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ASTRONOMY BROWN BAG SEMINAR TIME SERIES ANALYSIS OF HR 1040 SEPTEMBER 16, 2008 DAVID CORLISS

ASTRONOMY BROWN BAG SEMINAR TIME SERIES ANALYSIS OF HR 1040 SEPTEMBER 16, 2008 DAVID CORLISS. www.wikisky.org. ROCKET SCIENCE. OUTLINE. HR 1040. OBSERVATIONAL METHODOLOGY. CHALLENGES. www.wikisky.org. TIME SERIES STUDY. FUTURE RESEARCH. HR 1040 – Basic Data. Class: A0 Ia

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ASTRONOMY BROWN BAG SEMINAR TIME SERIES ANALYSIS OF HR 1040 SEPTEMBER 16, 2008 DAVID CORLISS

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  1. ASTRONOMY BROWN BAG SEMINARTIME SERIES ANALYSISOF HR 1040SEPTEMBER 16, 2008DAVID CORLISS www.wikisky.org

  2. ROCKET SCIENCE OUTLINE HR 1040 OBSERVATIONAL METHODOLOGY CHALLENGES www.wikisky.org TIME SERIES STUDY FUTURE RESEARCH

  3. HR 1040 – Basic Data Class: A0 Ia Distance: 758 ± 250 pc mv: 4.54, Mv: -7.1 (Variable ± 0.3) Teff: 9730 ± 300 K Mass: 19.3 ± 3.3 Mסּ Radius: 97 ± 2.4 Rסּ Terminal Velocity: 218 ± 44 kms-1 Escape Velocity: 233 ± 47 kms-1 Mass Loss: 8.5 ± 3 x 10-8 Mסּyr-1 Features: Irregular Variable, Mass Loss, HVA Events www.wikisky.org

  4. HR 1040 – CAM OB1 ASSOCIATION Straizys, V. & Laugalys, V., 2007, Baltic Astronomy, 16, 167

  5. OBSERVATIONS: METHODOLOGY RITTER OBSERVATORY 1.06 m, f/8 Ritchey – Chrétien Telescope High-Resolution Échelle Spectrograph CCD Camera (Prior to 2007) 1200 x 800 pixels 22.5 x 22.5 μm cooled to 140 K Resolution ~ 26,000 near Hα

  6. OBSERVATIONS: SPECTRUM A Digital Spectral Classification Atlas, R. O. Gray, ASU

  7. OBSERVATIONS: Hα PROFILEP Cygni Mass Loss Hα Region of P Cygni, N. Richardson, M.S. Thesis, 2006

  8. OBSERVATIONS: Hα Profile in HR 1040 Hα Region of HR 1040, N. D. Morrison, 1993

  9. OBSERVATIONS: High Velocity Absorption in HR 1040 C. L. Mulliss, 1993

  10. OBSERVATIONS: High Velocity Absorption in HR 1040 N. D. Morrison, 1993

  11. CHALLENGES Telluric Water Vapor Hα Region of Deneb, N. Richardson, M.S. Thesis, 2006

  12. I STUDY Β ORIONIS REALLY! I STUDY HR 1040 CHALLENGES Sparse and intermittent data Large Distance Contributes to Uncertainties Complex Hα Profile Northern Declination - Observations can be limited

  13. TIME SERIES ANALYSIS: PERIODICITY Strömgren Photometry of Deneb in Fall 1999, N. Richardson, M.S. Thesis, 2006

  14. TIME SERIES ANALYSIS: FORECASTING

  15. TIME SERIES ANALYSIS: CHAOS When change makes all the difference!

  16. TIME SERIES ANALYSIS: ARIMA MODELS 0,1,1 ARIMA MODELCHAOTIC DATA 1,1,0 ARIMA MODELSMOOTH DATA

  17. TIME SERIES ANALYSIS: CHANGES IN CHEMISTRY Hα Region of Deneb, N. Richardson, M.S. Thesis, 2006

  18. FUTURE RESEARCH Opportunities for further research include: New Objects New mathematical Techniques Longer Time Series Chemical Composition

  19. CONCLUSIONS HR 1040 is an A0 Ia Supergiant Variable P Cygni Hα profile indicates the presence of mass loss; Rate of loss is 8.5 ± 3 x 10-8 Mסּyr-1 High Velocity Absorption events are observed and appear to be associated with variations in luminosity HVA events may be periodic but this can not be verified with the data presently available – more observations over longer time periods are needed Standard statistical techniques for Time Series Analysis such as ARIMA Models may be useful in understanding the behavior of HR 1040

  20. REFERENCES Bright Star Catalog, Fifth Edition, 1991 (19950214) Corliss, D. J., 2008, UT Graduate Research Symposium Fischer, W. J. & Morrison, N. D., 2001, PASP, 113, 821 Richardson, N., A Five–Year Spectroscopic and Photometric Campaign on the Supergiant Star Deneb, M.S. Thesis, 2006 Kaufer et al. 1996, A&A, 305, 887 Kunasz, P. B., Morrison, N. D., Spressart, B. 1983, ApJ, 266, 739 Morrison, N. D., & Gordon, K. D., 1996, Bull. AAS, 27, 1312 Przybilla, N. et al., 2004, Proceedings IAU Symposium No. 224, DOI: 10.1017/S174392130400482X Rosendhal, J., D., 1973, ApJ, 186, 909 Stahl et al. 1995, Jour. Astr. Data 1, No. 3 Straizys, V, & Laugalys, V, 2007, Baltic Astronomy, 16, 167 Talavera, A. & Gomez de Castro, A. I., 1987, AA,181, 300T

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