Who’s Who on Emission Line Diagnostic Diagrams
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Transcript of Who’s Who on Emission Line Diagnostic Diagrams
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Who’s Who on Emission Line Diagnostic Diagrams
A journey through the SDSS + STARLIGHT databases
www.starlight.ufsc.br
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The SEAGal collaboration(Semi Empirical Analysis of Galaxies)
• Students: Jean Michel Gomes UFSC
Marielli Schlickmann UFSC
Natalia Asari UFSC
William Schoenell UFSC
• Pos-Docs: Abilio Mateus IAG+Barcelona
Juan Pablo Papaqui UFSC+INAOE
• “Veterans”: Laerte Sodre IAG
Grazyna Stasynska Meudon
RCF UFSC
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This talk
Data: 573141 (DR5) SDSS galaxies (spectra + images) Å–by–Å STARLIGHT fits Emission lines Physical properties & Star Formation Histories
Goal: Explore how galaxy properties vary accross Diagnostic Diagrams: ~ “Reverse engineering”
www.starlight.ufsc.br
!! ALL AVAILABLE 4 YOU !!
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Galaxy spectra: stars + gas + dust + ...
• Stellar population mix – Star Formation History (SFH)• Gas propeties – ionizing source: stars x AGN • Kinematics & Dust – *, AV
Information on:
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Diagnostic Diagrams: History 1981
Baldwin, Phillips & Terlevich
= BPT!
PNe
HII
AGN
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Diagnostic Diagrams: History 1987
Veilleux & Osterbrock
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Diagnostic Diagrams: History 2000
Veron-Cetty & Veron
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Diagnostic Diagrams: History 2001
Kewley et al
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Diagnostic Diagrams: History 2003
Kauffmann et al
The SDSS revolution
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Diagnostic Diagrams: Gas physics
[Forbidden lines] ~ Thermometers: <k Te>
• In Starbursts: Te => Zgas
• In AGN: Te => <h>AGN & Zgas & ...
Zgas & N/O
LAGN?U?AGN/SB?MBH?Zgas? N/O?
GalaxyProperties?
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Dissecting galaxy spectra: stars + gas
Information on:
SFH(t)
Emission lines
[NII]/H[OIII]/H[OI]/H[SII]/H
[OII]/[OIII]...
HII
Sey 2
LINER
Galaxy Properties
M*
SFR(t)SSFR(t)
*
AV
<log t*>
<Z*>
...
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Physical Properties: Stellar Mass log M*
HII < Sey 2 < LINERs
log MO
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Physical Properties: vel-disp * ~ (MBH)1/4
Sey 2 < LINERs
km / s
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Physical Properties: Mean Age <log t*>
HII < Sey 2 < LINERs
log yr
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Physical Properties: Metallicity <Z*>
HII < Sey 2 < LINERs
log ZO
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Physical Properties: /Fe “enhancement”
Sey 2 < LINERs
Mg
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Physical Properties: Dust extinction AV
Sey 2 > LINERs
mag
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Physical Properties: AGN Power L[OIII]
Sey 2 > LINERs
log LO
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Physical Properties: SF Power SFR
Sey 2 > LINERs
MO/yr
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Physical Properties: log L[OIII] / MBH
Sey 2 > LINERs
log LO/MO
“Eddington ratio”
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Physical Properties: log SSFR(t<100Myr)
Sey 2 > LINERs
log yr-1
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Physical Properties: Evolution!!
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23 log [NII] / H
log
[OII
I] /
H
z = 0.07
Mass = 0%
gaivota cubista / esquartejada
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24 log [NII] / H
log
[OII
I] /
H
z = 0.07
Mass = 25%
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25 log [NII] / H
log
[OII
I] /
H
z = 0.07
Mass = 50%
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26 log [NII] / H
log
[OII
I] /
H
z = 0.07
Mass = 75%
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27 log [NII] / H
log
[OII
I] /
H
z = 0.07
Mass = 100%
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Conclusions• The SF wing: ... ... Natalia’ s talk • AGN: Several interesting Sey 2 LINER trends:
+ SFR-AGN power scalings...
dust age Z* M* /Fe LAGN SFR
Sey 2 > < < < < > > LINER
¿¿ So what ??
We don’ t know (yet)!Watch this space...
log [NII] / H
log
[OII
I] /
H
www.starlight.ufsc.br
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