منابع مشابه
Cold dust in the starburst galaxy M 82
The starburst galaxy M82 has been mapped at λ1.2 mm using the IRAM 30–m telescope and the MPIfR 19–channel bolometer. The influence of the sidelobe pattern and the CO(2−1) line has been carefully analyzed. Based on this analysis, we conclude that the cold dust does not extend far into the halo as has been previously claimed. The total mass of dust in the inner 3 kpc of the galaxy is 7.5 · 10 M⊙...
متن کاملStar formation time - scales in the nearby , prototype starburst galaxy M 82
The last tidal encounter between M82 and M81, some 500 Myr ago, had a major impact on what was probably an otherwise normal, quiescent disc galaxy. It caused a concentrated burst of star formation in the form of massive star clusters, which decreased rapidly, within a few 100 Myr. The current starburst in the centre of the galaxy is likely either due to large-scale propagating star formation or...
متن کاملWidespread Hco Emission in the M 82's Nuclear Starburst
We present a high-resolution (∼5 ") image of the nucleus of M 82 showing the presence of widespread emission of the formyl radical (HCO). The HCO map, the first obtained in an external galaxy, reveals the existence of a structured disk of ∼650 pc full diameter. The HCO distribution in the plane mimics the ring morphology displayed by other molecular/ionized gas tracers in M 82. More precisely, ...
متن کاملAstronomy and Astrophysics Dense Gas in Nearby Galaxies Xiii. Co Submillimeter Line Emission from the Starburst Galaxy M 82
CO J = 1–0, 2–1, 4–3, 7–6, and CO 1– 0, 2–1, and 3–2 line emission was mapped with angular resolutions of 13 – 22 toward the nuclear region of the archetypical starburst galaxy M82. There are two hotspots on either side of the dynamical center, with the south-western lobe being slightly more prominent. Lobe spacings are not identical for all transitions: For the submillimeter CO lines, the spac...
متن کاملStarburst 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...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1999
ISSN: 0074-1809
DOI: 10.1017/s0074180900206748