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Title: Star-forming Filament Models

Abstract

New models of star-forming filamentary clouds are presented in order to quantify their properties and to predict their evolution. These 2D axisymmetric models describe filaments that have no core, one low-mass core, and one cluster-forming core. They are based on Plummer-like cylinders and spheroids that are bounded by a constant-density surface of finite extent. In contrast to 1D Plummer-like models, they have specific values of length and mass, they approximate observed column density maps, and their distributions of column density ( N -pdfs) are pole-free. Each model can estimate the star-forming potential of a core-filament system by identifying the zone of gas dense enough to form low-mass stars and by counting the number of enclosed thermal Jeans masses. This analysis suggests that the Musca central filament may be near the start of its star-forming life, with enough dense gas to make its first ∼3 protostars, while the Coronet filament is near the midpoint of its star formation, with enough dense gas to add ∼8 protostars to its ∼20 known stars. In contrast, L43 appears to be near the end of its star-forming life, since it lacks enough dense gas to add any new protostars to the two young stellar objectsalreadymore » known.« less

Authors:
 [1]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
Publication Date:
OSTI Identifier:
22661269
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 838; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; AXIAL SYMMETRY; CLOUDS; COMPUTERIZED SIMULATION; DENSITY; DISTRIBUTION; EVOLUTION; FILAMENTS; MASS; PROTOSTARS; STAR EVOLUTION; STARS; SURFACES; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Myers, Philip C., E-mail: pmyers@cfa.harvard.edu. Star-forming Filament Models. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA5FA8.
Myers, Philip C., E-mail: pmyers@cfa.harvard.edu. Star-forming Filament Models. United States. doi:10.3847/1538-4357/AA5FA8.
Myers, Philip C., E-mail: pmyers@cfa.harvard.edu. Mon . "Star-forming Filament Models". United States. doi:10.3847/1538-4357/AA5FA8.
@article{osti_22661269,
title = {Star-forming Filament Models},
author = {Myers, Philip C., E-mail: pmyers@cfa.harvard.edu},
abstractNote = {New models of star-forming filamentary clouds are presented in order to quantify their properties and to predict their evolution. These 2D axisymmetric models describe filaments that have no core, one low-mass core, and one cluster-forming core. They are based on Plummer-like cylinders and spheroids that are bounded by a constant-density surface of finite extent. In contrast to 1D Plummer-like models, they have specific values of length and mass, they approximate observed column density maps, and their distributions of column density ( N -pdfs) are pole-free. Each model can estimate the star-forming potential of a core-filament system by identifying the zone of gas dense enough to form low-mass stars and by counting the number of enclosed thermal Jeans masses. This analysis suggests that the Musca central filament may be near the start of its star-forming life, with enough dense gas to make its first ∼3 protostars, while the Coronet filament is near the midpoint of its star formation, with enough dense gas to add ∼8 protostars to its ∼20 known stars. In contrast, L43 appears to be near the end of its star-forming life, since it lacks enough dense gas to add any new protostars to the two young stellar objectsalready known.},
doi = {10.3847/1538-4357/AA5FA8},
journal = {Astrophysical Journal},
number = 1,
volume = 838,
place = {United States},
year = {Mon Mar 20 00:00:00 EDT 2017},
month = {Mon Mar 20 00:00:00 EDT 2017}
}