Results 1 to 10 of about 192,158 (225)

Improved GALEX UV Photometry for 700,000 SDSS Galaxies

open access: yesThe 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   +4 more
doaj   +3 more sources

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

open access: yesThe 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   +18 more
doaj   +1 more source

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

open access: yesThe 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   +3 more
doaj   +1 more source

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

open access: yesمجلة 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

Study photometric properties of spiral galaxy NGC 4448 using CCD camera with multiband filters

open access: yesIraqi Journal of Physics, 2018
The goal of our study is to perform detailed multiband surface photometry of the spiral galaxy NGC 4448 and its brightest star-forming regions. The structure and composition of the stellar population in the surface brightness galaxy NGC 4448 was studied
Sinan H. Ali
doaj   +1 more source

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

open access: yesThe 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   +19 more
doaj   +1 more source

Comparing Globular Cluster System Properties with Host Galaxy Environment

open access: yesThe Astrophysical Journal, 2023
We present Hubble Space Telescope photometry in the optical (F475X) and near-infrared (F110W) bands of the globular cluster (GC) systems of the inner halos of a sample of 15 massive elliptical galaxies.
Kate Hartman   +4 more
doaj   +1 more source

A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2

open access: yesThe Astrophysical Journal Supplement Series, 2022
We present a catalog of 1.4 million photometrically selected quasar candidates in the southern hemisphere over the ∼5000 deg ^2 Dark Energy Survey (DES) wide survey area. We combine optical photometry from the DES second data release (DR2) with available
Qian Yang, Yue Shen
doaj   +1 more source

A New Wide-field Infrared Survey Explorer Calibration of Stellar Mass

open access: yesThe Astrophysical Journal, 2023
We derive new empirical scaling relations between Wide-field Infrared Survey Explorer (WISE) mid-IR (MIR) galaxy photometry and well-determined stellar masses from spectral energy distribution modeling of a suite of optical–infrared photometry provided ...
T. H. Jarrett   +5 more
doaj   +1 more source

Searching for Dwarf Hα Emission-line Galaxies within Voids. I. Survey Methods and First Observations

open access: yesThe Astrophysical Journal, 2023
The population density of dwarf galaxies in low-density voids is likely determined by the dark matter halo mass function and how galaxy formation proceeds in smaller halos.
Christian D. Draper   +5 more
doaj   +1 more source

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