Results 51 to 60 of about 52,268 (222)

KiDS-1000: Combined halo-model cosmology constraints from galaxy abundance, galaxy clustering, and galaxy-galaxy lensing

Astronomy & Astrophysics, 2023
We present constraints on the flat Λ cold dark matter cosmological model through a joint analysis of galaxy abundance, galaxy clustering, and galaxy-galaxy lensing observables with the Kilo-Degree Survey. Our theoretical model combines a flexible conditional stellar mass function, which describes the galaxy-halo connection, with a cosmological N-body ...
Andrej Dvornik, Catherine Heymans, Marika Asgari, Constance Mahony, Benjamin Joachimi, Maciej Bilicki, Elisa Chisari, Hendrik Hildebrandt, Henk Hoekstra, Harry Johnston, Konrad Kuijken, Alexander Mead, Hironao Miyatake, Takahiro Nishimichi, Robert Reischke, Sandra Unruh, Angus H. Wright   +16 more
openaire   +7 more sources

Oxygen abundance distributions in six late-type galaxies based on SALT spectra of HII regions

, 2015
Spectra of 34 H II regions in the late-type galaxies NGC1087, NGC2967, NGC3023, NGC4030, NGC4123, and NGC4517A were observed with the South African Large Telescope (SALT). In all 34 H II regions, oxygen abundances were determined through the "counterpart"
Grebel, E. K., Kniazev, A. Y., Pilyugin, L. S., Zinchenko, I. A.   +3 more
core   +1 more source

Arbuscular mycorrhizal fungal community abundance, functions, and symbiotic interactions revealed by root metatranscriptomes

iMetaOmics, EarlyView.
Paradigm shift: PCR‐free methods reveal 6–15‐fold higher arbuscular mycorrhizal (AM) fungal abundance than metabarcoding, exposing systematic underestimation across decades of research. Predictive power: AM fungal abundance serves as a community‐level trait that predicts crop yield under drought conditions.
Peilin Chen, John W. Taylor, Cheng Gao
wiley   +1 more source

The Hubble Constant Anchor Galaxy NGC 4258: Metallicity and Distance from Blue Supergiants

The Astrophysical Journal
A quantitative spectroscopic study of blue supergiant stars in the Hubble constant anchor galaxy NGC 4258 is presented. The non-LTE analysis of Keck I telescope LRIS spectra yields a central logarithmic metallicity (in units of the solar value) of [ Z ] =
Rolf-Peter Kudritzki, Miguel A. Urbaneja, Fabio Bresolin, Lucas M. Macri, Wenlong Yuan, Siyang Li, Gagandeep S. Anand, Adam G. Riess   +7 more
doaj   +1 more source

Gas Emission Spectrum in the Irr Galaxy IC 10

, 2009
Spectroscopic long-slit observations of the dwarf Irr galaxy IC 10 were conducted at the 6-m Special Astrophysical Observatory telescope with the SCORPIO focal reducer.
A. Bullejos, A. Gil de Paz, A. Leroy, A. M. Hidalgo-Gamez, A. V. Moiseev, B. E. J. Pagel, C. J. Ramsey, D. A. Hunter, D. B. Zucker, D. B. Zucker, D. R. Garnett, D. V. Bizyaev, E. M. Wilcots, H. Lee, H. Yang, J. Borissova, J. C. Thurow, J. Lequeux, K. T. Chyzy, L. H. Aller, L.S. Pilyuginand, M. A. Dopita, M. A. Dopita, M. A. Dopita, M. G. Allen, M. G. Richer, M. Rosado, N. V. Asari, O. V. Egorov, P. A. Crowther, P. Hodge, P. Massey, P. Massey, P. Massey, P. Royer, R. C. Fernandes, S. Charlot, S. Demers, S. Sakai, T. A. Lozinskaya, T. A. Lozinskaya, T.A. Lozinskaya, V. C. Galarza, V. L. Afanasiev, W. D. Vacca, Y. I. Izotov   +45 more
core   +1 more source

Molecular tracers of PDR-dominated galaxies [PDF]

, 2009
Photon-dominated regions (PDRs) are powerful molecular line emitters in external galaxies. They are expected in galaxies with high rates of massive star formation due to either starburst (SB) events or starburst coupled with active galactic nuclei (AGN ...
Bayet, Bayet, Chieffi, D. A. Williams, E. Bayet, Evans, Gao, García-Burillo, Gerin, Graciá-Carpio, Habing, Heger, Imanishi, Israel, J. M. C. Rawlings, Knauth, Knudsen, Kohno, Kohno, Krips, Krips, Lintott, Martín, Martín, Meyer, Origlia, Papadopoulos, Riechers, S. Viti, Sakamoto, Snow, Sofia, Solomon, Sosa-Brito, T. Bell, Umeda, Wagg, Wu   +37 more
core   +2 more sources

Ginseng polysaccharides prevent mastitis through Lactobacillus murinus‐derived deoxycholic acid and TGR5 signaling

iMetaOmics, EarlyView.
Prebiotic Ginseng polysaccharides (GP) alleviate mastitis through selective enrichment of gut L. murinus, which elevates its anti‐inflammatory metabolite deoxycholic acid (DCA). Circulating DCA engages mammary epithelial TGR5 receptors, triggering the cAMP–PKA pathway to suppress NF‐κB/NLRP3‐mediated inflammation.
Zhijie Zheng, Huiying Liu, Sizhe Chen, Jianhui Gu, Sisi Cai, Xiang Liu, Raphaela I. Lau, Yao Zhang, Sunjae Lee, Xiaoyan Wang, Kewei Fan, Xiaole Yin, Hein Min Tun, Renyou Gan, Haichong Wu, Qi Su   +15 more
wiley   +1 more source

Subsystems of the Galactic halo, their structures and compositions

Odessa Astronomical Publications, 2017
It is shown that general populations of globular clusters and metal-poor field stars are components at least of three subsystems occupying different volumes in the Galaxy.
V. A. Marsakov, T. V. Borkova
doaj   +1 more source

Chemical Abundances of Planetary Nebulae in M33

, 2004
Using spectroscopic data presented in Magrini et al. (2003), we have analyzed with the photoionization code CLOUDY 94.00 (Ferland et al. 1998) 11 Planetary Nebulae belonging to the spiral galaxy M 33. Central star temperatures and nebular parameters have
A. Mampaso, Ambartsumian, Armsdorfer, Che, Corradi, Costa, Dufour, Exter, Ferland, Gurzadyan, Henry, Howard, Iben, Jacoby, Jacoby, Jacoby, Kingsburgh, L. Magrini, Leisy, M. Perinotto, Magrini, Mampaso, Maran, Morisset, Peimbert, Perinotto, Phillips, R. L. M. Corradi, Rauch, Richer, Stasinska, Vílchez, Walsh, Walsh   +33 more
core   +1 more source

Massive star formation in Wolf-Rayet galaxies: II. Optical spectroscopy results [PDF]

, 2009
(Abridged) We have performed a comprehensive multiwavelength analysis of a sample of 20 starburst galaxies that show the presence of a substantial population of very young massive stars.
A. R. López-Sánchez, Barnes, Benjamin, Bettoni, Brinchmann, Buckalew, C. Esteban, Campbell, Cannon, Conti, Conti, Crowther, Dahlem, Davoust, Denicoló, Dopita, Erb, Esteban, Fernandes, Fioc, Foltz, French, Gallego, García-Rojas, Garnett, Garnett, Gordon, Guseva, Guseva, Guseva, Hirashita, Huang, Huchtmeier, Huchtmeier, Huchtmeier, Hunter, Izotov, Izotov, Izotov, Izotov, Izotov, Kauffmann, Kewley, Kobulnicky, Kobulnicky, Kobulnicky, Kong, Kunth, Kunth, Lee, Leitherer, López-Sánchez, López-Sánchez, López-Sánchez, López-Sánchez, López-Sánchez, Maeder, Maeder, Masegosa, Masegosa, Massey, Mazzarella, Mazzarrella, Melbourne, Melbourne, Meynet, Méndez, Méndez, Paturel, Peimbert, Penston, Perryman, Pettini, Peña, Pilyugin, Pilyugin, Pindao, Pindao, Piovan, Pramsku, Pustilnik, Pustilnik, Pérez-Montero, Quinet, Richer, Rodríguez, Salzer, Sargent, Schaerer, Schaerer, Schlegel, Shaw, Shi, Skillman, Smith, Springel, Stasinska, Storey, Terlevich, Thuan, Thuan, Thuan, Vacca, Vaceli, van Zee, Veilleux, Vázquez, Weaver, Westera, Winkler, Woosley, Zasov, Zhang, Zhang   +113 more
core   +2 more sources