The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. 12CO J = 3→2 observations of NGC 2976 and NGC 3351

Boon Kok Tan; J. Leech; D. Rigopoulou; B. E. Warren; C. D. Wilson; D. Attewell; M. Azimlu; G. J. Bendo; H. M. Butner; E. Brinks; P. Chanial; D. L. Clements; V. Heesen; F. Israel; J. H. Knapen; H. E. Matthews; A. M.J. Mortier; S. Mühle; J. R. Sánchez-Gallego; R. P.J. Tilanus; A. Usero; P. Van der Werf; M. Zhu

doi:10.1093/mnras/stt1625

The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. ¹²CO J = 3→2 observations of NGC 2976 and NGC 3351

Boon Kok Tan, J. Leech, D. Rigopoulou, B. E. Warren, C. D. Wilson, D. Attewell, M. Azimlu, G. J. Bendo, H. M. Butner, E. Brinks, P. Chanial, D. L. Clements, V. Heesen, F. Israel, J. H. Knapen, H. E. Matthews, A. M.J. Mortier, S. Mühle, J. R. Sánchez-Gallego, R. P.J. TilanusA. Usero, P. Van der Werf, M. Zhu

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

8 Scopus citations

Abstract

We present ¹²CO J = 3→2 maps of NGC 2976 and NGC 3351 obtained with the James Clerk Maxwell Telescope (JCMT), both early targets of the JCMT Nearby Galaxy Legacy Survey (NGLS). We combine the present observations with ¹²CO J = 1→0 data and find that the computed ¹²CO J = 3→2 to ¹²CO J = 1→0 line ratio (R31) agrees with values measured in other NGLS field galaxies. We compute the M_H2 value and find that it is robust against the value of R31 used. Using HI data from The HI Nearby Galaxy Survey, we find a tight correlation between the surface density of H₂ and star formation rate density for NGC 3351 when ¹²CO J = 3→2 data are used. Finally, we compare the ¹²CO J = 3→2 intensity with the polycyclic aromatic hydrocarbon (PAH) 8 μm surface brightness and find a good correlation in the high surface brightness regions. We extend this study to include all 25 Spitzer Infrared Nearby Galaxies Survey galaxies within the NGLS sample and find a tight correlation at large spatial scales. We suggest that both PAH 8 μm and ¹²CO J = 3→2 are likely to originate in regions of active star formation.

Original language	English (US)
Pages (from-to)	921-933
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	436
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stt1625
State	Published - Nov 2013
Externally published	Yes

Keywords

Galaxies: ISM
Galaxies: individual: ngc 2976
Galaxies: individual: ngc 3351
Infrared: galaxies
Ism: molecules

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1093/mnras/stt1625

Cite this

Tan, B. K., Leech, J., Rigopoulou, D., Warren, B. E., Wilson, C. D., Attewell, D., Azimlu, M., Bendo, G. J., Butner, H. M., Brinks, E., Chanial, P., Clements, D. L., Heesen, V., Israel, F., Knapen, J. H., Matthews, H. E., Mortier, A. M. J., Mühle, S., Sánchez-Gallego, J. R., ... Zhu, M. (2013). The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. ¹²CO J = 3→2 observations of NGC 2976 and NGC 3351. Monthly Notices of the Royal Astronomical Society, 436(1), 921-933. https://doi.org/10.1093/mnras/stt1625

Tan, BK, Leech, J, Rigopoulou, D, Warren, BE, Wilson, CD, Attewell, D, Azimlu, M, Bendo, GJ, Butner, HM, Brinks, E, Chanial, P, Clements, DL, Heesen, V, Israel, F, Knapen, JH, Matthews, HE, Mortier, AMJ, Mühle, S, Sánchez-Gallego, JR, Tilanus, RPJ, Usero, A, Van der Werf, P & Zhu, M 2013, 'The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. ¹²CO J = 3→2 observations of NGC 2976 and NGC 3351', Monthly Notices of the Royal Astronomical Society, vol. 436, no. 1, pp. 921-933. https://doi.org/10.1093/mnras/stt1625

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title = "The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. 12CO J = 3→2 observations of NGC 2976 and NGC 3351",

abstract = "We present 12CO J = 3→2 maps of NGC 2976 and NGC 3351 obtained with the James Clerk Maxwell Telescope (JCMT), both early targets of the JCMT Nearby Galaxy Legacy Survey (NGLS). We combine the present observations with 12CO J = 1→0 data and find that the computed 12CO J = 3→2 to 12CO J = 1→0 line ratio (R31) agrees with values measured in other NGLS field galaxies. We compute the MH2 value and find that it is robust against the value of R31 used. Using HI data from The HI Nearby Galaxy Survey, we find a tight correlation between the surface density of H2 and star formation rate density for NGC 3351 when 12CO J = 3→2 data are used. Finally, we compare the 12CO J = 3→2 intensity with the polycyclic aromatic hydrocarbon (PAH) 8 μm surface brightness and find a good correlation in the high surface brightness regions. We extend this study to include all 25 Spitzer Infrared Nearby Galaxies Survey galaxies within the NGLS sample and find a tight correlation at large spatial scales. We suggest that both PAH 8 μm and 12CO J = 3→2 are likely to originate in regions of active star formation.",

keywords = "Galaxies: ISM, Galaxies: individual: ngc 2976, Galaxies: individual: ngc 3351, Infrared: galaxies, Ism: molecules",

author = "Tan, {Boon Kok} and J. Leech and D. Rigopoulou and Warren, {B. E.} and Wilson, {C. D.} and D. Attewell and M. Azimlu and Bendo, {G. J.} and Butner, {H. M.} and E. Brinks and P. Chanial and Clements, {D. L.} and V. Heesen and F. Israel and Knapen, {J. H.} and Matthews, {H. E.} and Mortier, {A. M.J.} and S. M{\"u}hle and S{\'a}nchez-Gallego, {J. R.} and Tilanus, {R. P.J.} and A. Usero and {Van der Werf}, P. and M. Zhu",

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T1 - The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey - IX. 12CO J = 3→2 observations of NGC 2976 and NGC 3351

AU - Tan, Boon Kok

AU - Leech, J.

AU - Rigopoulou, D.

AU - Warren, B. E.

AU - Wilson, C. D.

AU - Attewell, D.

AU - Azimlu, M.

AU - Bendo, G. J.

AU - Butner, H. M.

AU - Brinks, E.

AU - Chanial, P.

AU - Clements, D. L.

AU - Heesen, V.

AU - Israel, F.

AU - Knapen, J. H.

AU - Matthews, H. E.

AU - Mortier, A. M.J.

AU - Mühle, S.

AU - Sánchez-Gallego, J. R.

AU - Tilanus, R. P.J.

AU - Usero, A.

AU - Van der Werf, P.

AU - Zhu, M.

PY - 2013/11

Y1 - 2013/11

N2 - We present 12CO J = 3→2 maps of NGC 2976 and NGC 3351 obtained with the James Clerk Maxwell Telescope (JCMT), both early targets of the JCMT Nearby Galaxy Legacy Survey (NGLS). We combine the present observations with 12CO J = 1→0 data and find that the computed 12CO J = 3→2 to 12CO J = 1→0 line ratio (R31) agrees with values measured in other NGLS field galaxies. We compute the MH2 value and find that it is robust against the value of R31 used. Using HI data from The HI Nearby Galaxy Survey, we find a tight correlation between the surface density of H2 and star formation rate density for NGC 3351 when 12CO J = 3→2 data are used. Finally, we compare the 12CO J = 3→2 intensity with the polycyclic aromatic hydrocarbon (PAH) 8 μm surface brightness and find a good correlation in the high surface brightness regions. We extend this study to include all 25 Spitzer Infrared Nearby Galaxies Survey galaxies within the NGLS sample and find a tight correlation at large spatial scales. We suggest that both PAH 8 μm and 12CO J = 3→2 are likely to originate in regions of active star formation.

AB - We present 12CO J = 3→2 maps of NGC 2976 and NGC 3351 obtained with the James Clerk Maxwell Telescope (JCMT), both early targets of the JCMT Nearby Galaxy Legacy Survey (NGLS). We combine the present observations with 12CO J = 1→0 data and find that the computed 12CO J = 3→2 to 12CO J = 1→0 line ratio (R31) agrees with values measured in other NGLS field galaxies. We compute the MH2 value and find that it is robust against the value of R31 used. Using HI data from The HI Nearby Galaxy Survey, we find a tight correlation between the surface density of H2 and star formation rate density for NGC 3351 when 12CO J = 3→2 data are used. Finally, we compare the 12CO J = 3→2 intensity with the polycyclic aromatic hydrocarbon (PAH) 8 μm surface brightness and find a good correlation in the high surface brightness regions. We extend this study to include all 25 Spitzer Infrared Nearby Galaxies Survey galaxies within the NGLS sample and find a tight correlation at large spatial scales. We suggest that both PAH 8 μm and 12CO J = 3→2 are likely to originate in regions of active star formation.

KW - Galaxies: ISM

KW - Galaxies: individual: ngc 2976

KW - Galaxies: individual: ngc 3351

KW - Infrared: galaxies

KW - Ism: molecules

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