SOME ASPECTS OF GISBERT’S CAREER Eric Herbst The Ohio State University.
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Transcript of SOME ASPECTS OF GISBERT’S CAREER Eric Herbst The Ohio State University.
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SOME ASPECTS OF GISBERT’S CAREER
Eric Herbst
The Ohio State University
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Curriculum Vitae• 1936 Birth (Karlsruhe, Germany) • 1967 Ph. D. (Duke Univ., spectrum of HSSH)• 1967-68 Postdoc, Duke Univ.• 1968-70 Postdoc, NRC (with Costain/Oka)• 1970-71 Asst. Prof., Univ. Brit. Columbia• 1971-72 Visiting Scientist, NRC• 1972-79 Astronomer, MPIfR • 1979- Chair in Physics, Univ. of Koeln• Honors: Max-Planck Research Prize; Phillip • Morris Prize; Marci-Medal; Historic Medal • of Charles University
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I. Physikalisches Institut, Koeln
• Size: 100 people (students, researchers, machinists, etc.)
• PhD’s granted: 100• Yearly funds: 8 000 000 euros• Construction of astronomical
hardware for a variety of
telescopes in-house
(KOSMA, SWAS, HIFI, SOFIA)
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SOME CAREER HIGHLIGHTS
• ASTRONOMY
• 1) New species & isotopes
• 2) Maps & physical conditions (e.g. CI & CO)
• 3) Cologne telescope
• 4) Development (e.g. AOS’s)
• SPECTROSCOPY
• 1) mm/submm studies including intracavity work
• 2) THz studies
• 3) IR studies
• 4) Database
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SOME SPECTROSCOPIC EQUIPMENT
• THz spectrometers (BWO sources up to 3 THz, sideband source 1.6-2.1 THz; used for study of rotation, torsion, bending vibrations of radicals and normal species)
• OROTRON intracavity mm-wave spectrometer; up to 400 GHz; 3 orders of magnitude enhancement in sensitivity (van der Waals species, etc)
---------------------------------------------------- frequency-stabilized ring laser for IR work
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The Russian Connection
• BWO’s supplied by ISTOK Research and Production Company (Fryazino, Moscow Region)
• Tunable millimeter-wave synthesizers supplied by Institute of Electronic Measurement, KVARZ, Nizhnii Novgorod
• Orotron – Russian Academy of Sciences
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HSSH AND BRETHREN
HSSH HSOH HOOH
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And another look…..
The middle species, HSOH, took many years to learn how to produce!
Winnewisser et al. (2003)
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HSSH (disulfane)
G. Winnewisser, PhD thesis (1967)
c-type transitions
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Some Unusual Aspects of HSSH
• Nearly perfect accidental symmetric top
• Ortho-para structure
• Internal rotation over 4 radians
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Rotational-Torsional Levels
2037
cm
2843
cm
-1 -1
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Note: ortho-para intensity variation!
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HSOH rQ0-BRANCH (2003)
Winnewisser et al. (2003)
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trans-Ethyl Methyl Ether
U. Fuchs et al. (2003)
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Rotational Spectra of Radicals
Some examples of recent years:
CH2 NH NH2 PH PS CP CF CN
Plus the ion HCS+ through 1 THz
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interstellar
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CH2
Michael et al. (2003)
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Low Frequency Bending of C3
Sideband spectrometer
Also infrared studies – see G. Fuchs (2003)
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Giesen et al. (2001)
KAO
Confirmed by ISO
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NEW INTERSTELLAR MOLECULES
• HNC **(lab;1976)• Vinyl cyanide (1975;
Sgr B2)• Formic acid HCOOH
(1975; Sgr B2)• CH3CCCCH (1984:
TMC-1)• NH2D (1985; 3
clouds)
• Three 13C isotopomers of HCCCN (1975,1977; Sgr B2,fractionation),
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TMC-1
In 1978, Churchwell, Winnewisser, and Walmsley put TMC-1 on the map (despite thunderstorm; pointing errors)
“Molecular Observations of a Possible Proto-Solar Nebula in a Dark Cloud in Taurus”
In the following, we will refer to this small cloud as the Taurus Molecular Cloud 1, or TMC1…….
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TMC-1 CP
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Kölner Observatorium für Submm-Astronomie
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HISTORY OF KOSMA
• 1984 KOSMA 3-m first light
• 1985 move to Gornergrat
• 1995 new dish and mount
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SELECTED KOSMA CO and CI STUDIES
• 2003: Virgo cluster spiral galaxies• 2002: CI emission from star-forming regions (1-0 & 2-1)• 2000: Cepheus B cloud • 2000: high latitude cloud MBM 32 • 2000: galactic 5kpc ring • 1998: Rosette molecular complex • 1998: Comet Hyakutake• 1991: fragmentation in California nebulae• 1991: L1495 survey• 1990: nearest cloud (L1457): fragmentation
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Latest CO and C I Studies(The New Generation)
• New array receiver: 2 X 4 pixel 490/810 GHz (SMART) (Graf et al.)
• C I: ability to study 1-0 (492 GHz) and 2-1 (809 GHz) fine-structure lines simultaneously
• CO J=7-6
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Non-Kosma C I studies
• Heinrich-Hertz telescope: 1997– Study of starburst galaxy M82 using 1-0 and 2-
1 simultaneously
• Antarctic Submillimeter Telescope & Remote Observatory: 1997– Study of cold, low density clouds towards the
galactic center broad-line emission
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Some Recent Observations
• Excited HCN in the protoplanetary nebula CRL 618 (2003) with MPIfR (Bonn); deduction of physical conditions
• Unusual isomers of CO in Rho Ophiuchi (e.g. 13C17O) based on precise laboratory data (2001-2003)
• SWAS
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PRESENT & FUTURE WORK
• SPECTROSCOPY– IR studies of carbon clusters (C8)
– Mm-wave studies of van der Waals species
– Free radicals at THz frequencies (CH2)
– Molecular ions
• ASTRONOMY– SOFIA & HERSCHEL (HIFI)
– Database for THz astronomy (CDMS)
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DEAR GISBERT,
Best wishes for the future, and thank you for all of the happy and exciting times we have spent and will continue to spend together.