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!!

23 log [NII] / H

log

[OII

I] /

H

z = 0.07

Mass = 0%

gaivota cubista / esquartejada

24 log [NII] / H

log

[OII

I] /

H

z = 0.07

Mass = 25%

25 log [NII] / H

log

[OII

I] /

H

z = 0.07

Mass = 50%

26 log [NII] / H

log

[OII

I] /

H

z = 0.07

Mass = 75%

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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