The Green Bank Ammonia Survey: A Virial Analysis of Gould Belt Clouds in Data Release 1

Ronan Kerr, Helen Kirk, James Di Francesco, Jared Keown, Mike Chen, Erik Rosolowsky, Stella S.R. Offner, Rachel Friesen, Jaime E. Pineda, Yancy L Shirley, Elena Redaelli, Paola Caselli, Anna Punanova, Youngmin Seo, Felipe Alves, Ana Chacón-Tanarro, Hope How-Huan Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We perform a virial analysis of starless dense cores in three nearby star-forming regions: L1688 in Ophiuchus, NGC 1333 in Perseus, and B18 in Taurus. Our analysis takes advantage of comprehensive kinematic information for the dense gas in all of these regions made publicly available through the Green Bank Ammonia Survey Data Release 1, which is used to estimate internal support against collapse. We combine this information with ancillary data used to estimate other important properties of the cores, including continuum data from the James Clerk Maxwell Telescope Gould Belt Survey for core identification, core masses, and core sizes. Additionally, we used Planck- and Herschel-based column density maps for external cloud weight pressure and Five College Radio Astronomy Observatory 13 CO observations for external turbulent pressure. Our self-consistent analysis suggests that many dense cores in all three star-forming regions are not bound by gravity alone, but rather require additional pressure confinement to remain bound. Unlike a recent, similar study in Orion A, we find that turbulent pressure represents a significant portion of the external pressure budget. Our broad conclusion emphasizing the importance of pressure confinement in dense core evolution, however, agrees with earlier work.

Original languageEnglish (US)
Article number147
JournalAstrophysical Journal
Volume874
Issue number2
DOIs
StatePublished - Apr 1 2019

Fingerprint

ammonia
stars
radio astronomy
astronomy
estimates
analysis
budgets
observatory
kinematics
observatories
radio
gravity
telescopes
gravitation
continuums
gas
gases

Keywords

  • ISM: kinematics and dynamics
  • stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Kerr, R., Kirk, H., Di Francesco, J., Keown, J., Chen, M., Rosolowsky, E., ... How-Huan Chen, H. (2019). The Green Bank Ammonia Survey: A Virial Analysis of Gould Belt Clouds in Data Release 1. Astrophysical Journal, 874(2), [147]. https://doi.org/10.3847/1538-4357/ab0c08

The Green Bank Ammonia Survey : A Virial Analysis of Gould Belt Clouds in Data Release 1. / Kerr, Ronan; Kirk, Helen; Di Francesco, James; Keown, Jared; Chen, Mike; Rosolowsky, Erik; Offner, Stella S.R.; Friesen, Rachel; Pineda, Jaime E.; Shirley, Yancy L; Redaelli, Elena; Caselli, Paola; Punanova, Anna; Seo, Youngmin; Alves, Felipe; Chacón-Tanarro, Ana; How-Huan Chen, Hope.

In: Astrophysical Journal, Vol. 874, No. 2, 147, 01.04.2019.

Research output: Contribution to journalArticle

Kerr, R, Kirk, H, Di Francesco, J, Keown, J, Chen, M, Rosolowsky, E, Offner, SSR, Friesen, R, Pineda, JE, Shirley, YL, Redaelli, E, Caselli, P, Punanova, A, Seo, Y, Alves, F, Chacón-Tanarro, A & How-Huan Chen, H 2019, 'The Green Bank Ammonia Survey: A Virial Analysis of Gould Belt Clouds in Data Release 1', Astrophysical Journal, vol. 874, no. 2, 147. https://doi.org/10.3847/1538-4357/ab0c08
Kerr, Ronan ; Kirk, Helen ; Di Francesco, James ; Keown, Jared ; Chen, Mike ; Rosolowsky, Erik ; Offner, Stella S.R. ; Friesen, Rachel ; Pineda, Jaime E. ; Shirley, Yancy L ; Redaelli, Elena ; Caselli, Paola ; Punanova, Anna ; Seo, Youngmin ; Alves, Felipe ; Chacón-Tanarro, Ana ; How-Huan Chen, Hope. / The Green Bank Ammonia Survey : A Virial Analysis of Gould Belt Clouds in Data Release 1. In: Astrophysical Journal. 2019 ; Vol. 874, No. 2.
@article{507a8a7dc5c94217a92852bce72e8954,
title = "The Green Bank Ammonia Survey: A Virial Analysis of Gould Belt Clouds in Data Release 1",
abstract = "We perform a virial analysis of starless dense cores in three nearby star-forming regions: L1688 in Ophiuchus, NGC 1333 in Perseus, and B18 in Taurus. Our analysis takes advantage of comprehensive kinematic information for the dense gas in all of these regions made publicly available through the Green Bank Ammonia Survey Data Release 1, which is used to estimate internal support against collapse. We combine this information with ancillary data used to estimate other important properties of the cores, including continuum data from the James Clerk Maxwell Telescope Gould Belt Survey for core identification, core masses, and core sizes. Additionally, we used Planck- and Herschel-based column density maps for external cloud weight pressure and Five College Radio Astronomy Observatory 13 CO observations for external turbulent pressure. Our self-consistent analysis suggests that many dense cores in all three star-forming regions are not bound by gravity alone, but rather require additional pressure confinement to remain bound. Unlike a recent, similar study in Orion A, we find that turbulent pressure represents a significant portion of the external pressure budget. Our broad conclusion emphasizing the importance of pressure confinement in dense core evolution, however, agrees with earlier work.",
keywords = "ISM: kinematics and dynamics, stars: formation",
author = "Ronan Kerr and Helen Kirk and {Di Francesco}, James and Jared Keown and Mike Chen and Erik Rosolowsky and Offner, {Stella S.R.} and Rachel Friesen and Pineda, {Jaime E.} and Shirley, {Yancy L} and Elena Redaelli and Paola Caselli and Anna Punanova and Youngmin Seo and Felipe Alves and Ana Chac{\'o}n-Tanarro and {How-Huan Chen}, Hope",
year = "2019",
month = "4",
day = "1",
doi = "10.3847/1538-4357/ab0c08",
language = "English (US)",
volume = "874",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - The Green Bank Ammonia Survey

T2 - A Virial Analysis of Gould Belt Clouds in Data Release 1

AU - Kerr, Ronan

AU - Kirk, Helen

AU - Di Francesco, James

AU - Keown, Jared

AU - Chen, Mike

AU - Rosolowsky, Erik

AU - Offner, Stella S.R.

AU - Friesen, Rachel

AU - Pineda, Jaime E.

AU - Shirley, Yancy L

AU - Redaelli, Elena

AU - Caselli, Paola

AU - Punanova, Anna

AU - Seo, Youngmin

AU - Alves, Felipe

AU - Chacón-Tanarro, Ana

AU - How-Huan Chen, Hope

PY - 2019/4/1

Y1 - 2019/4/1

N2 - We perform a virial analysis of starless dense cores in three nearby star-forming regions: L1688 in Ophiuchus, NGC 1333 in Perseus, and B18 in Taurus. Our analysis takes advantage of comprehensive kinematic information for the dense gas in all of these regions made publicly available through the Green Bank Ammonia Survey Data Release 1, which is used to estimate internal support against collapse. We combine this information with ancillary data used to estimate other important properties of the cores, including continuum data from the James Clerk Maxwell Telescope Gould Belt Survey for core identification, core masses, and core sizes. Additionally, we used Planck- and Herschel-based column density maps for external cloud weight pressure and Five College Radio Astronomy Observatory 13 CO observations for external turbulent pressure. Our self-consistent analysis suggests that many dense cores in all three star-forming regions are not bound by gravity alone, but rather require additional pressure confinement to remain bound. Unlike a recent, similar study in Orion A, we find that turbulent pressure represents a significant portion of the external pressure budget. Our broad conclusion emphasizing the importance of pressure confinement in dense core evolution, however, agrees with earlier work.

AB - We perform a virial analysis of starless dense cores in three nearby star-forming regions: L1688 in Ophiuchus, NGC 1333 in Perseus, and B18 in Taurus. Our analysis takes advantage of comprehensive kinematic information for the dense gas in all of these regions made publicly available through the Green Bank Ammonia Survey Data Release 1, which is used to estimate internal support against collapse. We combine this information with ancillary data used to estimate other important properties of the cores, including continuum data from the James Clerk Maxwell Telescope Gould Belt Survey for core identification, core masses, and core sizes. Additionally, we used Planck- and Herschel-based column density maps for external cloud weight pressure and Five College Radio Astronomy Observatory 13 CO observations for external turbulent pressure. Our self-consistent analysis suggests that many dense cores in all three star-forming regions are not bound by gravity alone, but rather require additional pressure confinement to remain bound. Unlike a recent, similar study in Orion A, we find that turbulent pressure represents a significant portion of the external pressure budget. Our broad conclusion emphasizing the importance of pressure confinement in dense core evolution, however, agrees with earlier work.

KW - ISM: kinematics and dynamics

KW - stars: formation

UR - http://www.scopus.com/inward/record.url?scp=85064461922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064461922&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ab0c08

DO - 10.3847/1538-4357/ab0c08

M3 - Article

AN - SCOPUS:85064461922

VL - 874

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 147

ER -