X-ray and Infrared Diagnostics of Star Formation and Black Hole Accretion in Galaxies
Abstract (Summary)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
CHAPTER 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CHAPTER 2 MISSING MASSIVE STARS IN STARBURSTS: STELLAR TEMPERA-
TURE DIAGNOSTICS AND THE IMF . . . . . . . . . . . . . . . . . . . . . . 19
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.2 Observations, Data Reduction, and Calibration . . . . . . . . . . . . 22
2.2.1 Data Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.2.2 Combining Spectra . . . . . . . . . . . . . . . . . . . . . . . . 26
2.2.3 Subtracting the Stellar Continuum . . . . . . . . . . . . . . . 27
2.2.4 Measuring Line Ratios . . . . . . . . . . . . . . . . . . . . . . 28
2.3 Modelling Line Ratio Behavior . . . . . . . . . . . . . . . . . . . . . 31
2.3.1 Models Using Individual Stars . . . . . . . . . . . . . . . . . 34
2.3.2 Spectral Synthesis Models . . . . . . . . . . . . . . . . . . . . 37
2.4 Diagnosics of Stellar Teff In Starburst Galaxies . . . . . . . . . . . . 40
2.4.1 Approaches to Estimating Teff . . . . . . . . . . . . . . . . . 40
2.4.2 Testing He I 2.06 µm/Br? . . . . . . . . . . . . . . . . . . . . 46
2.4.3 Testing Optical Teff Indicators . . . . . . . . . . . . . . . . . 50
2.4.4 Testing the Mid–Infrared Fine Structure Line Ratios . . . . . 55
2.5 Diagnosing Ionizing Conditions in Starburts . . . . . . . . . . . . . 61
2.5.1 Mid–Infrared Line Ratio Dependencies . . . . . . . . . . . . 61
2.5.2 The Spectrum of the Ionizing Radiation . . . . . . . . . . . . 65
2.5.3 Ionizing Conditions in Low Metallicity Starbursts . . . . . . 69
2.5.4 Caveats and Assumptions . . . . . . . . . . . . . . . . . . . . 70
2.5.5 UV and Nebular Diagnostics in Conflict? . . . . . . . . . . . 72
2.6 Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
2.7 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Bibliographical Information:
Advisor:
School:The University of Arizona
School Location:USA - Arizona
Source Type:Master's Thesis
Keywords:
ISBN:
Date of Publication: