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A Jorney Through the Lives of Local Galaxies As Revealed by Their

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A Jorney Through the Lives of Local Galaxies As Revealed by Their A jorney through the lives of local galaxies as revealed by their ionized gas A preview of several projects studying ionized gas and stellar populations in local galaxies RENÉ ALBERTO ORTEGA MINAKATA Cosmic Feast of the elements Puebla, Pue., Mexico 1 Oct 26, 2017 Collaborators ● Sebastián F. Sánchez (IA-UNAM) The GIFU group: (U. Guanajuato, UNAN- ● Thiago S. Gonçalves Managua, U. Querétaro...) ● Karín Menéndez-Delmestre ● Juan Pablo Torres-Papaqui ● Marco Grossi ● Marcel Chow-Martínez ● and the LASEX/OV group ● Abdías Morales from Observatório ● Josué Trejo-Alonso do Valongo / UFRJ ● Fernando Romero-Cruz INAOE: ● Aitor Robleto-Orús ● D. Mayya ● Daniel Neri-Larios ● A. L. Longinotti 2 & the CALIFA collaboration Galaxy populations bimodality (Kauffmann et al. 2003) 3 Star formation “main sequence” (Brinchmann et al. 2004) 4 But... ● Spectra of galaxies in SDSS-Legacy are integrated: – a single fiber for the whole central part of a galaxy for “nearby” galaxies – a single fiber for the whole galaxy for galaxies farther away ● We want to know not only when but where within these galaxies these processes are happening → and if individual regions behave as the whole galaxy does 5 Integral Field Spectroscopy Datacubes: ● A spectrum per pixel ● Image “slices” ● Detailed, spatially- resolved information on each galaxy Credit: www.caha.es M. Roth 6 “Postcard” from the CALIFA survey Calar Alto Legacy Integral Field spectroscopy Area survey ● Detailed, spatially-resolved information on a statistically significant sample From DR2 paper (García-Benito 7 et al. 2015) Nitrogen abundance and stellar populations of star-forming galaxies from the CALIFA survey ● In Torres-Papaqui et al. (2012) we found that N-enriched SF galaxies (from SDSS-Legacy) have older mean stellar ages → is a local process responsible for this global property? ● Compare N/O vs O/H locally ● Verify if there is a local relation between the ages of the stellar populations and the N/O and O/H 8 Sample ● 98 SF galaxies from the CALIFA parent sample (z = 0.003—0.03): – as classified using BPT diagram from their integrated (SDSS) spectra → assures absence of AGN-dominated galaxies – observed with both setups (V500 and V1200) as of Feb. 15, 2016, with available COMB datacube (FOV ~ 1.2 x 1.2 arcmin, hex) 9 Starlight fits ● Perfomed Starlight fits to spectra within cubes: – Cardelli, Claython & Mathis (1989) extinction law + Bruzual & Charlot (2003) models: ● Chabrier (2003) IMF ● Padova 1994 tracks (Bertelli et al. 1994) ● MILES library (Sánchez-Blázquez et al. 2006) ● Recover stellar populations kinematics, age and metallicity + ionized gas diagnostics, kinematics and abundances 10 Abundances: O/H and N/O from strong-line methods ● O/H: – O3N2 (Pérez-Montero & Contini 2009, PMC09) – O3N2 (Marino et al. 2013, Mar13) – N2 (PMC09) – N2 (Mar13) – R23 (PMC09) – R3 (Vacca & Conti, 1992, VC92) ● N/O: – N2O2 (PMC09) – N2S2 (PMC09) 11 – R23 (Thurston et al. 1996, Th96) Stellar flux and velocity maps 12 Halpha intensity and velocity maps 13 BPT diagram and map 14 Mean stellar age and metallicity 15 Selection of star-forming regions ● All spaxels: – With EW(Halpha) > 6 – Below the Kewley et al. (2001) curve ● Given the sample selection, loss of spaxels over the 98 galaxies is ~ 0.1% 16 Gas metallicity (O/H—O3N2 Mar13) N abundance (N/O—N2O2 PMC09) 17 Mass-metallicity relation(s) 18 Mass-metallicity relation(s)--resolved! 19 SFMS & N/O vs O/H 20 There's always (a lot of) work to do GIFU + LASEX groups (CALIFA, MUSE, direct observations with PMAS/PPAK): ● Analysis pipeline (Chow-Martínez+) ● Effect of interactions (Morales+) ● ANG influence radius, met., outflows (Robleto-Orús+) ● Ringed galaxies (Ortega-Minakata+) ● Virgo dwarfs (Grossi+) ● Dynamics of ionized filament in M 87 (Ortega-Minakata, Sánchez, López-Cobá, et al.) ● Dynamics of Kaz364 (??) ● Local SFR vs. bulge dynamics & AGN presence (Trejo- 21 Alonso+) Virgo Dwarfs (Grossi et al., in prep.) ● 6 galaxies observed (2016, 2017) with PMAS/PPAK @ 3.5m in Calar Alto → CALIFA configuration – Analyzed with our Starlight-based suite ● Currently under analysis (Next slide is a preview) 22 23 Ring galaxies: a preview ● 15 galaxies from Romano et al. (2008) – “Classical ring galaxies” → collision confirmed or suspected ● 8 galaxies observed (March 2017) with PMAS/PPAK @ 3.5m in Calar Alto → CALIFA configuration – CALIFA ancillary → analysis PIPE3D – Also analyzed with our Starlight-based suite ● Test collision model: do resolved stellar populations reproduce collision ages derived from different methods? 24 Ring galaxies: a preview 25 NGC 985 – Halpha preview (MUSE) 26 Cartwheel – Halpha preview (MUSE) 27 AGN-driven outflows with MUSE ● PhD thesis of A. Robleto-Orús (Guanajuato) – Just started! – Work with J. P. Torres-Papaqui ● 27 AGN-hosts from AMUSING – To search for outflows within ● There is already an example with CALIFA (Robleto-Orús et al. in prep. – preliminary!) 28 NGC 681 [OIII]5007 flux Blue-shifted component Red-shifted component Robleto-Orús et al. (in prep.) – Poster 19!! 29 Kaz364 – Halpha preview (MUSE) 30 Take-away points → IFS of ionized gas & stellar populations in galaxies: ● Test global relations locally ● Test models of formation & evolution of special samples in great detail ● Find & study outflows on galactic scales ● Test the starburst-AGN connection 31 Thank you!! A piece of the giant mural in the renovated port area in Rio de Janeiro 32.
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