Molecular gas and star formation in local early-type galaxies

M. Bureau; T. A. Davis; K. Alatalo; A. F. Crocker; L. Blitz; L. M. Young; F. Combes; M. Bois; F. Bournaud; M. Cappellari; R. L. Davies; P. T. De Zeeuw; P. A. Duc; E. Emsellem; S. Khochfar; D. Krajnović; H. Kuntschner; P. Y. Lablanche; R. M. McDermid; R. Morganti; T. Naab; T. Oosterloo; M. Sarzi; N. Scott; P. Serra; A. Weijmans

doi:10.1017/S1743921311022459

Molecular gas and star formation in local early-type galaxies

M. Bureau^*, T. A. Davis, K. Alatalo, A. F. Crocker, L. Blitz, L. M. Young, F. Combes, M. Bois, F. Bournaud, M. Cappellari, R. L. Davies, P. T. De Zeeuw, P. A. Duc, E. Emsellem, S. Khochfar, D. Krajnović, H. Kuntschner, P. Y. Lablanche, R. M. McDermid, R. MorgantiT. Naab, T. Oosterloo, M. Sarzi, N. Scott, P. Serra, A. Weijmans

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

Abstract

The molecular gas content of local early-type galaxies is constrained and discussed in relation to their evolution. First, as part of the ATLAS ^3D survey, we present the first complete, large (260 objects), volume-limited single-dish survey of CO in normal local early-type galaxies. We find a surprisingly high detection rate of 22%, independent of luminosity and at best weakly dependent on environment. Second, the extent of the molecular gas is constrained with CO synthesis imaging, and a variety of morphologies is revealed. The kinematics of the molecular gas and stars are often misaligned, implying an external gas origin in over a third of the systems, although this behaviour is drastically diffferent between field and cluster environments. Third, many objects appear to be in the process of forming regular kpc-size decoupled disks, and a star formation sequence can be sketched by piecing together multi-wavelength information on the molecular gas, current star formation, and young stars. Last, early-type galaxies do not seem to systematically obey all our usual prejudices regarding star formation, following the standard Schmidt-Kennicutt law but not the far infrared-radio correlation. This may suggest a greater diversity in star formation processes than observed in disk galaxies. Using multiple molecular tracers, we are thus starting to probe the physical conditions of the cold gas in early-types.

Original language	English
Title of host publication	Tracing the Ancestry of Galaxies (on the Land of our Ancestors)
Subtitle of host publication	Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010
Editors	Claude Carignan, Françoise Combes, Ken C. Freeman
Place of Publication	Cambridge
Publisher	Cambridge University Press (CUP)
Pages	55-58
Number of pages	4
ISBN (Print)	9780521766029
DOIs	https://doi.org/10.1017/S1743921311022459
Publication status	Published - Dec 2010
Externally published	Yes

Publication series

Name	Proceedings of the International Astronomical Union
Number	S277
Volume	6
ISSN (Print)	1743-9213
ISSN (Electronic)	1743-9221

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10.1017/S1743921311022459

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Bureau, M., Davis, T. A., Alatalo, K., Crocker, A. F., Blitz, L., Young, L. M., Combes, F., Bois, M., Bournaud, F., Cappellari, M., Davies, R. L., De Zeeuw, P. T., Duc, P. A., Emsellem, E., Khochfar, S., Krajnović, D., Kuntschner, H., Lablanche, P. Y., McDermid, R. M., ... Weijmans, A. (2010). Molecular gas and star formation in local early-type galaxies. In C. Carignan, F. Combes, & K. C. Freeman (Eds.), Tracing the Ancestry of Galaxies (on the Land of our Ancestors): Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010 (pp. 55-58). (Proceedings of the International Astronomical Union; Vol. 6, No. S277). Cambridge University Press (CUP). https://doi.org/10.1017/S1743921311022459

Bureau, M. ; Davis, T. A. ; Alatalo, K. et al. / Molecular gas and star formation in local early-type galaxies. Tracing the Ancestry of Galaxies (on the Land of our Ancestors): Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010. editor / Claude Carignan ; Françoise Combes ; Ken C. Freeman. Cambridge : Cambridge University Press (CUP), 2010. pp. 55-58 (Proceedings of the International Astronomical Union; S277).

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title = "Molecular gas and star formation in local early-type galaxies",

abstract = "The molecular gas content of local early-type galaxies is constrained and discussed in relation to their evolution. First, as part of the ATLAS 3D survey, we present the first complete, large (260 objects), volume-limited single-dish survey of CO in normal local early-type galaxies. We find a surprisingly high detection rate of 22%, independent of luminosity and at best weakly dependent on environment. Second, the extent of the molecular gas is constrained with CO synthesis imaging, and a variety of morphologies is revealed. The kinematics of the molecular gas and stars are often misaligned, implying an external gas origin in over a third of the systems, although this behaviour is drastically diffferent between field and cluster environments. Third, many objects appear to be in the process of forming regular kpc-size decoupled disks, and a star formation sequence can be sketched by piecing together multi-wavelength information on the molecular gas, current star formation, and young stars. Last, early-type galaxies do not seem to systematically obey all our usual prejudices regarding star formation, following the standard Schmidt-Kennicutt law but not the far infrared-radio correlation. This may suggest a greater diversity in star formation processes than observed in disk galaxies. Using multiple molecular tracers, we are thus starting to probe the physical conditions of the cold gas in early-types.",

author = "M. Bureau and Davis, {T. A.} and K. Alatalo and Crocker, {A. F.} and L. Blitz and Young, {L. M.} and F. Combes and M. Bois and F. Bournaud and M. Cappellari and Davies, {R. L.} and {De Zeeuw}, {P. T.} and Duc, {P. A.} and E. Emsellem and S. Khochfar and D. Krajnovi{\'c} and H. Kuntschner and Lablanche, {P. Y.} and McDermid, {R. M.} and R. Morganti and T. Naab and T. Oosterloo and M. Sarzi and N. Scott and P. Serra and A. Weijmans",

year = "2010",

month = dec,

doi = "10.1017/S1743921311022459",

language = "English",

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series = "Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press (CUP)",

number = "S277",

pages = "55--58",

editor = "Claude Carignan and Fran{\c c}oise Combes and Freeman, {Ken C.}",

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Bureau, M, Davis, TA, Alatalo, K, Crocker, AF, Blitz, L, Young, LM, Combes, F, Bois, M, Bournaud, F, Cappellari, M, Davies, RL, De Zeeuw, PT, Duc, PA, Emsellem, E, Khochfar, S, Krajnović, D, Kuntschner, H, Lablanche, PY, McDermid, RM, Morganti, R, Naab, T, Oosterloo, T, Sarzi, M, Scott, N, Serra, P & Weijmans, A 2010, Molecular gas and star formation in local early-type galaxies. in C Carignan, F Combes & KC Freeman (eds), Tracing the Ancestry of Galaxies (on the Land of our Ancestors): Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010. Proceedings of the International Astronomical Union, no. S277, vol. 6, Cambridge University Press (CUP), Cambridge, pp. 55-58. https://doi.org/10.1017/S1743921311022459

Molecular gas and star formation in local early-type galaxies. / Bureau, M.; Davis, T. A.; Alatalo, K. et al.
Tracing the Ancestry of Galaxies (on the Land of our Ancestors): Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010. ed. / Claude Carignan; Françoise Combes; Ken C. Freeman. Cambridge: Cambridge University Press (CUP), 2010. p. 55-58 (Proceedings of the International Astronomical Union; Vol. 6, No. S277).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution

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AU - Alatalo, K.

AU - Crocker, A. F.

AU - Blitz, L.

AU - Young, L. M.

AU - Combes, F.

AU - Bois, M.

AU - Bournaud, F.

AU - Cappellari, M.

AU - Davies, R. L.

AU - De Zeeuw, P. T.

AU - Duc, P. A.

AU - Emsellem, E.

AU - Khochfar, S.

AU - Krajnović, D.

AU - Kuntschner, H.

AU - Lablanche, P. Y.

AU - McDermid, R. M.

AU - Morganti, R.

AU - Naab, T.

AU - Oosterloo, T.

AU - Sarzi, M.

AU - Scott, N.

AU - Serra, P.

AU - Weijmans, A.

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AB - The molecular gas content of local early-type galaxies is constrained and discussed in relation to their evolution. First, as part of the ATLAS 3D survey, we present the first complete, large (260 objects), volume-limited single-dish survey of CO in normal local early-type galaxies. We find a surprisingly high detection rate of 22%, independent of luminosity and at best weakly dependent on environment. Second, the extent of the molecular gas is constrained with CO synthesis imaging, and a variety of morphologies is revealed. The kinematics of the molecular gas and stars are often misaligned, implying an external gas origin in over a third of the systems, although this behaviour is drastically diffferent between field and cluster environments. Third, many objects appear to be in the process of forming regular kpc-size decoupled disks, and a star formation sequence can be sketched by piecing together multi-wavelength information on the molecular gas, current star formation, and young stars. Last, early-type galaxies do not seem to systematically obey all our usual prejudices regarding star formation, following the standard Schmidt-Kennicutt law but not the far infrared-radio correlation. This may suggest a greater diversity in star formation processes than observed in disk galaxies. Using multiple molecular tracers, we are thus starting to probe the physical conditions of the cold gas in early-types.

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DO - 10.1017/S1743921311022459

M3 - Conference proceeding contribution

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SN - 9780521766029

T3 - Proceedings of the International Astronomical Union

SP - 55

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BT - Tracing the Ancestry of Galaxies (on the Land of our Ancestors)

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Bureau M, Davis TA, Alatalo K, Crocker AF, Blitz L, Young LM et al. Molecular gas and star formation in local early-type galaxies. In Carignan C, Combes F, Freeman KC, editors, Tracing the Ancestry of Galaxies (on the Land of our Ancestors): Proceedings of the 277th Symposium of the International Astronomial Union Held in Ouagaougou, Burkina Faso, December 13-17, 2010. Cambridge: Cambridge University Press (CUP). 2010. p. 55-58. (Proceedings of the International Astronomical Union; S277). doi: 10.1017/S1743921311022459

Molecular gas and star formation in local early-type galaxies

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