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... Workshop Estallidos - Granada 2015 Javier Casado - UAM What do we mean by... EVO Ageing, quenching and rejuvenation... Workshop Estallidos - Granada 2015 LUT I ON Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM How did we approach EVOLUTION... Workshop Estallidos - Granada 2015 Javier Casado - UAM How did we approach EVOLUTION... Uffff… mass metallicity luminosity age star-formation stellar-to-gas fraction Workshop Estallidos - Granada 2015 Javier Casado - UAM How did we approach EVOLUTION... Uffff… mass metallicity luminosity age star-formation stellar-to-gas fraction Workshop Estallidos - Granada 2015 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 Javier Casado - UAM How did we approach EVOLUTION... Uffff… mass metallicity luminosity age star-formation stellar-to-gas fraction Workshop Estallidos - Granada 2015 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 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM What do we mean by… NATURE The definition of age is something a bit odd... Workshop Estallidos - Granada 2015 mass-weighted average age Javier Casado - UAM Ha(EW) Ageing... (u-r) color Workshop Estallidos - Granada 2015 Javier Casado - UAM 107 yr Ha(EW) Ageing... (u-r) color 108.5 yr TWO PROXIES FOR THE SSFR BUT WITH DIFFERENT TIME SCALES Workshop Estallidos - Granada 2015 Javier Casado - UAM Ha(EW) Quenching (+ageing) (u-r) color Workshop Estallidos - Granada 2015 Javier Casado - UAM Rejuvenation Ha(EW) (+quenching + ageing) (u-r) color Workshop Estallidos - Granada 2015 Javier Casado - UAM Ha(EW) Workshop Estallidos - Granada 2015 (u-r) color Javier Casado - UAM Ha(EW) Workshop Estallidos - Granada 2015 (u-r) color Javier Casado - UAM Ha(EW) Workshop Estallidos - Granada 2015 (u-r) color Javier Casado - UAM Ha(EW) FA SL OW ER ER ST Workshop Estallidos - Granada 2015 (u-r) color Javier Casado - UAM 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM - 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM - 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM - 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 Workshop Estallidos - Granada 2015 Javier Casado - UAM - 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. Workshop Estallidos - Granada 2015 Ha(EW) Conclusions (on average) (u-r) color Casado et al. 2015 accepted - arXiv:1504.07010 Javier Casado - UAM thanks. Workshop Estallidos - Granada 2015 Javier Casado - UAM
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