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A Panchromatic View of Galaxies

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Describing how to investigate all kinds of galaxies through a multifrequency analysis, this text is divided into three different s... Weiterlesen
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Beschreibung

Describing how to investigate all kinds of galaxies through a multifrequency analysis, this text is divided into three different sections. The first describes the data currently available at different frequencies, from X-rays to UV, optical, infrared and radio millimetric and centimetric, while explaining their physical meaning. In the second section, the author explains how these data can be used to determine physical parameters and quantities, such as mass and temperature. The final section is devoted to describing how the derived quantities can be used in a multifrequency analysis to study such physical processes as the star formation cycle and constrain models of galaxy evolution.
As a result, observers will be able to interpret galaxies and their structure.


Alessandro Boselli is Head of the group Physics of Galaxies at the Laboratoire d'Astrophysique de Marseille, France. He got his academic degree in physics at the Universita di Milano (Italy) and his PhD in astrophysics at the Observatoire de Paris-Meudon (France) under the supervision of J. Lequeux. He then worked at the Max-Planck Institute for Nuclear Physics in Heidelberg (Germany). His research activity is focused on the study of the formation and evolution of galaxies.

Autorentext
Alessandro Boselli is Head of the group Physics of Galaxies at the Laboratoire d'Astrophysique de Marseille, France. He got his academic degree in physics at the Universita di Milano (Italy) and his PhD in astrophysics at the Observatoire de Paris-Meudon (France) under the supervision of J. Lequeux. He then worked at the Max-Planck Institute for Nuclear Physics in Heidelberg (Germany). His research activity is focused on the study of the formation and evolution of galaxies.

Klappentext
A Panchromatic View of Galaxies illustrates how galaxies can be studied through multifrequency analysis. Divided into three different sections, the author first describes the data currently available at different frequencies, from X-rays to UV, optical, infrared and radio, and discusses the different emission processes and the nature of the emitting sources. In the second section, he explains how these data can be used to determine the most important physical, structural and kinematical parameters and quantities necessary for a coherent study of galaxies. The final section describes how these derived quantities can be used in a multifrequency analysis to study the matter cycle that gave birth to galaxies and, at the same time, pose strong observational constraints on models of galaxy formation. This book is thus a useful and practical guide for the interpretation and the use of all kind of multifrequency data in the study of galaxy evolution.

From the Contents:

Part I: Emitting Sources and Radiative Processes in Galaxies

  • X-ray
  • UV-Optical-NIR
  • The Infrared
  • Millimeter and Centimeter Radio

Part II: Derived Quantities

  • Properties of the Hot X-ray Emitting Gas
  • Dust Properties
  • Radio Properties
  • The Spectral Energy Distribution
  • Spectral Features
  • Gas Properties
  • Dust Extinction
  • Star Formation Tracers
  • Light Profi les and Structural Parameters
  • Stellar and Dynamical Masses

Part III: Constraining Galaxy Evolution

  • Statistical Tools
  • Scaling Relations
  • Matter Cycle in Galaxies
  • The Role of the Environment on Galaxy Evolution


Inhalt

Preface XIII

1 Introduction 1

1.1 Galaxies 1

1.2 A Multifrequency Approach 4

1.3 The Purpose of this Book 10

Part One Emitting Sources and Radiative Processes in Galaxies 15

2 X-ray 17

2.1 Continuum 17

2.1.1 Discrete Sources 18

2.1.2 X-ray Emission in Active Galaxies 20

2.1.3 Hot Gas 21

3 UV-Optical-NIR 25

3.1 Continuum: Stellar Emission 26

3.2 Emission Lines 28

3.2.1 Hydrogen Lines 32

3.2.2 Metals 34

3.3 Absorption Lines 35

3.3.1 Hydrogen Lines 37

3.3.2 Other Elements 38

3.4 Molecular Lines 39

3.4.1 H2 Near-Infrared Emission Lines 39

3.4.2 H2 UV Absorption Lines 39

4 The Infrared 41

4.1 Continuum: Dust Emission 42

4.2 Emission Lines 44

4.2.1 PAHs 44

4.2.2 Cooling Lines in PDR 45

4.2.3 H2 Lines 47

4.2.4 Dust Absorption of Ly? Scattered Photons 49

5 Millimeter and Centimeter Radio 51

5.1 Continuum 51

5.1.1 FreeFree Emission 52

5.1.2 Synchrotron Emission 53

5.1.3 Dust Emission 53

5.2 Emission Lines 54

5.2.1 Molecular Lines 54

5.2.2 HI 55

5.3 Absorption Lines 57

5.3.1 HI 57

Part Two Derived Quantities 59

6 Properties of the Hot X-ray Emitting Gas 61

6.1 X-ray Luminosity 61

6.2 Gas Temperature 61

7 Dust Properties 63

7.1 The Far-IR Luminosity 63

7.2 Dust Mass and Temperature 65

8 Radio Properties 71

8.1 Determining the Contribution of the Different Radio Components 71

8.1.1 Synchrotron vs. FreeFree Radio Emission in the Centimeter Domain 71

8.1.2 The Emission of the Cold Dust Component at ? _ 1.5mm 72

8.2 The Radio Luminosity 74

9 The Spectral Energy Distribution 77

9.1 The Emission in the UV to Near-Infrared Spectral Domain 79

9.1.1 UV, Optical, and Near-IR Colors 81

9.1.2 Fitting SEDs with Population Synthesis Models 83

9.2 The Dust Emission in the Infrared Domain 84

9.2.1 Mid- and Far-Infrared Colors 86

9.3 The Thermal and Nonthermal Radio Emission 90

10 Spectral Features 91

10.1 Galaxy Characterization through Emission and Absorption Lines 91

10.1.1 Classification of the Nuclear Activity 92

10.1.2 Classification of Post-Starburst and Post-Star-Forming Galaxies 92

10.1.3 Line Diagnostics 95

10.2 Gas Metallicity from Emission Lines 101

10.3 Stellar Age and Metallicity from Absorption Lines 103

11 Gas Properties 107

11.1 Gas Density, Mass, and Temperature 107

11.1.1 The Atomic HI Mass 108

11.1.2 The Molecular H2 Mass 115

12 Dust Extinction 125

12.1 Galactic Extinction 126

12.1.1 Extinction Curve 127

12.2 Internal Attenuation 132

12.2.1 Attenuation of the Emission Lines 133

12.2.2 Attenuation of the Stellar Continuum 134

13 Star Formation Tracers 143

13.1 The Initial Mass Function 143

13.2 The Star Formation Rate 144

13.3 The Birthrate Parameter and the Specific Star Formation Rate 146

13.4 The Star Formation Efficiency and the Gas Consumption Time Scale 147

13.5 Hydrogen Emission Lines 147

13.6 UV Stellar Continuum 151

13.7 Infrared 152

13.7.1 Integrated Infrared Luminosity 152

13.7.2 Monochromatic Infrared Luminosities 153

13.8 Radio Continuum 153

13.9 Other Indicators 155

13.9.1 The X-ray Luminosity 155

13.9.2 Forbidden Lines 156

13.9.3 [CII] 157

13.9.4 Radio Recombination Lines 157

13.10 Population Synthesis Models 158

13.10.1 Dating a Star Formation Event 158

14 Light Profiles and Structural Parameters 161

14.1 The Surface Brightness Profile 161

14.1.1 Extended Radial Profiles 161

14.1.2 The Central Surface Brightness Profile of Early-Type Galaxies 162

14.1.3 The Vertical Light Profile of Late-Type Galaxies 166

14.2 Structural Parameters 166

14.2.1 Total Magnitudes, Effective Radii and Surface Brightnesses 166

14.2.2 Bulge to Disk Ratio 167

14.3 Morphological Parameters 168

14.3.1 Concentration Index 168

14.3.2 Asymmetry 168

14.3.3 Clumpiness 169

14.3.4 The Gini Coefficient G and the Second-Order Moment of the Brightest 20% of the Galaxy's Flux M20 169

15 Stellar and Dynamical Masses 171

15.1 Stellar Mass Determination Using Population Synthesis Models 171

15.2 Dynamical Mass 175

15.2.1 Rotation Curves and the Dark Matter Distribution 177

15.2.2 The Total Mass of Elliptical Galaxies from Kinematical Measurements 184

15.2.3 The Total Mass of Elliptical Galaxies from X-ray Measurements 185

15.2.4 The Mass of the Su...

Produktinformationen

Titel: A Panchromatic View of Galaxies
Autor:
EAN: 9783527640270
ISBN: 978-3-527-64027-0
Digitaler Kopierschutz: Adobe-DRM
Format: E-Book (pdf)
Herausgeber: Wiley-Vch
Genre: Astronomie
Anzahl Seiten: 340
Veröffentlichung: 27.11.2012
Jahr: 2012
Untertitel: Englisch
Dateigrösse: 14.4 MB