interesting case of ngc 4473 galaxy - university of...
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Interesting case ofNGC 4473 galaxy
Ana VudragovićaSladjana Knežević
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
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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
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MUSE kinematics of NGC 4473 – single component
12 20
MUSE kinematics of NGC 4473 – two components
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2100
2200
2300
2400
20 40 60R[arcsec]
Vr[
km/s
]
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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
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5
10
10 20 30 40 50R[arcsec]
Age
s [G
yr]
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−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
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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
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