7.5

Question 1

Accreting Black Hole Mass

in an AGN

Answer 1

Mass of an accreting black hole in AGNs:

M ≈ 10⁶ - 10¹⁰ M_⊙

Question 2

Accretion Disk

Answer 2

AGNs feature an accretion disk emitting far/extreme UV radiation.

Question 3

Relativistic Particle Jet

Answer 3

Relativistic particle jet:

• Perpendicular to the disk in AGNs
• Can be weak or strong

Question 4

Broad Line Region (BLR)

Answer 4

BLR in AGNs:

• high density
• high velocity

clouds near black hole < 1 pc

Question 5

Narrow Line Region (NLR)

Answer 5

NLR in AGNs:

Low density clouds on scales of ≈ 1 kpc

Question 6

Dust Torus

Answer 6

A dust torus exists outside the accretion disk in AGNs.

Question 7

Photoionization of BLR and NLR

Answer 7

BLR and NLR in AGNs are photoionized by UV radiation from the disk.

Question 8

Dust Torus Heating

Answer 8

The dust torus in AGNs is heated by disk radiation.

Question 9

Dust Torus Obscuration

Answer 9

Edge-on systems: Dust torus hides the central region (disk and BLR) in AGNs.

Question 10

Extended Radio Emission

is produced by …

Answer 10

Strong jets in AGNs produce extended radio emission.

Question 11

Variability and Superluminal Motion

AGNs

Answer 11

Jets aligned with line of sight in AGNs produce strong variability and superluminal motion.

Question 12

Seyfert Galaxies

what are the types and their properties?

Answer 12

AGN in spiral galaxies
- Seyfert I: pole-on view, showing BLR and disk
- Seyfert II: edge-on view, showing strong emission lines from the center

Question 13

Radio Galaxies

what are the types

Answer 13

• BLRG: broad-line radio galaxy, pole-on view
• NLRG: narrow-line radio galaxy, edge-on view

AGN with strong jet in elliptical galaxy

Question 14

Quasars, QSO, Blasars

Answer 14

High Luminosity > 10¹³ L_⊙

• Quasars: radio-loud AGNs with jet
• QSO: quasi-stellar object without strong radio emission
• Blasars: high luminosity AGN with direct jet view, e.g., BL Lac