Details

Autor(en) / Beteiligte

• Schirm, Maximilien R P
• Wilson, Christine D
• Parkin, Tara J
• Kamenetzky, Julia
• Glenn, Jason
• Rangwala, Naseem
• SPINOGLIO, LUIGI
• Pereira-Santaella, Miguel
• Baes, Maarten
• Barlow, Michael J

Titel

HERSCHEL -SPIRE FOURIER TRANSFORM SPECTROMETER OBSERVATIONS OF EXCITED CO AND [C I] IN THE ANTENNAE (NGC 4038/39): WARM AND COLD MOLECULAR GAS

Ist Teil von

• The Astrophysical journal, 2014-02, Vol.781 (2), p.1-24

Ort / Verlag

United States

Erscheinungsjahr

2014

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We present Herschel Spectral and Photometric Imaging Receiver (SPIRE) Fourier Transform Spectrometer (FTS) observations of the Antennae (NGC 4038/39), a well-studied, nearby (22Mpc), ongoing merger between two gas-rich spiral galaxies. We detect five CO transitions (J = 4-3 to J = 8-7), both [CI] transitions, and the [NII] 205 mu m transition across the entire system, which we supplement with ground-based observations of the CO J = 1-0, J = 2-1, and J = 3-2 transitions and Herschel Photodetecting Array Camera and Spectrometer (PACS) observations of [CII] and [OI] 63 mu m. We find that there are two components to the molecular gas: a cold (T sub(kin) ~ 10-30 K) and a warm (T sub(kin) > 100 K) component. Finally, we find that a combination of turbulent heating, due to the ongoing merger, and supernova and stellar winds are sufficient to heat the molecular gas.