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Malcolm's Pioneering Astrochemical Legacy: From Radio Astronomy to Interstellar Chemistry

Explore the groundbreaking work of Malcolm from 1941–2017, beginning with his seminal papers in radio astronomy, including observations using the Stockert 25m telescope and Effelsberg. His significant contributions to astrochemistry, CRRL, NH3, TMC-1, and molecular lines are highlighted. Collaborators like Ed Salas, Olano, Walmsley, and Wilson feature prominently in his research, with key discoveries like the "Ammonia Peak" and "Cyanopolyene Peak." Malcolm's legacy lives on through his work on OH, CH3OH masers, and hot cores. His long-term collaborations and theoretical studies continue to shape our understanding of the high-z Universe. This tribute recognizes Malcolm's exceptional scientific impact and his lasting influence on star formation and the interstellar medium.

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Malcolm's Pioneering Astrochemical Legacy: From Radio Astronomy to Interstellar Chemistry

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  1. Malcolm 1941–2017

  2. Beginnings

  3. First paper

  4. First radio astronomy paper

  5. Stockert 25m (18‘ FWHM) First observational radio astronomy paper

  6. First Effelsberg & first molecular line paper

  7. CI/CII regions First astrochemistry paper

  8. Evelyne

  9. 25 years after his first CRRL work Ed

  10. Salas+ 2017

  11. TMC-1 First NH3 paper First ever TMC-1 paper

  12. Olano, Walmsley, & Wilson 1988 TMC-1 “Ammonia Peak” “Cyanopolyyene Peak” Churchwell, Winnewisser, & Walmsley 1978

  13. !!!

  14. Phil

  15. (1984) April 1983

  16. First OH paper

  17. Hydroxyl maser emission and absorption: Baudry, Guilloteau, Walmsley, Wilson, Winnberg, …

  18. no overlap local overlap local and non-local overlap

  19. First CH3OH maser paper

  20. 30 y (!) after first methanol maser paper

  21. October 1985

  22. Hot NH3, hot OH and hot CH3OH are all found in hot cores Friedrich

  23. Henrik

  24. Longterm Collaborations Peter

  25. FeO 54 J=5–4 153.135 GHz Line 10  weaker than old 3 upper limit!

  26. Arcetri: Gruppo Radioastronomia

  27. Riccardo Cesaroni+ 2014

  28. Major work by Caselli, Tafalla, Walmsley et al: • Deuteration • Ionization fraction • … Mario/Paola

  29. In between: Theoretical studies

  30. The high z Universe Roberto

  31. In between: 2001/2002: Back at the MPIfR Thanks a whole lot, Malcom!

  32. Editor Supreme Steve

  33. Malcolmmade numerous fundamental contributions to the physics and chemistry of star formation and the interstellar medium. He was an exceptional scientist, a highly esteemed colleague and a true gentleman and friend.

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