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

Stellar feedback in dwarf galaxy formation.

Sergey Mashchenko1, James Wadsley, H M P Couchman

  • 1Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1, Canada. syam@physics.mcmaster.ca

Science (New York, N.Y.)
|December 1, 2007
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

The removal of cusps from galaxy centres by stellar feedback in the early Universe.

Nature·2006
Same author

Formation of giant planets by fragmentation of protoplanetary disks.

Science (New York, N.Y.)·2002
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
See all related articles

Stellar feedback in dwarf galaxies resolves the core-cusp problem by driving gas motions that flatten the central dark matter density profile, aligning simulations with observations.

Area of Science:

  • Cosmology
  • Astrophysics
  • Galaxy Formation

Background:

  • Dwarf galaxies present challenges to cosmological models, particularly the discrepancy between predicted central dark matter density (cusp) and observed density (core).
  • Stellar feedback, including supernova explosions and stellar winds, is hypothesized to influence dwarf galaxy evolution and resolve this core-cusp problem.

Purpose of the Study:

  • To investigate the impact of stellar feedback on the structure of dwarf galaxies using high-resolution cosmological simulations.
  • To assess how stellar feedback affects observable properties and resolves the core-cusp problem in dwarf galaxy models.

Main Methods:

  • Detailed cosmological simulations were performed with sufficient resolution to capture key physical processes.
  • The simulations directly modeled the effects of stellar feedback on interstellar gas and dark matter distribution.

Related Experiment Videos

Main Results:

  • Stellar feedback was shown to induce large-scale, bulk motions of interstellar gas within dwarf galaxies.
  • These gas motions led to significant fluctuations in the gravitational potential.
  • The gravitational potential fluctuations resulted in a reduction of the central dark matter density, creating a core profile.

Conclusions:

  • Stellar feedback is a crucial mechanism for shaping the central structure of dwarf galaxies.
  • The inclusion of stellar feedback in simulations successfully reconciles theoretical predictions with observational evidence of cored dark matter density profiles in dwarf galaxies.