-
1
The Study of Nebular Emission on Nearby Spiral Galaxies in the IFU Era
Published 2013-01-01“…Here I review some highlights of our current studies employing this technique: (1) the case study of NGC 628, the largest galaxy ever sampled with an IFU; (2) a statistical approach to the abundance gradients of spiral galaxies, which indicates a universal radial gradient for oxygen abundance; and (3) the discovery of a new scaling relation of HII regions in spiral galaxies, the local mass-metallicity relation of star-forming galaxies. …”
Get full text
Article -
2
Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA
Published 2025-01-01“…This study analyzes oxygen abundance gradients in spiral galaxies based on observations from the Calar Alto Legacy Integral Field Area survey. …”
Get full text
Article -
3
Multiepoch Observations of the Nearby Spiral Galaxy NGC 3938 with the Chandra X-Ray Observatory
Published 2025-01-01Subjects: “…Spiral galaxies…”
Get full text
Article -
4
Analysis of ∼106 Spiral Galaxies from Four Telescopes Shows Large-Scale Patterns of Asymmetry in Galaxy Spin Directions
Published 2022-01-01“…This study uses large datasets collected by four different robotic telescopes to profile the large-scale distribution of the spin directions of spiral galaxies. These datasets cover the Northern and Southern hemispheres, in addition to data acquired from space by the Hubble Space Telescope. …”
Get full text
Article -
5
Deciphering Gas Dynamics and Star Formation in a z = 1.1 Main-sequence Spiral Galaxy with ALMA and JWST
Published 2025-01-01Get full text
Article -
6
Mapping the Active Galactic Nucleus Effects on the Stellar and Gas Properties of NGC 5806
Published 2025-01-01Subjects: Get full text
Article -
7
-
8
The Impact of Bar-induced Noncircular Motions on the Measurement of Galactic Rotation Curves
Published 2025-01-01Subjects: “…Barred spiral galaxies…”
Get full text
Article -
9
Comparison of Bar Formation Mechanisms. I. Does a Tidally Induced Bar Rotate Slower than an Internally Induced Bar?
Published 2025-01-01Subjects: Get full text
Article -
10
Overview of the Near-IR S0 Galaxy Survey (NIRS0S)
Published 2011-01-01“…As a comparison sample, a similar sized spiral galaxy sample with similar image quality was used. …”
Get full text
Article -
11
Modified Newtonian Dynamics: A Falsification of Cold Dark Matter
Published 2009-01-01“…This hypothesis, suggested by Milgrom, has been successful in explaining systematic properties of spiral and elliptical galaxies and predicting in detail the observed rotation curves of spiral galaxies with only one additional parameter—a critical acceleration which is on the order of the cosmologically interesting value of 𝑐𝐻𝑜. …”
Get full text
Article -
12
Astronomical Signatures of Dark Matter
Published 2014-01-01“…They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of galaxies, 21 cm line studies indicative of increasing mass to light ratios with radius in the halos of spiral galaxies, hot gaseous X-ray emitting halos around many elliptical galaxies, and clusters of galaxies requiring a much larger component of unseen mass for the hot gas to be bound. …”
Get full text
Article -
13
Are Nuclear Star Clusters the Precursors of Massive Black Holes?
Published 2012-01-01“…We present new upper limits for black hole masses in extremely late type spiral galaxies. We confirm that this class of galaxies has black holes with masses less than 106M⊙, if any. …”
Get full text
Article -
14
HCG 57: Evidence for Shock-heated Intergalactic Gas from X-Rays and Optical Emission Line Spectroscopy
Published 2025-01-01“…We present Chandra and XMM-Newton X-ray observations of the compact group HCG 57, and optical integral field spectroscopy of the interacting galaxy pair HCG 57A/D. These two spiral galaxies recently suffered an off-axis collision with HCG 57D passing through the disk of A. …”
Get full text
Article