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The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 The Galactic Center: Molecular Line Mapping.

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Presentation on theme: "The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 The Galactic Center: Molecular Line Mapping."— Presentation transcript:

1 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers A. Weiss (MPIfR), C. Henkel (MPIfR), L. Staveley-Smith (ATNF) Jürgen Ott (NRAO/Caltech) Christian Henkel (MPIfR), Michael Burton (UNSW), Axel Weiss (MPIfR), Lister Staveley-Smith (UWA), Alberto Bolatto (U Maryland), Paul Jones (UNSW) [ ]

2 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Galactic Center Ammonia Survey Galactic Center: rich in molecular gas and star formation most nearby core of a galaxy very different environments extreme physical forces: shear, magnetic fields, tidal forces

3 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Gas & Dust MSX: A-band (8m) red, E-band (21m) blue Spitzer: multiple IRAC bands 1cm continuum on 850 m SCUBA map

4 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Galactic Center Molecular Line Surveys ATCA high resolution interferometric imaging of ammonia in the Galactic Center (PI: J. Ott) resolution: ~27” = 1 pc, ( D l, D b)=(1, 0.2) degree 1cm Mopra GHz spectral line survey (PI: J. Ott) resolution: ~2.4’ = 6pc, ( D l, D b)=(3.5, 1.1) degree 3mm Mopra GHz line survey (PI: M. Burton) resolution: ~40” = 1.6pc, ( D l, D b)=(1.1, 0.4) degree CARMA HCN/N 2 H + mapping resolution: ~5” = 0.2pc, ( D l, D b)=(0.4, 0.15) degree

5 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Ammonia in the Galactic Center Pierce-Price et al. (2001) Sgr A* Sgr B2 (Scuba 850 microns) 0.2 degr pointings, 4min each (total: 150x30pc) NH 3 (1,1) & (2,2) 27” resolution = 1 pc 9/ pc 30 pc

6 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Temperature Structure of the GC Ammonia (1,1) distribution in the Galactic Center Region NH 3 (1,1) peak flux map

7 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Temperature Structure of the GC Kinetic Temperature Map of the GC Blue: ~30 K, green: ~ 50 K, red: > 80K Ammonia (1,1) distribution in the Galactic Center Region

8 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Mass, Velocity, Density, Temperature M: 10 3 … M o P/k: 10 6 …10 9 K cm -2 v: 1…100 km s -1 n H2 : 10 4 …10 7 cm -3 density pressure velocity mass

9 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June mm Mopra survey ~170 lines detected in GHz (3mm range) Jones et al. 2008

10 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June mm Mopra Survey CH 3 CN HC 3 N HCN Jones et al Resolution: ~40” (1.6pc) CARMA 5”

11 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June cm Mopra Survey Sgr A*Sgr B2 NH 3 (1,1) NH 3 (6,6) NH 3 (9,9) 850K above ground state!NH 3 (2,2) NH 3 (3,3)NH 3 (2,1) non-meta-stable lines

12 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June cm Mopra Survey H2OH2O HDO HC 3 N CCS HNCO H2C2NH2C2N

13 The Galactic Center: Molecular Line Mapping with Broadband Spectrometers Jürgen Ott ESO 3D Meeting 11 June 2008 Summary A new generation of very broad-band spectrometers is coming online (e.g., MOPS, Zspectrometer, CABB, WIDAR, ALMA correlator) Huge amount of spectral line data is/will become available Example: Galactic Center: maps of more than 200 lines will be available over at 1-4 degree extent New era in understanding complex chemistry and physics Need for tools to model and understand the data


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