Interesting case of NGC 4473 galaxy - University of...

Interesting case ofNGC 4473 galaxy

Ana VudragovićaSladjana Knežević

aana@aob.rs

Astronomical Observatoryof Belgrade

12. 11. 2019.

The Most Famous Classification Scheme

1 20

Revised Hubble’s Scheme

Kormendy & Bender 1996: ApJL, 464, 119

2 20

Revised Hubble’s Scheme

Kormendy & Bender 1996: ApJL, 464, 119

2 20

Revised Hubble’s Scheme

Kormendy & Bender 1996: ApJL, 464, 119

2 20

Integral Field Spectroscopy – IFS

Image credit: Stephen Todd (ROE) and Douglas Pierce-Price (JAC)

3 20

Rerevised Hubble’s Scheme

Cappellari+ 2011: MNRAS 416, 1680

ε = 1− b/a = 0.4

4 20

Rerevised Hubble’s Scheme

Cappellari+ 2011: MNRAS 416, 1680

5 20

NGC 4473: V-band image (1.4m Milanković telescope)

GALFIT – Peng et al. 2010: AJ, 139, 2097

67”.5

104”.7

8’.3 x 8’.3

.12”.8

1137”.2

6”.5 53”.4

I(R) = Ieff exp−κn

[( RReff

)1/n−1]

µ(R) = µeff + 2.5κnln(10)

[(RReff

) 1n − 1

]

# µeff

[mag(”)2

]Reff [”] n

1 22.2 67.5 12 19.0 12.8 2.73 20.2 6.5 1

Table: Three Sersic components

6 20

1D Spectroscopy

4750 5000 5250 5500 5750 6000 6250 6500 6750Wavelength ( )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

7 20

1D Spectroscopy

4750 5000 5250 5500 5750 6000 6250 6500 6750Wavelength ( )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

8 20

1D Spectroscopy

5100 5150 5200 5250 5300 5350 5400Wavelength ( )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

9 20

1D Spectroscopy

5100 5150 5200 5250 5300 5350 5400Wavelength ( )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

10 20

1D Spectroscopy: pPxf (Cappellari+ 2018)

4750 5000 5250 5500 5750 6000 6250 6500 6750Wavelength ( )

0.0

0.2

0.4

0.6

0.8

1.0

1.2

11 20

MUSE kinematics of NGC 4473 – single component

12 20

MUSE kinematics of NGC 4473 – two components

● ● ●

●● ● ●

● ● ●

● ● ●

●

●

● ● ●●

● ● ●●

●

●●

2100

2200

2300

2400

20 40 60R[arcsec]

Vr[

km/s

]

●

●

●

●●

●

●

●

● ●

●●

●

● ● ●● ●

●

● ●

●

●

●

●

●

50

100

150

20 40 60R[arcsec]

σ [k

m/s

]

13 20

Simple Stellar Population - SSP

14 20

Lick indices

25 Lick indices

Worthey 1994Worthey & Ottaviani 1997

15 20

Rmodel – Cardiel+ 2003: A&A, 409, 511

16 20

Single spectrum modelling

17 20

Ages and metallicities

●

●

●

●

●

●

●

●

●

●

●

●

●

●

5

10

10 20 30 40 50R[arcsec]

Age

s [G

yr]

●

●

●

●

●

●

●

●●

●

● ●

●

●

−0.2

0.0

0.2

0.4

10 20 30 40 50R[arcsec]

[Z/H

]

18 20

Density distributions - quest for bimodalty

0.00

0.05

0.10

0.15

4 8 12 16Ages

dens

ity

0.0

0.5

1.0

1.5

−0.2 0.0 0.2 0.4 0.6[Z/H]

dens

ity

19 20

GIST (Galaxy IFU Spectroscopy Tool) Pipeline

https://abittner.gitlab.io/thegistpipeline/Bittner+ 2019 (arXiv:190604746B)

–30

–20

–10

0

10

20

30

∆δ

[arc

sec]

– 70 / 70

Vstellar[km/s] NGC1433

55 / 140

σstellar[km/s]

–30–20–100102030∆α [arcsec]

–30

–20

–10

0

10

20

30

∆δ

[arc

sec]

– 0.10 / 0.10

h3

–30–20–100102030∆α [arcsec]

– 0.05 / 0.15

h4

20 / 20