, D. L., Sevilla-Noarbe, I, Gruendl, Robert A., Thomas, D., Abbott, T. M. C., Maia, M.A.G., Myles, J., García-Bellido, Juan, Plazas, A., Evrard, A., Friedrich, O., Desai, Shantanu et. al., Myles, Justin, E Rozo (16233077), Pereira, M. E. S., Menanteau, F., T F Eifler (16231247), Plazas, A. A., da Costa, L., Jarvis, M., Maccrann, N., Evrard, August E., Choi, A., Davis, T. M., Ross, A.J., Fosalba, P., Gruen, D., Gaztañaga, Enrique, Becker, M.R., Drlica-Wagner, A., Kuropatkin, N., Rosell, A., Miquel, R., Burke, D. L., Varga, T.N., Rykoff, E. S., J Blazek (12492481), Huterer, Dragan, Weller, Jochen, Tarle, G., Abbott, T.M.C., Bridle, S.L., Elvin-Poole, J., Wester, W., da Costa, L.N., others (6644544), Wilkinson, R., Ross, A. J., da Costa, L. N., Ross, Ashley J., Everett, S., Scarpine, V, Carnero Rosell, A., Marshall, J., Vielzeuf, P., Dietrich, J. P., E S Rykoff (16231346), Dietrich, J.P., MacCrann, Niall, James, D., Wechsler, R., Dietrich, J., D Gruen (7793453), Hoyle, B., Becker, M. R., Diehl, H.T., Swanson, M.E.C., Paz-Chinchón, Francisco, Zuntz, J., Hollowood, Devon L., Porredon, A., Aguena, M., Weller, J., Hollowood, D. L., Santiago, B., Blazek, J., Costanzi, M., Zhang, Y., Hartley, W., Hinton, Samuel R., G M Bernstein (16038710), Farahi, A., Davis, T.M., Romer, A., Rykoff, E., Kind, M., Rau, M. M., Gruendl, R., García-Bellido, J., Miranda, V., Becker, M., Porredon, Anna, Samuroff, S., Palmese, A., Bernstein, G., Kathy Romer (4460893), Bocquet, S., Hinton, S., Rau, M., Varga, T. N., Marshall, J.L., Giannantonio, T., Frieman, J., Eifler, T.F., Bridle, S. L., Sunayana Bhargava (4466935), Wilkinson, R. D., M Costanzi (13470256), Gutierrez, G., Maia, M., Gruen, Daniel, Carretero, J., Giannantonio, Tommaso, Wechsler, Risa H., Fang, X., Rykoff, Eli S., Chang, C., Diehl, H., Krause, E., Troxel, M., Smith, M., Pereira, M., DES Collaboration, Serrano, Santiago, Varga, T., M R Becker (16233032), Eifler, T., Muir, J., Bridle, Sarah L., Derose, J., Sevilla-Noarbe, I., Flaugher, B., Gruendl, R.A., Tucker, D., Paz-Chinchón, F., Davis, T., Conselice, C., Cawthon, R., Suchyta, E., R H Wechsler (16219145), Carrasco Kind, Matias, Hollowood, D.L., Wechsler, R. H., Davis, C., S Bocquet (16038758), Desai, S., Wu, H., Mcclintock, T., C To (14029857), E Krause (7746401), Romer, A.K., Hinton, S.R., Sanchez, E., To, Chun-Hao, Jeltema, T., Scarpine, V., Ferrero, Ismael, Fosalba, Pablo, DES Collaboration (16038677), Carrasco Kind, M., Roodman, A., Miranda, V, Rau, M.M., Eifler, T. F., Bhargava, S., Gruendl, R. A., Lima, M., Bernstein, G. M., Ross, A., Wilkinson, Reese D., Plazas, Andrés A., Honscheid, K., James, D.J., Amon, A., Maia, M. A. G., Hollowood, D., Kuehn, K., Crocce, Martín, García-Bellido Capdevila, Juan, Ávila Pérez, Santiago Javier, Lima, Marcos Vinicius Borges Teixeira, B. Hoyle, D. L. Hollowood, J. Zuntz, R. Cawthon, E. Gaztanaga, K. Kuehn, B. Santiago, W. G. Hartley, E. S. Rykoff, A. Drlica-Wagner, J. Elvin-Poole, Y. Park, N. Kuropatkin, G. Gutierrez, F. Menanteau, S. Serrano, null null, C. Sánchez, A. E. Evrard, R. H. Wechsler, M. Costanzi, S. Samuroff, D. Gruen, S. L. Bridle, M. Jarvis, E. Suchyta, T. Jeltema, H. Wu, J. Annis, M. A. G. Maia, R. Miquel, I. Sevilla-Noarbe, Y. Zhang, D. J. James, M. E. S. Pereira, J. García-Bellido, M. Lima, H. T. Diehl, S. Desai, J. Muir, A. Roodman, T. M. C. Abbott, I. Ferrero, D. Brooks, M. E. C. Swanson, A. A. Plazas, R. A. Gruendl, R. Morgan, S. Avila, J. DeRose, B. Flaugher, T. Giannantonio, T. F. Eifler, V. Miranda, C. Chang, W. Wester, M. Carrasco Kind, C. Conselice, M. M. Rau, R. Kron, M. R. Becker, M. A. Troxel, E. Krause, G. M. Bernstein, J. L. Marshall, G. Tarle, D. Huterer, A. Carnero Rosell, S. Bocquet, D. L. Tucker, D. Thomas, J. Blazek, T. McClintock, E. Sheldon, J. Myles, C. To, E. Bertin, P. Fosalba, X. Fang, M. Crocce, A. Palmese, K. Honscheid, J. Carretero, J. Frieman, P. Vielzeuf, D. L. Burke, A. Choi, O. Friedrich, V. Scarpine, L. N. da Costa, A. Amon, A. Porredon, T. N. Varga, J. P. Dietrich, N. MacCrann, S. Bhargava, C. Davis, M. Gatti, A. Farahi, J. Prat, E. Sanchez, M. Aguena, J. Weller, S. Everett, A. J. Ross, S. R. Hinton, T. M. Davis, R. D. Wilkinson, A. K. Romer, F. Paz-Chinchón, M. Smith, E. Rozo   +338 more
core   +1 more source