Do galaxy global relationships emerge from local ones? The SDSS IV MaNGA surface mass density-metallicity relation
Por:
Barrera-Ballesteros, Jorge K., Heckman, Timothy M., Zhu, Guangtun B., Zakamska, Nadia L., Sanchez, Sebastian F., Law, David, Wake, David, Green, Jenny E., Bizyaev, Dmitry, Oravetz, Daniel, Simmons, Audrey, Malanushenko, Elena, Pan, Kaike, Roman Lopes, Alexandre, Lane, Richard R.
Publicada:
1 dic 2016
Resumen:
We present the stellar surface mass density versus gas metallicity (S*-Z) relation for more than 500 000 spatially resolved star-forming resolution elements (spaxels) from a sample of 653 disc galaxies included in the SDSS IV MaNGA survey. We find a tight relation between these local properties, with higher metallicities as the surface density increases. This relation extends over three orders of magnitude in the surface mass density and a factor of 4 in metallicity. We show that this local relationship can simultaneously reproduce two well-known properties of disc galaxies: their global mass-metallicity relationship and their radial metallicity gradients. We also find that the S*-Z relation is largely independent of the galaxy's total stellar mass and specific star formation rate (sSFR), except at low stellar mass and high sSFR. These results suggest that in the present-day universe local properties play a key role in determining the gas-phase metallicity in typical disc galaxies. © 2016, Published by Oxford University Press on behalf of the Royal Astronomical Society.
Filiaciones:
Barrera-Ballesteros, Jorge K.:
Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA
Heckman, Timothy M.:
Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA
Zhu, Guangtun B.:
Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA
Zakamska, Nadia L.:
Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA
Inst Adv Study, Einstein Dr, Princeton, NJ 08540 USA
Sanchez, Sebastian F.:
Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico
Law, David:
Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
Wake, David:
Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England
Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
Green, Jenny E.:
Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
Bizyaev, Dmitry:
Apache Point Observ, POB 59, Sunspot, NM 88349 USA
New Mexico State Univ, POB 59, Sunspot, NM 88349 USA
Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia
Oravetz, Daniel:
Apache Point Observ, POB 59, Sunspot, NM 88349 USA
New Mexico State Univ, POB 59, Sunspot, NM 88349 USA
Simmons, Audrey:
Apache Point Observ, POB 59, Sunspot, NM 88349 USA
New Mexico State Univ, POB 59, Sunspot, NM 88349 USA
Malanushenko, Elena:
New Mexico State Univ, POB 59, Sunspot, NM 88349 USA
Pan, Kaike:
New Mexico State Univ, POB 59, Sunspot, NM 88349 USA
Roman Lopes, Alexandre:
Univ La Serena, Fac Ciencias, Dept Fis, La Serena 1200, Chile
Lane, Richard R.:
Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile
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