Submillimeter-wave and far-infrared spectroscopy of high-J transitions of ammonia S. Yu , J.C. Pearson, B.J. Drouin and K. Sung Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 O. Pirali, M. Vervloet and M.-A. Martin Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, France C.P. Endres I. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany T. Shiraishi, K. Kobayashi and F. Matsushima Department of Physics, University of Toyama, Gofuku, Toyama 930-8555, Japan Copyright 2010 California Institute of Technology. Government sponsorship acknowledged.
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Submillimeter-wave and far-infrared spectroscopy of high-J transitions of ammonia S. Yu, J.C. Pearson, B.J. Drouin and K. Sung Jet Propulsion Laboratory,
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Submillimeter-wave and far-infrared spectroscopy of high-J transitions of ammonia
S. Yu, J.C. Pearson, B.J. Drouin and K. Sung
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
O. Pirali, M. Vervloet and M.-A. Martin
Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, FranceC.P. Endres
I. Physikalisches Institut, Universität zu Köln, 50937 Köln, GermanyT. Shiraishi, K. Kobayashi and F. Matsushima
Department of Physics, University of Toyama, Gofuku, Toyama 930-8555, Japan
Copyright 2010 California Institute of Technology. Government sponsorship acknowledged.
Hot ammonia in space
Shanshan Yu Hot ammonia
•Observed at J=18 (E = 3130 K) toward Sgr B2 (Wilson 2006)
•Expected to exist to larger QN’s in many exoplanets and brown dwarfs
K=3 Herman-Wallis terms not included in intensity calculations
0(s)-0(s)
Status on 22/4
• 6174 transitions constructed (1864 from this work), J<16• RMS = 4
Shanshan Yu Hot ammonia
1;2 lK
1 lK
0;3 lK
1;4 lK
2 lK
2;1 lK
2;4 lK2;8 lK
0
500
1000
1500
2000
>>
5
4
l = -1 or 1
4
2
2
gs
E = 35.69
sa
a
s
sa
a
s
E = 0.79
E = 284.70E = 1.10
cm-1
l = 0s
10
32
7 l=-16 l=1
9 l=-18 l=1
3)( lK
6)( lK
0)( lK
Pearson et al., OSU, RC02 (Thursday, 8:46 am)
Shanshan Yu Hot ammonia
Acknowledgements
Shanshan Yu Hot ammonia
• Dr. L. Brown
• Dr. I. Kleiner
• D. Balcon and the AILES beamline staff
• NASA Astrophysics Research and Analysis Program (APRA)
Herschel-HIFI (Heterodyne Instrument for the Far-IR) ESA and NASA joint mission Launch: 2009 (3 years lifetime) Telescope: 3.5 meter diameter, <100 K temperature The only space facility dedicated to the terahertz part of the spectrum Spectral coverage: 151–212 μm (1910–1410 GHz); 240–625 μm (1250–480 GHz) Objectives: life cycle of gas and dust
New terahertz telescopes (I)
SOFIA (Stratospheric Observatory For Infrared Astronomy ) NASA and DLR, German Aerospace Center joint mission
Operation: 2010 (20 years lifetime)
The largest airborne observatory in the world
Telescope: 2.5 meter diameter, 240 K temperature
Spectral coverage: 1–700 μm (300000–430 GHz)
Objectives: identification of complex molecules in space, star birth and death etc.
New terahertz telescopes (II)
New terahertz telescopes (III)
ALMA (Atacama Large Millimeter/Submillimeter Array)
Global collaboration mission: East Asia, Europe, and North America
Location: Chile, 5000 meters above sea level
Operation: 2012 (50 years lifetime)
Telescope: a system up to 66 high-precision dish antennas