Ageing, quenching and rejuvenation in SDSS galaxies Javier Casado (Universidad Autónoma de Madrid) Carmen de la Victoria, Albayzin, Granada
What do we mean by... Ageing, quenching and rejuvenation...
What do we mean by... EVO Ageing, quenching and rejuvenation... LUT I ON
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
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. 2010 FAST - QUENCHING - NATURE? NURTURE? BLUE CLOUD green valley RED SEQUENCE your favourite mass/luminosity indicator
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. 2010 FAST - QUENCHING - NATURE? NURTURE? BLUE CLOUD your favourite mass/luminosity indicator green valley RED SEQUENCE Schawinski et al. 2014 - Morphology is a KEY aspect - ET galaxies evolve fast merger nurture - LT galaxies evolve slowly? nature NO BIMODALITY
How did we approach EVOLUTION...
How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction
How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction We focus on the SSFR Casado et al. 2015 We use proxies accepted - arxiv:1504.07010 Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color
How did we approach EVOLUTION... Uffff mass metallicity luminosity age star-formation stellar-to-gas fraction We focus on the SSFR Casado et al. 2015 We use proxies accepted - arxiv:1504.07010 Mr, 03N2 R1/R2, R5/ȓ Morphology H (EW), (u-r) color
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
How did we approach EVOLUTION... Uffff We focus on the SSFR Casado et al. 2015 mass metallicity luminosity age star-formation stellar-to-gas fraction We use proxies accepted - arxiv:1504.07010 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
What do we mean by NATURE The definition of age is something a bit odd... mass-weighted average age
Ha(EW) Ageing... (u-r) color
107 yr Ha(EW) Ageing... (u-r) color 108.5 yr TWO PROXIES FOR THE SSFR BUT WITH DIFFERENT TIME SCALES
Ha(EW) Quenching (+ageing) (u-r) color
Rejuvenation Ha(EW) (+quenching + ageing) (u-r) color
Ha(EW) (u-r) color
Ha(EW) (u-r) color
Ha(EW) (u-r) color
Ha(EW) FA SL OW ER ER ST (u-r) color
Conclusions (on average) - nature is the main driving mechanism interactions, mergers DO HAPPEN, but are not statistically significant Casado et al. 2015 accepted - arxiv:1504.07010
- 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. 2015 accepted - arxiv:1504.07010
- 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. 2015 accepted - arxiv:1504.07010
- 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. 2015 accepted - arxiv:1504.07010
- 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. 2015 accepted - arxiv:1504.07010
thanks.