CARMA large area star formation survey: Project overview with analysis of dense gas structure and kinematics in Barnard 1

Shaye Storm, Lee G. Mundy, Manuel Fernández-López, Katherine I. Lee, Leslie W. Looney, Peter Teuben, Erik Rosolowsky, Héctor G. Arce, Eve C. Ostriker, Dominique M. Segura-Cox, Marc W. Pound, Demerese M. Salter, Nikolaus H. Volgenau, Yancy L Shirley, Che Yu Chen, Hao Gong, Adele L. Plunkett, John J. Tobin, Woojin Kwon, Andrea IsellaJens Kauffmann, Konstantinos Tassis, Richard M. Crutcher, Charles F. Gammie, Leonardo Testi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We present details of the CARMA Large Area Star Formation Survey (CLASSy), while focusing on observations of Barnard 1. CLASSy is a CARMA Key Project that spectrally imaged N2H+, HCO+, and HCN (J = 1 → 0 transitions) across over 800 square arcminutes of the Perseus and Serpens Molecular Clouds. The observations have angular resolution near 7″ and spectral resolution near 0.16 km s-1. We imaged 150 square arcminutes of Barnard 1, focusing on the main core, and the B1 Ridge and clumps to its southwest. N2H+ shows the strongest emission, with morphology similar to cool dust in the region, while HCO+ and HCN trace several molecular outflows from a collection of protostars in the main core. We identify a range of kinematic complexity, with N2H+ velocity dispersions ranging from 0.05 to 0.50 km s-1 across the field. Simultaneous continuum mapping at 3 mm reveals six compact object detections, three of which are new detections. A new, non-binary dendrogram algorithm is used to analyze dense gas structures in the N2H+ position-position-velocity (PPV) cube. The projected sizes of dendrogram-identified structures range from about 0.01 to 0.34 pc. Size-linewidth relations using those structures show that non-thermal line-of-sight velocity dispersion varies weakly with projected size, while rms variation in the centroid velocity rises steeply with projected size. Comparing these relations, we propose that all dense gas structures in Barnard 1 have comparable depths into the sky, around 0.1-0.2 pc; this suggests that overdense, parsec-scale regions within molecular clouds are better described as flattened structures rather than spherical collections of gas. Science-ready PPV cubes for Barnard 1 molecular emission are available for download.

Original languageEnglish (US)
Article number165
JournalAstrophysical Journal
Volume794
Issue number2
DOIs
StatePublished - Oct 20 2014

Fingerprint

star formation
kinematics
gases
gas
molecular clouds
protostars
clumps
angular resolution
spectral resolution
centroids
line of sight
sky
ridges
outflow
dust
project
analysis
continuums
detection

Keywords

  • ISM: clouds
  • ISM: kinematics and dynamics
  • ISM: molecules
  • ISM: structure
  • stars: formation

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Storm, S., Mundy, L. G., Fernández-López, M., Lee, K. I., Looney, L. W., Teuben, P., ... Testi, L. (2014). CARMA large area star formation survey: Project overview with analysis of dense gas structure and kinematics in Barnard 1. Astrophysical Journal, 794(2), [165]. https://doi.org/10.1088/0004-637X/794/2/165

CARMA large area star formation survey : Project overview with analysis of dense gas structure and kinematics in Barnard 1. / Storm, Shaye; Mundy, Lee G.; Fernández-López, Manuel; Lee, Katherine I.; Looney, Leslie W.; Teuben, Peter; Rosolowsky, Erik; Arce, Héctor G.; Ostriker, Eve C.; Segura-Cox, Dominique M.; Pound, Marc W.; Salter, Demerese M.; Volgenau, Nikolaus H.; Shirley, Yancy L; Chen, Che Yu; Gong, Hao; Plunkett, Adele L.; Tobin, John J.; Kwon, Woojin; Isella, Andrea; Kauffmann, Jens; Tassis, Konstantinos; Crutcher, Richard M.; Gammie, Charles F.; Testi, Leonardo.

In: Astrophysical Journal, Vol. 794, No. 2, 165, 20.10.2014.

Research output: Contribution to journalArticle

Storm, S, Mundy, LG, Fernández-López, M, Lee, KI, Looney, LW, Teuben, P, Rosolowsky, E, Arce, HG, Ostriker, EC, Segura-Cox, DM, Pound, MW, Salter, DM, Volgenau, NH, Shirley, YL, Chen, CY, Gong, H, Plunkett, AL, Tobin, JJ, Kwon, W, Isella, A, Kauffmann, J, Tassis, K, Crutcher, RM, Gammie, CF & Testi, L 2014, 'CARMA large area star formation survey: Project overview with analysis of dense gas structure and kinematics in Barnard 1', Astrophysical Journal, vol. 794, no. 2, 165. https://doi.org/10.1088/0004-637X/794/2/165
Storm, Shaye ; Mundy, Lee G. ; Fernández-López, Manuel ; Lee, Katherine I. ; Looney, Leslie W. ; Teuben, Peter ; Rosolowsky, Erik ; Arce, Héctor G. ; Ostriker, Eve C. ; Segura-Cox, Dominique M. ; Pound, Marc W. ; Salter, Demerese M. ; Volgenau, Nikolaus H. ; Shirley, Yancy L ; Chen, Che Yu ; Gong, Hao ; Plunkett, Adele L. ; Tobin, John J. ; Kwon, Woojin ; Isella, Andrea ; Kauffmann, Jens ; Tassis, Konstantinos ; Crutcher, Richard M. ; Gammie, Charles F. ; Testi, Leonardo. / CARMA large area star formation survey : Project overview with analysis of dense gas structure and kinematics in Barnard 1. In: Astrophysical Journal. 2014 ; Vol. 794, No. 2.
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