Results 61 to 70 of about 192,158 (225)
JWST Photometry of Globular Cluster Populations in MACS0417.5−1154
The Astrophysical JournalDeep JWST imaging of the massive galaxy cluster MACS0417.5−1154, at redshift z = 0.443, reveals a huge population of globular clusters (GCs) and ultracompact dwarfs (UCDs) primarily distributed around its single central giant brightest cluster galaxy ...
William E. Harris +10 more
doaj +1 more source
PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field
The Astrophysical Journal Supplement Series, 2023 We present near-infrared (NIR) ground-based Y , J , H , and K imaging obtained in the James Webb Space Telescope (JWST) North Ecliptic Pole Time Domain Field (NEP TDF) using the MMT-Magellan Infrared Imager and Spectrometer on the MMT.
Christopher N. A. Willmer +25 more
doaj +1 more source
HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa
Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley +1 more source
The Structure of Galaxies I: Surface Photometry Techniques [PDF]
Publications of the Astronomical Society of Australia, 2012 AbstractThis project uses the 2MASS all-sky image database to study the structure of galaxies over a range of luminosities, sizes and morphological types. This first paper in this series will outline the techniques, reliability and data products to our surface photometry program.
Schombert, James, Smith, Anna K.
openaire +2 more sources
The Astrophysical Journal Supplement SeriesWe present NIRCam and NIRISS modules for DOLPHOT, a widely used crowded-field stellar photometry package. We describe details of the modules including pixel masking, astrometric alignment, star finding, photometry, catalog creation, and artificial star ...
Daniel R. Weisz +40 more
doaj +1 more source
Surface Photometry of Spiral Galaxy NGC 5005 and Elliptical Galaxy NGC 4278
مجلة بغداد للعلوم, 2018 Two galaxies have been chosen, spiral galaxy NGC 5005 and elliptical galaxy NGC 4278 to study their photometric properties by using surface photometric techniques with griz-Filters. Observations are obtained from the Sloan Digital Sky Survey (SDSS).
Baghdad Science Journal
doaj +1 more source
Reassessing the Relationship Between Meteor Radio Afterglows and Optical Persistent Trains
Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.Abstract Meteor radio afterglows (MRAs) and optical persistent trains (PTs) are two types of long‐lived phenomena which are occasionally observed following the occurrence of a meteor. Both phenomena are thought to be produced by intrinsic emission mechanisms; PTs have been associated with chemiluminescent reactions between meteoric metals and ...
L. E. Cordonnier +5 more
wiley +1 more source
, 2019 We present \textsc{speculator} -- a fast, accurate, and flexible framework for emulating stellar population synthesis (SPS) models for predicting galaxy spectra and photometry. For emulating spectra, we use principal component analysis to construct a set
Leja, Joel +8 more
core +2 more sources
pop-cosmos: A Comprehensive Picture of the Galaxy Population from COSMOS Data
The Astrophysical Journal Supplement SeriesWe present pop-cosmos : a comprehensive model characterizing the galaxy population, calibrated to 140,938 ( r < 25 selected) galaxies from the Cosmic Evolution Survey (COSMOS) with photometry in 26 bands from the ultraviolet to the infrared. We construct
Justin Alsing +6 more
doaj +1 more source
The Astrophysical JournalTraditional spectral energy distribution (SED)–fitting methods for stellar mass estimation face persistent challenges including systematic biases and computational constraints.
Vahid Asadi +2 more
doaj +1 more source