2010A&A...518L..37P

Query : 2010A&A...518L..37P

2010A&A...518L..37P - Astronomy and Astrophysics, volume 518, L37-37 (2010/7-2)

Probing the molecular interstellar medium of M82 with Herschel-SPIRE spectroscopy.

PANUZZO P., RANGWALA N., RYKALA A., ISAAK K.G., GLENN J., WILSON C.D., AULD R., BAES M., BARLOW M.J., BENDO G.J., BOCK J.J., BOSELLI A., BRADFORD M., BUAT V., CASTRO-RODRIGUEZ N., CHANIAL P., CHARLOT S., CIESLA L., CLEMENTS D.L., COORAY A., CORMIER D., CORTESE L., DAVIES J.I., DWEK E., EALES S.A., ELBAZ D., FULTON T., GALAMETZ M., GALLIANO F., GEAR W.K., GOMEZ H.L., GRIFFIN M., HONY S., LEVENSON L.R., LU N., MADDEN S., O'HALLORAN B., OKUMURA K., OLIVER S., PAGE M.J., PAPAGEORGIOU A., PARKIN T.J., PEREZ-FOURNON I., POHLEN M., POLEHAMPTON E.T., RIGBY E.E., ROUSSEL H., SACCHI N., SAUVAGE M., SCHULZ B., SCHIRM M.R.P., SMITH M.W.L., SPINOGLIO L., STEVENS J.A., SRINIVASAN S., SYMEONIDIS M., SWINYARD B., TRICHAS M., VACCARI M., VIGROUX L., WOZNIAK H., WRIGHT G.S. and ZEILINGER W.W.

Abstract (from CDS):

We present the observations of the starburst galaxy M82 taken with the Herschel SPIRE Fourier-transform spectrometer. The spectrum (194-671µm) shows a prominent CO rotational ladder from J=4-3 to 13-12 emitted by the central region of M82. The fundamental properties of the gas are well constrained by the high J lines observed for the first time. Radiative transfer modeling of these high-S/N ¹²CO and ¹³CO lines strongly indicates a very warm molecular gas component at ∼500K and pressure of ∼3x10⁶K/cm3, in good agreement with the H₂ rotational lines measurements from Spitzer and ISO. We suggest that this warm gas is heated by dissipation of turbulence in the interstellar medium (ISM) rather than X-rays or UV flux from the straburst. This paper illustrates the promise of the SPIRE FTS for the study of the ISM of nearby galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: ISM - galaxies: starburst - galaxies: individual: M82 - ISM: molecules - submillimeter: galaxies

Simbad objects: 4

Full paper

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Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	M 81	Sy2	09 55 33.1726556496	+69 03 55.062505368		7.89	6.94		~	4282	3
2	M 82	IG	09 55 52.430	+69 40 46.93	9.61	9.30	8.41		~	5700	6
3	NGC 3077	GiP	10 03 19.0965510921	+68 44 01.556166166	11.23	10.85	10.14	9.74	~	744	0
4	Mrk 231	Sy1	12 56 14.2341182928	+56 52 25.238373852		14.68	13.84		~	1939	3

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