Results 41 to 50 of about 70,641 (273)
Outlier Detection in the DESI Bright Galaxy Survey
The Astrophysical Journal Letters, 2023 We present an unsupervised search for outliers in the Bright Galaxy Survey (BGS) data set from the DESI Early Data Release. This analysis utilizes an autoencoder to compress galaxy spectra into a compact, redshift-invariant latent space, and a ...
Yan Liang +5 more
doaj +1 more source
Mapping the Galaxy Color-Redshift Relation: Optimal Photometric Redshift Calibration Strategies for Cosmology Surveys [PDF]
, 2015 Calibrating the photometric redshifts of >10^9 galaxies for upcoming weak lensing cosmology experiments is a major challenge for the astrophysics community.
Brescia, Massimo +19 more
core +6 more sources
The Astrophysical Journal, 2023 Current methods of identifying the ionizing source of nebular emission in galaxies are well defined for the era of single-fiber spectroscopy, but still struggle to differentiate the complex and overlapping ionization sources in some galaxies.
Victor D. Johnston +13 more
doaj +1 more source
On-axis spectroscopy of the host galaxies of 20 optically luminous quasars at z~0.3 [PDF]
, 2006 We present the analysis of a sample of 20 bright low-redshift quasars ...
Courbin, F. +6 more
core +4 more sources
The Astrophysical Journal, 2023 The Dragonfly galaxy (MRC 0152-209), the most infrared-luminous radio galaxy at redshift z ∼ 2, is a merger system containing a powerful radio source and large displacements of gas.
Sophie Lebowitz +10 more
doaj +1 more source
Measuring Outer Disk Warps with Optical Spectroscopy
, 2008 Warps in the outer gaseous disks of galaxies are a ubiquitous phenomenon, but it is unclear what generates them. One theory is that warps are generated internally through spontaneous bending instabilities. Other theories suggest that they result from the
Bland-Hawthorn, Joss, Christlein, Daniel
core +1 more source
The AGN and Gas Disk in the Low Surface Brightness Galaxy PGC045080 [PDF]
, 2007 We present radio observations and optical spectroscopy of the giant low surface brightness (LSB) galaxy PGC 045080 (or 1300+0144). PGC 045080 is a moderately distant galaxy having a highly inclined optical disk and massive HI gas content. Radio continuum
Das, M. +5 more
core +2 more sources
Spectroscopic Confirmation of Multiple Red Galaxy-Galaxy Mergers in MS1054-03 (z=0.83)
, 2005 We present follow-up spectroscopy of the galaxy cluster MS1054-03 (z=0.83) confirming that at least six of the nine merging galaxy pairs identified by van Dokkum et al.
Franx, Marijn +5 more
core +1 more source
Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
When is a Bulge Not a Bulge? Revealing the Satellite Nature of NGC 5474’s Bulge
The Astrophysical JournalA satellite galaxy of the nearby spiral M101, NGC 5474 has a prominent bulge offset from the kinematic center of the underlying star-forming disk that has gained attention in recent years.
Ray Garner III +2 more
doaj +1 more source