Results 31 to 40 of about 261,878 (239)

Abundance of Substructure in Clusters of Galaxies

The Astrophysical Journal, 2004
It is widely recognized that cold dark matter models predict abundant dark matter substructure in halos of all sizes. Galaxy-galaxy lensing provides a unique opportunity to directly measure the presence and the mass of such substructures in clusters of galaxies.
Natarajan, P., Springel, V.
openaire   +3 more sources

Galaxy Populations in Groups and Clusters: Evidence for a Characteristic Stellar Mass Scale at M ∗ ∼ 109.5 M ⊙

The Astrophysical Journal, 2023
We use the DR9 of the DESI legacy imaging survey and SDSS galaxy groups to measure the conditional luminosity function (CLF) for groups with halo mass M _h ≥ 10 ^12 M _⊙ and redshift 0.01 ≤ z ≤ 0.08, down to a limiting r -band magnitude of M _r = −10 to −
Jiacheng Meng, Cheng Li, H. J. Mo, Yangyao Chen, Zhen Jiang, Lizhi Xie   +5 more
doaj   +1 more source

ON THE SURVIVAL AND ABUNDANCE OF DISK-DOMINATED GALAXIES [PDF]

The Astrophysical Journal, 2009
We study the formation of disk-dominated galaxies in a Lambda CDM universe. Their existence is considered to be a challenge for the Lambda CDM cosmology, because galaxy mergers isotropize stellar disks and trigger angular momentum transport in gas disks, thus fostering the formation of central stellar spheroids. Here, we postulate that the formation of
Koda, Jun, Milosavljevic, Milos, Shapiro, Paul R.   +2 more
openaire   +4 more sources

On the oxygen abundance deficiency in irregular galaxies [PDF]

New Astronomy Reviews, 2000
8 pages, 7 figures, accepted for publication in Astronomy and ...
Pilyugin, L. S., Ferrini, F.
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Galaxy And Mass Assembly (GAMA) : galaxy close pairs, mergers and the future fate of stellar mass [PDF]

, 2014
ASGR acknowledges STFC and SUPA funding that were used to do this work. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO and the participating institutions.We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift
De Propris, R., De Propis, R., T McNaught-Roberts (16161611), Pimbblet, K. A., A Moffett (7731959), Driver, S. P., M S Owers (16161563), Lara-Lopez, M. A., A M Hopkins (16143587), Lopez-Sanchez, Angel R., B W Holwerda (16219943), Jonathan Loveday (4460899), Owers, M. S., R De Propris (16161587), Obreschkow, D., Holwerda, Benne W., M Cluver (16191152), Baldry, I. K., J Bland-Hawthorn (16111139), Davies, L. J. M., Bauer, A. E., E N Taylor (16143620), Brown, M. J. I., A S G Robotham (16143614), M A Lara-Lopez (16161575), A E Bauer (16161566), Hopkins, A. M., E van Kampen (16112642), Brough, S., Loveday, J., McNaught-Roberts, T., I K Baldry (16072595), Moffett, A., Liske, J., Wilkins, S. M., P Norberg (16143575), Holwerda, B. W., Mahajan, S., L S Kelvin (16143602), K Pimbblet (16191149), Penny, S. J., Robotham, A. S. G., van Kampen, E., M Prescott (10000280), M J Drinkwater (16091732), Bland-Hawthorn, J., N K Agius (16219940), Agius, N. K., Prescott, M., M J I Brown (16143632), Cluver, M., Drinkwater, M. J., S J Penny (16219955), Taylor, E. N., Stephen Wilkins (4461910), Lopez-Sanchez, A. R., D Obreschkow (16219952), S Brough (16143590), S Mahajan (16219949), L J M Davies (16219937), Norberg, P., J Liske (7814738), Kelvin, L. S., Pimbblet, K., S P Driver (16143581), A R López-Sánchez (16219946)   +65 more
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Search for Extremely Metal-poor Stars with Gemini-N/Graces. I. Chemical-abundance Analysis

The Astrophysical Journal, 2023
We present stellar parameters and abundances of 13 elements for 18 very metal-poor (VMP; [Fe/H] < –2.0) stars, selected as extremely metal-poor (EMP; [Fe/H] < –3.0) candidates from the Sloan Digital Sky Survey and Large sky Area Multi-Object Fiber ...
Miji Jeong, Young Sun Lee, Timothy C. Beers, Vinicius M. Placco, Young Kwang Kim, Jae-Rim Koo, Ho-Gyu Lee, Soung-Chul Yang   +7 more
doaj   +1 more source

Intermediate‐Element Abundances in Galaxy Clusters [PDF]

The Astrophysical Journal, 2005
We present the average abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA. We determine the abundances of Fe, Si, S, and Ni as a function of cluster temperature (mass) from 1--10 keV, and place strong upper limits on the abundances of Ca and Ar.
Mushotzky, R., Horner, D., Loewenstein, M., Baumgartner, W., Mushotzky, R., Horner, D., Loewenstein, M., Baumgartner, W.   +7 more
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Stellar Abundances in Local Group Galaxies [PDF]

Highlights of Astronomy, 2005
AbstractHere we describe some of our latest results from measuring detailed abundances in Local Group dwarf galaxies with the VLT. Combining spectroscopic abundances with Color-Magnitude diagrams allows the effective measurement of detailed chemical evolution with time in these galaxies.
Tolstoy, Eline, Venn, Kim
openaire   +2 more sources

CHEMICAL ABUNDANCES IN CLUSTERS OF GALAXIES

, 1995
25 pages of uuencoded compressed PostScript. 4 PostScript figures and 4 PostScript tables available from http://www-astro.physics.ox.ac.uk/~bkg/gibson.html Accepted for publication in Astronomy & Astrophysics.
MATTEUCCI, MARIA FRANCESCA, Gibson, B. K.   +1 more
openaire   +3 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   +223 more
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