Results 11 to 20 of about 6,945 (227)

Cosmology with Galaxy Photometry Alone [PDF]

Astrophysical Journal Letters, 2023
We present the first cosmological constraints using only the observed photometry of galaxies. Villaescusa-Navarro et al. recently demonstrated that the internal physical properties of a single simulated galaxy contain a significant amount of cosmological
ChangHoon Hahn, Francisco Villaescusa-Navarro, Peter Melchior, Romain Teyssier   +3 more
exaly   +5 more sources

Galaxy surface photometry [PDF]

Open Astronomy, 1999
We describe galaxy surface photometry based on fitting ellipses to the isophotes of the galaxies. Example galaxies with different isophotal shapes are used to illustrate the process, including how the deviations from elliptical isophotes are quantified using Fourier expansions.
Milvang-Jensen Bo, Jørgensen Inger
doaj   +3 more sources

PopSED: Population-level Inference for Galaxy Properties from Broadband Photometry with Neural Density Estimation [PDF]

The Astronomical Journal, 2023
We present PopSED , a framework for the population-level inference of galaxy properties from photometric data. Unlike the traditional approach of first analyzing individual galaxies and then combining the results to determine the physical properties of ...
Jiaxuan Li, Peter Melchior, ChangHoon Hahn, Song Huang   +3 more
doaj   +3 more sources

The DESI PRObabilistic Value-added Bright Galaxy Survey (PROVABGS) Mock Challenge

The Astrophysical Journal, 2023
The PRObabilistic Value-added Bright Galaxy Survey (PROVABGS) catalog will provide measurements of galaxy properties, such as stellar mass ( M _* ), star formation rate (SFR), stellar metallicity ( Z ), and stellar age ( t _age ), for >10 million ...
ChangHoon Hahn, K. J. Kwon, Rita Tojeiro, Malgorzata Siudek, Rebecca E. A. Canning, Mar Mezcua, Jeremy L. Tinker, David Brooks, Peter Doel, Kevin Fanning, Enrique Gaztañaga, Robert Kehoe, Martin Landriau, Aaron Meisner, John Moustakas, Claire Poppett, Gregory Tarle, Benjamin Weiner, Hu Zou   +18 more
doaj   +1 more source

Improved GALEX UV Photometry for 700,000 SDSS Galaxies

The Astrophysical Journal Supplement Series, 2023
The Galaxy Evolution Explorer (GALEX) satellite performed the first and only large-area UV survey, which in tandem with the Sloan Digital Sky Survey (SDSS) has facilitated modeling of the spectral energy distributions of low-redshift galaxies and the ...
Chandler Osborne, Samir Salim, Médéric Boquien, Mark Dickinson, Stéphane Arnouts   +4 more
doaj   +1 more source

Surface Photometry of Nearby Field Galaxies: The Data [PDF]

The Astrophysical Journal Supplement Series, 2000
We have obtained integrated spectra and multi-filter photometry for a repre- sentative sample of ~200 nearby galaxies. These galaxies span the entire Hubble sequence in morphological type, as well as a wide range of luminosities (M_B = -14 to -22) and colors (B-R=0.4 to 1.8).
Jansen, RA, Franx, M, Fabricant, D, Caldwell, N   +3 more
openaire   +3 more sources

Spectroscopy and multiband photometry of the afterglow of intermediate duration γ-ray burst GRB 040924 and its host galaxy [PDF]

, 2008
Aims. We present optical photometry and spectroscopy of the afterglow and host galaxy of gamma-ray burst GRB040924. This GRB had a rather short duration of T90 ∼ 2.4 s, and a well sampled optical afterglow light curve.
Kidger, M., Rol, E., Vreeswijk, P. M., Jelínek, Miroslav, Rol, Evert, B. L. Jensen (7612247), A. J. Castro-Tirado (7603481), M. Jelínek, Tristram, P. J., N. R. Tanvir (7601726), Castro-Tirado, A.J., Horst, A. J. van der, Starling, R.L.C., Kann, Alexander, P. Tristram, Wijers, R., Hjorth, J., Jensen, Brian, van der Horst, A., Castro-Tirado, A. J., B. L. Jensen, Wiersema, K., P. M. Vreeswijk (7601714), Guziy, S.S., S. S. Guziy (7622096), M. Kidger (7622099), van der Horst, A.J., R. A. M. J. Wijers (7590200), Jensen, Bente Lundgård, Tanvir, N.R., Hjorth, Jens, Tristam, P., Levan, A.J., Gorosabel, Javier, A. J. Castro-Tirado, De Ugarte Postigo A (7612730), Curran, Peter, Jensen, B. L., A. de Ugarte Postigo, F. Martín-Luis, Guziy, S. S., Gorosabel, J., N. R. Tanvir, Kidger, M, Tanvir, Nial R., S. S. Guziy, Martín-Luis, F., Fynbo, J., Tanvir, N., P. A. Curran (7604570), D. A. Kann (7613198), Postigo, A. de Ugarte, Castro-Tirado, A., A. Hornstrup, Wijers, R.A.M.J., Starling, Rhana, Levan, A., Hornstrup, Allan, Guziy, S., K. Wiersema (7601723), Starling, R., Fynbo, Johan Peter Uldall, Ugarte Postigo, A. de, Kann, D., Wiersema, Klaas, Martin-Luis, F, Fynbo, J.P.U., J. Hjorth (2463328), Van Der Horst AJ (7613657), M. Kidger, A. Hornstrup (7615838), Levan, A. J., Levan, Andrew, Hornstrup, A., Tanvir, N. R., Kann, D.A., A. J. Levan (7601735), de Ugarte Postigo, A., K. Wiersema, Jensen, B., E. Rol, Wiersema, Alexander, J. Gorosabel (7603436), Jensen, B.L., R. L. C. Starling (7584866), Tanvir, Nial, P. A. Curran, P. M. Vreeswijk, Starling, R. L. C., van der Horst, A. J., Wijers, R. A. M. J., J. Hjorth, P. Tristram (7622105), Vreeswijk, P., J. P. U. Fynbo (7603457), Curran, P. A., Wijers, Ralph, Fynbo, J. P. U., de Ugarte Postigo, Antonio, A. J. Levan, Castro-Tirado, Alberto, J. P. U. Fynbo, F. Martín-Luis (7622102), Kann, D. A., Vreeswijk, Paul Marijn, M. Jelínek (7611758), Tristram, P., R. A. M. J. Wijers, Wijers, Ralph Antoine Marie Joseph, Kidger, Mark R., Curran, P.A., R. L. C. Starling, J. Gorosabel, Vreeswijk, P.M., E. Rol (7601738), A. J. van der Horst, D. A. Kann, Jelinek, M.   +117 more
core   +1 more source

The level of photometry is the basic level of the Hungarian galaxy [PDF]

مجلة التربية والعلم, 2007
The photometric and fundamental plane for a sample of early type galaxies(elliptical and lenticular galaxies) which belongs to Virgo cluster have been calculated by fitting the Sersic model ( r1/n-model) to the surface brightness profiles along the major
Mohsen Ali, Saad Younis
doaj   +1 more source

The Farmer: A Reproducible Profile-fitting Photometry Package for Deep Galaxy Surveys

The Astrophysical Journal Supplement Series, 2023
While space-borne optical and near-infrared facilities have succeeded in delivering a precise and spatially resolved picture of our Universe, their small survey area is known to underrepresent the true diversity of galaxy populations.
J. R. Weaver, L. Zalesky, V. Kokorev, C. J. R. McPartland, N. Chartab, K. M. L. Gould, M. Shuntov, I. Davidzon, A. Faisst, N. Stickley, P. L. Capak, S. Toft, D. Masters, B. Mobasher, D. B. Sanders, O. B. Kauffmann, H. J. McCracken, O. Ilbert, G. Brammer, A. Moneti   +19 more
doaj   +1 more source

Made-to-measure dynamical particle models of elliptical galaxies [PDF]

, 2007
NMAGIC modelling: Syer and Tremaine (1996) proposed a made-to-measure (M2M) algorithmto construct N-particle systems from observational data and used it to generate a triaxial model from density observables.
De Lorenzi, F., De Lorenzi, Flavio
core   +1 more source