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Observations and Theory of Dynamical Triggers for Star Formation

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arxiv astro-ph/9712352 v1 pith:YNYSCFJT submitted 1997-12-31 astro-ph

B. G. Elmegreen (IBM Research Division , T.J. Watson Research Center) This is my paper · ORCID
classification astro-ph
keywords collapsecloudsformationstarcompressiondisksdynamicalgalaxy
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Star formation triggering mechanisms are reviewed, including the direct compression of clouds and globules, the compression and collapse of molecular clouds at the edges of HII regions and supernovae, the expansion and collapse of giant rings and shells in galaxy disks, and the collision and collapse between two clouds. Collapse criteria are given. A comprehensive tabulation of regions where these four types of triggering have been found suggests that dynamical processes sustain and amplify a high fraction of all star formation that begins spontaneously in normal galaxy disks.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 14 citations worldwide. Full citation record

  1. Unveiling the enigma of the Nakashima-Deguchi object (IRAS 19312+1950): a candidate Orion KL analog

    astro-ph.GA 2026-07 conditional novelty 6.5 of 10

    Multi-telescope continuum and line data show NDO (IRAS 19312+1950) hosts cold dense gas with deuterated species and a bipolar outflow, making it a candidate Orion KL analog at ~3.8 kpc.

  2. FEAST: JWST/NIRCam view of the Resolved Stellar Populations of the Interacting Dwarf Galaxies NGC~4485/NGC~4490

    astro-ph.GA 2025-09 conditional novelty 6.0 of 10

    JWST/NIRCam resolves stellar populations in the interacting dwarf pair NGC 4485/NGC 4490, revealing star formation bursts roughly 30 and 200 Myr ago and a metallicity gradient across the tidal bridge.

  3. SN 2022acko and the Properties of its Red Supergiant Progenitor: Direct Detection, Light Curves, and Nebular Spectroscopy

    astro-ph.HE 2025-09 conditional novelty 5.0 of 10

    The progenitor mass of SN 2022acko inferred from pre-explosion images (7.5 Msun) disagrees with masses from light-curve and spectral modeling (9-15 Msun), with the tension likely caused by model and calibration systematics.

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