The green bank Ammonia survey: Dense cores under pressure in Orion A

Helen Kirk; Rachel K. Friesen; Jaime E. Pineda; Erik Rosolowsky; Stella S.R. Offner; Christopher D. Matzner; Philip C. Myers; James Di Francesco; Paola Caselli; Felipe O. Alves; Ana Chacón-Tanarro; How Huan Chen; Michael Chun Yuan Chen; Jared Keown; Anna Punanova; Young Min Seo; Yancy Shirley; Adam Ginsburg; Christine Hall; Ayushi Singh; Héctor G. Arce; Alyssa A. Goodman; Peter Martin; Elena Redaelli

The green bank Ammonia survey: Dense cores under pressure in Orion A

Helen Kirk, Rachel K. Friesen, Jaime E. Pineda, Erik Rosolowsky, Stella S.R. Offner, Christopher D. Matzner, Philip C. Myers, James Di Francesco, Paola Caselli, Felipe O. Alves, Ana Chacón-Tanarro, How Huan Chen, Michael Chun Yuan Chen, Jared Keown, Anna Punanova, Young Min Seo, Yancy Shirley, Adam Ginsburg, Christine Hall, Ayushi SinghHéctor G. Arce, Alyssa A. Goodman, Peter Martin, Elena Redaelli

Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A molecular cloud. Surprisingly, we find that almost none of the dense cores are sufficiently massive to be bound when considering only the balance between self-gravity and the thermal and non-thermal motions present in the dense gas. Including the additional pressure binding imposed by the weight of the ambient molecular cloud material and additional smaller pressure terms, however, suggests that most of the dense cores are pressure confined.

Original language	English (US)
Journal	Unknown Journal
State	Published - Aug 17 2017

ASJC Scopus subject areas

General

Fingerprint Dive into the research topics of 'The green bank Ammonia survey: Dense cores under pressure in Orion A'. Together they form a unique fingerprint.

Cite this

Kirk, H., Friesen, R. K., Pineda, J. E., Rosolowsky, E., Offner, S. S. R., Matzner, C. D., Myers, P. C., Francesco, J. D., Caselli, P., Alves, F. O., Chacón-Tanarro, A., Chen, H. H., Chen, M. C. Y., Keown, J., Punanova, A., Seo, Y. M., Shirley, Y., Ginsburg, A., Hall, C., ... Redaelli, E. (2017). The green bank Ammonia survey: Dense cores under pressure in Orion A. Unknown Journal.

The green bank Ammonia survey : Dense cores under pressure in Orion A. / Kirk, Helen; Friesen, Rachel K.; Pineda, Jaime E.; Rosolowsky, Erik; Offner, Stella S.R.; Matzner, Christopher D.; Myers, Philip C.; Francesco, James Di; Caselli, Paola; Alves, Felipe O.; Chacón-Tanarro, Ana; Chen, How Huan; Chen, Michael Chun Yuan; Keown, Jared; Punanova, Anna; Seo, Young Min; Shirley, Yancy; Ginsburg, Adam; Hall, Christine; Singh, Ayushi; Arce, Héctor G.; Goodman, Alyssa A.; Martin, Peter; Redaelli, Elena.

In: Unknown Journal, 17.08.2017.

Research output: Contribution to journal › Article › peer-review

Kirk, H, Friesen, RK, Pineda, JE, Rosolowsky, E, Offner, SSR, Matzner, CD, Myers, PC, Francesco, JD, Caselli, P, Alves, FO, Chacón-Tanarro, A, Chen, HH, Chen, MCY, Keown, J, Punanova, A, Seo, YM, Shirley, Y, Ginsburg, A, Hall, C, Singh, A, Arce, HG, Goodman, AA, Martin, P & Redaelli, E 2017, 'The green bank Ammonia survey: Dense cores under pressure in Orion A', Unknown Journal.

Kirk, Helen ; Friesen, Rachel K. ; Pineda, Jaime E. ; Rosolowsky, Erik ; Offner, Stella S.R. ; Matzner, Christopher D. ; Myers, Philip C. ; Francesco, James Di ; Caselli, Paola ; Alves, Felipe O. ; Chacón-Tanarro, Ana ; Chen, How Huan ; Chen, Michael Chun Yuan ; Keown, Jared ; Punanova, Anna ; Seo, Young Min ; Shirley, Yancy ; Ginsburg, Adam ; Hall, Christine ; Singh, Ayushi ; Arce, Héctor G. ; Goodman, Alyssa A. ; Martin, Peter ; Redaelli, Elena. / The green bank Ammonia survey : Dense cores under pressure in Orion A. In: Unknown Journal. 2017.

@article{b6522a5dba5b461a8dfc8b8a5944da01,

title = "The green bank Ammonia survey: Dense cores under pressure in Orion A",

abstract = "We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A molecular cloud. Surprisingly, we find that almost none of the dense cores are sufficiently massive to be bound when considering only the balance between self-gravity and the thermal and non-thermal motions present in the dense gas. Including the additional pressure binding imposed by the weight of the ambient molecular cloud material and additional smaller pressure terms, however, suggests that most of the dense cores are pressure confined.",

author = "Helen Kirk and Friesen, {Rachel K.} and Pineda, {Jaime E.} and Erik Rosolowsky and Offner, {Stella S.R.} and Matzner, {Christopher D.} and Myers, {Philip C.} and Francesco, {James Di} and Paola Caselli and Alves, {Felipe O.} and Ana Chac{\'o}n-Tanarro and Chen, {How Huan} and Chen, {Michael Chun Yuan} and Jared Keown and Anna Punanova and Seo, {Young Min} and Yancy Shirley and Adam Ginsburg and Christine Hall and Ayushi Singh and Arce, {H{\'e}ctor G.} and Goodman, {Alyssa A.} and Peter Martin and Elena Redaelli",

year = "2017",

month = aug,

day = "17",

language = "English (US)",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - The green bank Ammonia survey

T2 - Dense cores under pressure in Orion A

AU - Kirk, Helen

AU - Friesen, Rachel K.

AU - Pineda, Jaime E.

AU - Rosolowsky, Erik

AU - Offner, Stella S.R.

AU - Matzner, Christopher D.

AU - Myers, Philip C.

AU - Francesco, James Di

AU - Caselli, Paola

AU - Alves, Felipe O.

AU - Chacón-Tanarro, Ana

AU - Chen, How Huan

AU - Chen, Michael Chun Yuan

AU - Keown, Jared

AU - Punanova, Anna

AU - Seo, Young Min

AU - Shirley, Yancy

AU - Ginsburg, Adam

AU - Hall, Christine

AU - Singh, Ayushi

AU - Arce, Héctor G.

AU - Goodman, Alyssa A.

AU - Martin, Peter

AU - Redaelli, Elena

PY - 2017/8/17

Y1 - 2017/8/17

N2 - We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A molecular cloud. Surprisingly, we find that almost none of the dense cores are sufficiently massive to be bound when considering only the balance between self-gravity and the thermal and non-thermal motions present in the dense gas. Including the additional pressure binding imposed by the weight of the ambient molecular cloud material and additional smaller pressure terms, however, suggests that most of the dense cores are pressure confined.

AB - We use gas temperature and velocity dispersion data from the Green Bank Ammonia Survey and core masses and sizes from the James Clerk Maxwell Telescope Gould Belt Survey to estimate the virial states of dense cores within the Orion A molecular cloud. Surprisingly, we find that almost none of the dense cores are sufficiently massive to be bound when considering only the balance between self-gravity and the thermal and non-thermal motions present in the dense gas. Including the additional pressure binding imposed by the weight of the ambient molecular cloud material and additional smaller pressure terms, however, suggests that most of the dense cores are pressure confined.

UR - http://www.scopus.com/inward/record.url?scp=85095029348&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85095029348&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85095029348

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -