Results 31 to 40 of about 205,088 (284)

The Chemodynamics of the Stellar Populations in M31 from APOGEE Integrated-light Spectroscopy

The Astrophysical Journal, 2023
We present an analysis of nearly 1000 near-infrared, integrated-light spectra from APOGEE in the inner ∼7 kpc of M31. We utilize full-spectrum fitting with A-LIST simple stellar population spectral templates that represent a population of stars with the ...
Benjamin J. Gibson, Gail Zasowski, Anil Seth, Aishwarya Ashok, Kameron Goold, Tobin Wainer, Sten Hasselquist, Jon Holtzman, Julie Imig, Dmitry Bizyaev, Steven R. Majewski   +10 more
doaj   +1 more source

Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. IV. High-precision Constraints on the Evolution of the Stellar–Halo Mass Relation at Redshift z < 0.7

The Astrophysical Journal, 2023
Taking advantage of the Photometric objects Around Cosmic webs method developed in Paper I, we measure the excess surface density ${\bar{n}}_{2}{w}_{{\rm{p}}}$ of the photometric objects around spectroscopic objects down to stellar masses 10 ^8.0 M _ ...
Kun Xu, Y. P. Jing, Yun Zheng, Hongyu Gao   +3 more
doaj   +1 more source

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   +6 more sources

Chemical Abundances in our Galaxy and Other Galaxies Derived from H II Regions [PDF]

Astrophys.Space Sci. 277 (2001) 147-156, 2000
We discuss the accuracy of the abundance determinations of H II regions in our Galaxy and other galaxies. We focus on the main observational constraints derived from abundance determinations that have implications for models of galactic chemical evolution: a) the helium to hydrogen abundance ratio, He/H; b) the oxygen to hydrogen abundance ratio, O/H ...
arxiv   +1 more source

Galactic Abundances: Report of Working Group 3 [PDF]

, 2001
We summarize the various methods and their limitations and strengths to derive galactic abundances from in-situ and remote-sensing measurements, both from ground-based observations and from instruments in space. Because galactic abundances evolve in time
Bothmer, V., Buclin, F., Christian, E. R., Cummings, A. C., Flückiger, E. O., George, J. S., Hofer, M. Y., Jones, F. C., Keller, J. W., Kirilova, D., Klecker, B., Kunow, H., Laming, M., Salerno, E., Sofia, U. J., Stone, E. C., Thielemann, F.-K., Tranquille, C., Wenzel, K.-P., Wiedenbeck, M. E.   +19 more
core   +1 more source

Connecting the primordial and Galactic deuterium abundances [PDF]

, 2007
The deuterium abundances inferred from observations of the interstellar medium within 1-2 kpc of the Sun range over a factor of three and the corresponding oxygen abundances show an even larger dispersion.
Romano, Donatella, Steigman, Gary, Tosi, Monica   +2 more
core   +3 more sources

Evolution of chemical abundances in Seyfert galaxies [PDF]

Astronomy & Astrophysics, 2007
17 pages, 15 figures, 3 tables, accepted for publication in A& ...
Francesco Calura, S. K. Ballero, S. K. Ballero, Francesca Matteucci, Francesca Matteucci, Paolo Padovani, Luca Ciotti   +6 more
openaire   +6 more sources

Simulations of the galaxy population constrained by observations from z=3 to the present day: implications for galactic winds and the fate of their ejecta [PDF]

, 2012
We apply Monte Carlo Markov Chain (MCMC) methods to large-scale simulations of galaxy formation in a LambdaCDM cosmology in order to explore how star formation and feedback are constrained by the observed luminosity and stellar mass functions of galaxies.
Angulo, Baldry, Baldry, Behroozi, Bell, Benson, Benson, Bertone, Bigiel, Bower, Bower, Bower, Boylan-Kolchin, Bruno M. B. Henriques, Bruzual, Caputi, Chabrier, Cirasuolo, Cole, Cole, Cole, Conroy, Conroy, Croton, De Lucia, De Lucia, De Lucia, De Lucia, Domínguez Sánchez, Drory, Fontana, Fontanot, Fontanot, Frenk, Fu, Gallazzi, Gerard Lemson, Giallongo, Guo, Guo, Guo, Guo, Guo, Haas, Hastings, Hatton, Helly, Henriques, Henriques, Henriques, Henriques, Henriques, Ilbert, Ilbert, Jones, Kampakoglou, Kang, Kauffmann, Kauffmann, Kauffmann, Kauffmann, Kauffmann, Kennicutt, Kitzbichler, Lacey, Li, Lu, Lu, Lu, Maraston, Marchesini, Marchesini, Marchesini, Metropolis, Moster, Moster, Mutch, Neistein, Norberg, Oppenheimer, Oppenheimer, Peter A. Thomas, Poli, Pozzetti, Pozzetti, Press, Pérez-González, Qi Guo, Raul E. Angulo, Reddick, Roukema, Salim, Salimbeni, Saracco, Simon D. M. White, Somerville, Somerville, Somerville, Springel, Springel, Tonini, Vale, Volker Springel, Wang, Weinmann, Weinmann, Weinmann, White, White, Willmer, Zucca   +110 more
core   +2 more sources

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.
Priyamvada Natarajan, Volker Springel
openaire   +3 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   +5 more sources