q4talk

Slide1 : Spectra of Comet C/2001 Q4 NEAT from Mount Lemmon, AZ Capstone Experience Presentation J Leon Wilde


Slide2 : Spectra of Q4 NEAT The Outline The motivation Why study comets Comet spectra Obtain the data Instrumentation Location The data Measurements Interpretations The Continued Work Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide3 : Why study comets? Pristine material Help to set initial conditions on Solar System “Accessible” space dust What is a comet? Rock and ice “Dirty snowball” Origin from KB or OC Spectra of Q4 NEAT The Motivation Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Ion tail Coma Nucleus Dust tail


Slide4 : What is a comet? Spectra of Q4 NEAT The Motivation Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Copyright 1997 Brad D. Wallis


Slide5 : What is comet spectra? Spectra of Q4 NEAT Examples of comet spectra Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Sitko class notes Sitko et. al.


Slide6 : What is an infrared spectrograph? IR band detector BASS Aerospace Corp.’s Broadband Array Spectrograph System Very cool (4 K) 2.9mm – 13.5mm Spectra of Q4 NEAT Obtaining data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide7 : What is an infrared spectrograph? BASS diagram Resolution l/Dl = 50 Spectra of Q4 NEAT Obtaining data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Hackwell et. al.


Slide8 : Data collection 1.5m reflecting telescope Spectra of Q4 NEAT Obtaining data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide9 : Data collection MAC OS 6: Ancient Technology Log book Spectra of Q4 NEAT Obtaining data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide10 : Data collection Spectra of Q4 NEAT Obtaining data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide11 : Observatory site Mount Lemmon 9000 feet above sea level No stadium lights Arizona Lower % of water vapor in the atmosphere Spectra of Q4 NEAT Location Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide12 : Spectra of Q4 NEAT The data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Blackbody Fit BB Fit: 310 K +- 5K 8.4mm – 12mm Silicate band 10.5mm feature Crystalline enstatite MgSiO3 11.2mm feature Crystalline olivine Fe2SiO4 Mg2SiO4 11.2mm 10.5mm Sitko et. al.


Slide13 : Spectra of Q4 NEAT The data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Ratio BandFlux/Blackbody Emphasizes features in silicate band Sitko et. al.


Slide14 : Spectra of Q4 NEAT The data Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Sitko et. al. 2004


Slide15 : What have we done? Traveled to an ideal location Obtained spectral data of comet C/2001 Q4 NEAT Reduced the data Analyzed Found it to be similar to other comet spectra Identified some structures / compounds Small error bars Good preparation and scientific techniques Luck of the draw Published the work as circular through International Astronomical Union, Circular No. 8342 Spectra of Q4 NEAT The Conclusion Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide16 : Spectra of Q4 NEAT The Continued Work Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde


Slide17 : Who do I have to thank? Big THANKS to: Professor Mike Sitko and his Collaborators, Ray Russell and Daryl Kim Spectra of Q4 NEAT The Thanks Capstone Experience: Spectra of C/2001 Q4 NEAT June 9th, 2004 University of Cincinnati, GeoPhys 300 J Leon Wilde Ray R. Daryl K. Mike S.