GRAVITATIONAL FRAGMENTATION IN GALAXY MERGERS: A STABILITY CRITERION
نویسندگان
چکیده
منابع مشابه
Starburst in multiple galaxy mergers
We numerically investigate stellar and gaseous dynamical evolution of mergers between five identical late-type disk galaxies with the special emphasis on star formation history and chemical evolution of multiple galaxy mergers. We found that multiple encounter and merging can trigger repetitive massive starbursts (typically ∼ 100 M yr−1) owing to the strong tidal disturbance and the resultant g...
متن کاملGalaxy Mergers: A Search for Chemical Signatures
We have gathered high resolution échelle spectra for more than two dozen high-velocity metal-poor field stars, including BD+80 245, a star previously known to have extremely low [α/Fe] abundances, as well as G4-36, a new low [α/Fe] star with unusually large [Ni/Fe]. In this kinematically selected sample, other chemically anomalous stars have also been uncovered. In addition to deriving the α-el...
متن کاملFormation of globular clusters in galaxy mergers
Our numerical simulations first demonstrate that the pressure of ISM in a major merger becomes so high (> 105 kB K cm−3) that GMCs in the merger can collapse to form globular clusters (GCs) within a few Myr. The star formation efficiency within a GMC in galaxy mergers can rise up from a few percent to ∼ 80 percent, depending on the shapes and the temperature of the GMC. This implosive GC format...
متن کاملHost galaxy identification for binary black hole mergers with long baseline gravitational wave detectors
The detection of three black hole binary coalescence events by Advanced LIGO allows the science benefits of future detectors to be evaluated. In this paper we report the science benefits of one or two 8km arm length detectors based on the doubling of key parameters in an advanced LIGO type detector, combined with realisable enhancements. It is shown that the total detection rate for sources sim...
متن کاملFully Compressive Tides in Galaxy Mergers
The disruptive effect of galactic tides is a textbook example of gravitational dynamics. However, depending on the shape of the potential, tides can also become fully compressive. When that is the case, they might trigger or strengthen the formation of galactic substructures (star clusters, tidal dwarf galaxies), instead of destroying them. We perform N -body simulations of interacting galaxies...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2013
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/763/1/39