Ageing, quenching and rejuvenation in SDSS galaxies
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1 Ageing, quenching and rejuvenation in SDSS galaxies Javier Casado (Universidad Autónoma de Madrid) Carmen de la Victoria, Albayzin, Granada
2 What do we mean by... Ageing, quenching and rejuvenation...
3 What do we mean by... EVO Ageing, quenching and rejuvenation... LUT I ON
4 What do we mean by... EVO Ageing, quenching and rejuvenation... RED SEQUENCE LUT I ON green valley your favourite color BLUE CLOUD your favourite mass/luminosity indicator
5 What do we mean by... EVO Ageing, quenching and rejuvenation... RED SEQUENCE LUT I ON green valley your favourite color BLUE CLOUD Peng et al FAST - QUENCHING - NATURE? NURTURE? BLUE CLOUD green valley RED SEQUENCE your favourite mass/luminosity indicator
6 What do we mean by... EVO Ageing, quenching and rejuvenation... RED SEQUENCE LUT I ON green valley your favourite color BLUE CLOUD Peng et al FAST - QUENCHING - NATURE? NURTURE? BLUE CLOUD your favourite mass/luminosity indicator green valley RED SEQUENCE Schawinski et al Morphology is a KEY aspect - ET galaxies evolve fast merger nurture - LT galaxies evolve slowly? nature NO BIMODALITY
7 How did we approach EVOLUTION...
8 How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction
9 How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction We focus on the SSFR Casado et al We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color
10 How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction We focus on the SSFR Casado et al We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color
11 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
12 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
13 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
14 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
15 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
16 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
17 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
18 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 ies lax a g 0 50 ~82 R1/R2, R5/ȓ E V A ON E G A R Morphology H (EW), (u-r) color Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
19 How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv: Mr, 03N2 ies lax a g 0 50 ~82 R1/R2, R5/ȓ E V A ON E G A R Morphology H (EW), (u-r) color NATURE Chemically primitive Chemically evolved Gas rich, metal poor, low mass Gas poor, metal rich, higher masses
20 What do we mean by NATURE The definition of age is something a bit odd... mass-weighted average age
21 Ha(EW) Ageing... (u-r) color
22 107 yr Ha(EW) Ageing... (u-r) color yr TWO PROXIES FOR THE SSFR BUT WITH DIFFERENT TIME SCALES
23 Ha(EW) Quenching (+ageing) (u-r) color
24 Rejuvenation Ha(EW) (+quenching + ageing) (u-r) color
25 Ha(EW) (u-r) color
26 Ha(EW) (u-r) color
27 Ha(EW) (u-r) color
28 Ha(EW) FA SL OW ER ER ST (u-r) color
29 Conclusions (on average) - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant Casado et al accepted - arxiv:
30 - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant - EVERYBODY AGES ageing Ha(EW) Conclusions (on average) (u-r) color Casado et al accepted - arxiv:
31 - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant - EVERYBODY AGES ageing - Ha(EW) Conclusions (on average) quenching and rejuvenation episodes occur - if gas is conserved (more likely in the field) scatter (u-r) color Casado et al accepted - arxiv:
32 - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant - EVERYBODY AGES ageing - quenching and rejuvenation episodes occur - if gas is conserved (more likely in the field) scatter - if gas is completely removed quenching EXCLUSIVE OF THE DENSEST ENVIRONMENTS Ha(EW) Conclusions (on average) (u-r) color Casado et al accepted - arxiv:
33 - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant - EVERYBODY AGES ageing - - quenching and rejuvenation episodes occur - if gas is conserved (more likely in the field) scatter - if gas is completely removed quenching EXCLUSIVE OF THE DENSEST ENVIRONMENTS MORPHOLOGY AS A CONSEQUENCE RATHER THAN THE CAUSE. Ha(EW) Conclusions (on average) (u-r) color Casado et al accepted - arxiv:
34 thanks.
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