The molecular gas mass of M 33

Molecular and atomic gas in the Local Group galaxy M 33

We present high resolution large scale observations of the molecular and atomic gas in the Local Group Galaxy M33. The observations were carried out using the HEterodyne Receiver Array (HERA) at the 30m IRAM telescope in the CO(2–1) line achieving a resolution of 12×2.6 km s−1, enabling individual Giant Molecular Clouds (GMCs) to be resolved. The observed region is 650 square arcminutes mainly ...

O-33: Serum Anti-M

Astronomy & Astrophysics Dust and gas power spectrum in M 33 ( HERM 33 ES )

Power spectra of deprojected images of late-type galaxies in gas or dust emission are very useful diagnostics of the dynamics and stability of their interstellar medium. Previous studies have shown that the power spectra can be approximated as two power laws, a shallow one on large scales (larger than 500 pc) and a steeper one on small scales, with the break between the two corresponding to the...

Molecular gas in the galaxy M 83 ⋆ II . Kinematics of the molecular gas

We present the kinematics of the molecular gas in the barred spiral galaxy M83 (NGC5236). The study is based on CO(J=1–0 and 2–1) observations with the Swedish-ESO Submillimetre Telescope (SEST). Iso-velocity maps of the entire optical disk, 10 × 10 or 13× 13 kpc, are produced. They show the pattern of an inclined, rotating disk, but also the effects of streaming motions along the spiral arms. ...

Molecular gas in the galaxy M 83 I . The molecular gas distribution

We present CO J=1–0 and J=2–1 Swedish-ESO Submillimetre Telescope (SEST) observations of the barred spiral galaxy M83 (NGC5236). The size of the CO maps is 10×10 and they cover the entire optical disk. The grid spacing is 11 for CO(J=1–0) and 11 or 7 for CO(J=2–1) depending on the position in the galaxy. In total we have obtained spectra in 1900 and 2574 positions in the CO(J=1–0) and CO(J=2–1)...