Discovery of Substructure in Nearby Reverberation-Mapped Active Disk Galaxies with DiskFit Público

Bier, Justin (Spring 2020)

Permanent URL: https://etd.library.emory.edu/concern/etds/cj82k8294?locale=es
Published

Abstract

We use the kinematic and photometric modeling algorithm DiskFit for a sample of three nearby active disk galaxies with well determined MBH estimates via reverberation mapping. We use spatially resolved velocity maps from Integral Field Spectroscopy (IFS) in conjunction with high resolution photometry to identify and determine quantitative estimates of the geometry and strength of distinct morphological components. This research aims to use both branches ofDiskFit modeling to gain insight into the kinematics of our sample galaxies and analyze the contribution from each distinct component using trends with the first four Gauss-Hermite moments for the line-of-sight velocity distribution. Future work will attempt to isolate the kinematics of the bulge for calibration of the MBH-s* relationship, which is foundational to reverberation mapping, and to understand the effects of morphological components on bulge stellar velocity dispersion, s*. In this paper we present kinematic models consisting of disk, bar, and radial flow components (K-D-B-RF) for NGC 3516, NGC 4151, and NGC 5548. We show the presence of distinct disk, bar, and bulge components (P-D-B-Blg) well represented by photometric DiskFit models for NGC 3516. We confirm the presence of a barlens in NGC 4151, first suggested by observations, from comparison of the DiskFit bar component kinematics and simulations at similar nearly face-on inclinations. However, we show inaccuracies in the photometric models for NGC 4151 stemming from the weak bar and a known degeneracy occurring when the position angle of the bar is within ~10° of either the major or minor axis of the disk component. We find non-circular motion within NGC 5548 likely attributed to the aftermath of a major merger event.

Table of Contents

1. Introduction--------------------------------------------------------------------------------------------------- 1

2. Sample---------------------------------------------------------------------------------------------------------- 7

3. Data-------------------------------------------------------------------------------------------------------------- 9

3.1 Kinematic Data------------------------------------------------------------------------------------------- 9

3.2 Photometric Data--------------------------------------------------------------------------------------- 13

4. Methods-------------------------------------------------------------------------------------------------------- 14

4.1 Kinematics------------------------------------------------------------------------------------------------ 15

4.1.1 DiskFit Kinematic Modeling Abilities--------------------------------------------------------- 15

4.1.2 Kinematic Modeling Procedure---------------------------------------------------------------- 17

4.2 Photometry----------------------------------------------------------------------------------------------- 19

4.2.1 DiskFit Photometric Modeling Abilities------------------------------------------------------ 19

4.2.2 Photometry Modeling Procedure------------------------------------------------------------- 21

5. Results----------------------------------------------------------------------------------------------------------- 22

5.1 NGC 3516------------------------------------------------------------------------------------------------- 22

5.1.1 Kinematics------------------------------------------------------------------------------------------ 22

5.1.2 Photometry----------------------------------------------------------------------------------------- 25

5.2 NGC 4151------------------------------------------------------------------------------------------------- 26

5.2.1 Kinematics------------------------------------------------------------------------------------------ 26

5.2.2 Photometry----------------------------------------------------------------------------------------- 29

5.3 NGC 5548 Kinematics---------------------------------------------------------------------------------- 31

6. Analysis--------------------------------------------------------------------------------------------------------- 33

6.1 Kinematic Model Analysis----------------------------------------------------------------------------- 33

6.1.1 Distinct Kinematic Structure------------------------------------------------------------------- 33

6.1.2 Rotation Curve Offset Inquiry------------------------------------------------------------------ 38

6.2 Photometric Model Analysis------------------------------------------------------------------------- 43

6.2.1 Distinct Photometric Structure---------------------------------------------------------------- 43

6.2.2 Photometric Models at Different Fields of View------------------------------------------ 45

6.2.3 Bulge Region and Sérsic Index Analysis------------------------------------------------------ 46

6.3 Model Comparisons------------------------------------------------------------------------------------ 48

6.3.1 Kinematic Models from Literature------------------------------------------------------------ 48

6.3.2 Photometric Models from Literature-------------------------------------------------------- 52

6.3.3 Agreement Between Kinematics and Photometry---------------------------------------- 54

6.3.4 Gauss-Hermite Moment Trends--------------------------------------------------------------- 54

7. Conclusions---------------------------------------------------------------------------------------------------- 58

8. Future Work--------------------------------------------------------------------------------------------------- 60

References--------------------------------------------------------------------------------------------------------- 62

Appendix----------------------------------------------------------------------------------------------------------- 66

Tables and Figures

Table 1: Sample Characteristics------------------------------------------------------------------------------ 9

Table 2: NGC 3516 Kinematic Models---------------------------------------------------------------------- 23

Table 3: NGC 3516 Photometric Models------------------------------------------------------------------- 27

Table 4: NGC 4151 Kinematic Models---------------------------------------------------------------------- 29

Table 5: NGC 4151 Photometric Models------------------------------------------------------------------- 32

Table 6: NGC 5548 Kinematic Models---------------------------------------------------------------------- 35

Table 7: Kinematic Velocity Offsets------------------------------------------------------------------------- 41

Table 8: NGC 3516 Smaller Field of View Photometric Models-------------------------------------- 47

Table 9: NGC 3516 All Best Fit Models--------------------------------------------------------------------- 55

Table 10: NGC 4151 All Best Fit Models-------------------------------------------------------------------- 56

Figure 1: NGC 3516 Input Data------------------------------------------------------------------------------- 10

Figure 2: NGC 4151 Input Data------------------------------------------------------------------------------- 11

Figure 3: NGC 5548 Input Data------------------------------------------------------------------------------- 12

Figure 4: The Hexpak IFU Fiber Map------------------------------------------------------------------------ 13

Figure 5: NGC 3516 Kinematic Residual Plots------------------------------------------------------------- 24

Figure 6: NGC 3516 Disk, Bar, and Radial Flow Model Profile---------------------------------------- 25

Figure 7: NGC 3516 Residual Images------------------------------------------------------------------------ 28

Figure 8: NGC 4151 Residual Plots--------------------------------------------------------------------------- 30

Figure 9: NGC 4151 Disk, Bar, and Radial Flow Model Profile---------------------------------------- 31

Figure 10: NGC 4151 Disk Only Photometric Model---------------------------------------------------- 33

Figure 11: NGC 4151 Disk and Bar Photometric Model------------------------------------------------ 34

Figure 12: NGC 5548 Residual Plots------------------------------------------------------------------------- 36

Figure 13: NGC 5548 Disk, Bar, and Radial Flow Model Profile--------------------------------------- 37

Figure 14: NGC 3516 Kinematically Distinct Components--------------------------------------------- 38

Figure 15: NGC 4151 Kinematically Distinct Components--------------------------------------------- 39

Figure 16: NGC 5548 Kinematically Distinct Components--------------------------------------------- 40

Figure 17: Offset Rotation Curves for all Kinematic Models------------------------------------------ 42

Figure 18: Homogenized Method Rotation Curves for Best Kinematic Models------------------ 44

Figure 19: NGC 3516 Photometrically Distinct Components------------------------------------------ 46

Figure 20: NGC 3516 Smaller Field of View Photometric Residual Images------------------------ 48

Figure 21: NGC 3516 Photometrically Distinct Components at a Smaller Field of View-------- 49

Figure 22: NGC 3516 Radial Intensity Plots for Two Fields of View---------------------------------- 50

Figure 23: NGC 4151 Radial Intensity Plots for both Photometric Models------------------------ 51

Figure 24: Major Axis Gauss-Hermite Moment Trends------------------------------------------------- 58

Table A1: Table of Abbreviations---------------------------------------------------------------------------- 66

Table A2: Galfit Morphological Decomposition of the Sample from Literature------------------ 67

Figure A1: DiskFit Example Kinematic Input File--------------------------------------------------------- 68

Figure A2: DiskFit Example Kinematic Output File------------------------------------------------------- 69

Figure A3: Smoothed Vorbin plots for NGC 3516 Kinematics----------------------------------------- 70

Figure A4: Smoothed Vorbin plots for NGC 4151 Kinematics----------------------------------------- 71

Figure A5: Smoothed Vorbin plots for NGC 5548 Kinematics----------------------------------------- 72

Figure A6: Galfit Models of the Sample from Literature----------------------------------------------- 73

Figure A7: NGC 3516 Kinematic DiskFit Results from Literature------------------------------------- 74

Figure A8: NGC 5548 Kinematic DiskFit Results from Literature------------------------------------- 75

Figure A9: Inner 3” x 3” Rotation Curves for NGC 3516 and NGC 5548 from Literature------- 76

Figure A10: NGC 3516 Rotation Curve from Literature------------------------------------------------- 77

Figure A11: NGC 4151 Rotation Curve from Literature------------------------------------------------- 78

Figure A12: Kinematic Signatures of Face-on Boxy/Peanut Bulges from Literature------------- 79

Figure A13: Gauss-Hermite Indications of a Face-on Boxy/Peanut Bulges from Literature--- 80

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