We study the link between gas flow events and key galaxy scaling relations: the relations between star formation rate (SFR) and stellar mass (the main sequence, MS); gas metallicity and stellar mass (the mass-metallicity relation, MZR); and gas metallicity, stellar mass, and SFR (the fundamental metallicity relation, FMR). Using all star-forming galaxies (SFGs) in the 22 MUSE fields of the MusE GAs FLOw and Wind (MEGAFLOW) surv e y, we deriv e the MS, MZR, and FMR scaling relations for 385 SFGs with M-* = 10(8) - 10(11) . 5 Me at redshifts 0.35 < z < 0.85. Using the MUSE data and complementary X-Shooter spectra at 0.85 < z < 1.4, we determine the locations of 21 SFGs associated with inflowing or outflowing circumgalactic gas (i.e. with strong Mg II absorption in background quasar spectra) relative to these scaling relations. Compared to a control sample of galaxies without gas flows (i.e. without Mg II absorption within 70 kpc of the quasar), SFGs with inflo w e vents (i.e. Mg II absorption along the major axis) are preferentially located abo v e the MS, while SFGs with outflo w e vents (i.e. Mg II absorption along the minor axis) are preferentially more metal rich. Our observations support the scenario in which gas accretion increases the SFR while diluting the metal content and where circumgalactic outflows are found in more metal-rich galaxies.

MusE GAs FLOw and Wind (MEGAFLOW) IX. The impact of gas flows on the relations between the mass, star formation rate, and metallicity of galaxies / Ivanna Langan; Johannes Zabl; Nicolas F Bouché; Michele Ginolfi; Gergö Popping; Ilane Schroetter; Martin Wendt; Joop Schaye; Leindert Boogaard; Jonathan Freundlich; Johan Richard; Jorryt Matthee; Wilfried Mercier; Thierry Contini; Yucheng Guo; Maxime Cherrey. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - ELETTRONICO. - 521:(2023), pp. 546-557. [10.1093/mnras/stad357]

MusE GAs FLOw and Wind (MEGAFLOW) IX. The impact of gas flows on the relations between the mass, star formation rate, and metallicity of galaxies

Michele Ginolfi;
2023

Abstract

We study the link between gas flow events and key galaxy scaling relations: the relations between star formation rate (SFR) and stellar mass (the main sequence, MS); gas metallicity and stellar mass (the mass-metallicity relation, MZR); and gas metallicity, stellar mass, and SFR (the fundamental metallicity relation, FMR). Using all star-forming galaxies (SFGs) in the 22 MUSE fields of the MusE GAs FLOw and Wind (MEGAFLOW) surv e y, we deriv e the MS, MZR, and FMR scaling relations for 385 SFGs with M-* = 10(8) - 10(11) . 5 Me at redshifts 0.35 < z < 0.85. Using the MUSE data and complementary X-Shooter spectra at 0.85 < z < 1.4, we determine the locations of 21 SFGs associated with inflowing or outflowing circumgalactic gas (i.e. with strong Mg II absorption in background quasar spectra) relative to these scaling relations. Compared to a control sample of galaxies without gas flows (i.e. without Mg II absorption within 70 kpc of the quasar), SFGs with inflo w e vents (i.e. Mg II absorption along the major axis) are preferentially located abo v e the MS, while SFGs with outflo w e vents (i.e. Mg II absorption along the minor axis) are preferentially more metal rich. Our observations support the scenario in which gas accretion increases the SFR while diluting the metal content and where circumgalactic outflows are found in more metal-rich galaxies.
2023
521
546
557
Ivanna Langan; Johannes Zabl; Nicolas F Bouché; Michele Ginolfi; Gergö Popping; Ilane Schroetter; Martin Wendt; Joop Schaye; Leindert Boogaard; Jonathan Freundlich; Johan Richard; Jorryt Matthee; Wilfried Mercier; Thierry Contini; Yucheng Guo; Maxime Cherrey
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1311487
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact