Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Global spiral patterns in galaxies: complexity and simplicity.

C C Lin1

  • 1Department of Mathematics, Massachusetts Institute of Technology, Cambridge 02139, USA.

Annals of the New York Academy of Sciences
|June 29, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

cGMP-elevating agents suppress proliferation of vascular smooth muscle cells by inhibiting the activation of epidermal growth factor signaling pathway.

Circulation·1997
Same author

Higher-order organization of subrepeats and the evolution of cervid satellite I DNA.

Journal of molecular evolution·1997
Same author

Comparisons of geniposidic acid and geniposide on antitumor and radioprotection after sublethal irradiation.

Cancer letters·1997
Same author

Double mycotic aneurysms of the ascending aorta.

The Annals of thoracic surgery·1997
Same author

Evaluation of four prescriptions of traditional Chinese medicine: syh-mo-yiin, guizhi-fuling-wan, shieh-qing-wan and syh-nih-sann on experimental acute liver damage in rats.

Journal of ethnopharmacology·1997
Same author

Effects of oleanolic acid and ursolic acid on inhibiting tumor growth and enhancing the recovery of hematopoietic system postirradiation in mice.

Cancer letters·1997
Same journal

Multiomics Profiling During Autoimmune Demyelination Highlights a Complex Regulatory Role for Ataxin-1 in B Cells.

Annals of the New York Academy of Sciences·2026
Same journal

Global Trends in Light Pollution and Their Relationship With Socioeconomic Factors.

Annals of the New York Academy of Sciences·2026
Same journal

Wired for Corruption: Inter-Brain Synchrony Encodes Bribery-Related Value Information and Predicts Bribery Agreement.

Annals of the New York Academy of Sciences·2026
Same journal

LM-YOLO: A Lightweight Multi-Scale Enhanced Model for Forest Smoke Detection Using Unmanned Aerial Vehicles.

Annals of the New York Academy of Sciences·2026
Same journal

Polyrhythm Perception and Production: A Scoping Review.

Annals of the New York Academy of Sciences·2026
Same journal

DARTS-CNN-BiLSTM: Intelligent Fault Diagnosis for Computer Numerical Control Machine Tool Feed System.

Annals of the New York Academy of Sciences·2026
See all related articles

The density wave theory explains galactic spiral structure using quasi-stationary patterns. This robust model, supported by observations and modal studies, accounts for differing structures in star populations and minimizes tidal interaction

Area of Science:

  • Astrophysics and cosmology
  • Galactic dynamics and structure

Background:

  • The density wave theory, centered on quasi-stationary spiral structure, offers explanations for galactic morphology.
  • Empirical evidence, including infrared galaxy images and spiral arm amplitude modulation, supports this hypothesis.
  • The theory addresses the Hubble classification system and other galactic categorical classes.

Purpose of the Study:

  • To review the density wave theory of galactic spirals, clarifying its fundamentals and addressing specific literature issues.
  • To provide further theoretical and observational support for the quasi-stationary spiral structure hypothesis.
  • To contextualize the theory within the broader study of complex systems and mathematical modeling.

Main Methods:

  • Review of existing literature on the density wave theory and galactic spiral structure.

Related Experiment Videos

  • Analysis of observational data, including infrared galaxy images and spiral arm characteristics.
  • Theoretical examination through modal studies and comparison of stellar population structures (Pop I vs. Pop II).

    • Main Results:

    • The quasi-stationary spiral structure hypothesis is widely applicable and supported by empirical data.
    • The difference between regular Pop II and irregular Pop I structures is explained by the epicycle diameter relative to spiral arm spacing.
    • The theory suggests a limited role for tidal interactions in shaping global spiral structure, favoring intrinsic mechanisms.

    Conclusions:

    • The density wave theory provides a robust framework for understanding galactic spiral structure, consistent with observations.
    • The observed regularity of spiral arms, despite turbulent motions in Pop I objects, highlights the theory's predictive power.
    • Intrinsic mechanisms are likely more significant than tidal interactions for the global spiral structure of galaxies.