Population gradients in the Sloan Digital Sky Survey Galaxy Catalogue: the role of merging

Tortora, C.; Napolitano, N. R.

doi:10.1111/j.1365-2966.2012.20478.x

Cited by 11 publications

(10 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results are also in reasonable agreement with a previous photometric study by Tortora & Napolitano (2012), who analyse the differences in colour and stellar population gradients as a function of environment for central and satellite galaxies from SDSS imaging. They find that in most cases, age and metallicity gradients generally do not depend on environmental density.…”

Section: Discussionsupporting

confidence: 92%

SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment

Goddard

Thomas

Maraston

et al. 2016

Mon. Not. R. Astron. Soc.

View full text Add to dashboard Cite

We study the internal radial gradients of stellar population properties within 1.5 R e and analyse the impact of galaxy environment. We use a representative sample of 721 galaxies with masses ranging between 10 9 M to 10 11.5 M from the SDSS-IV survey MaNGA. We split this sample by morphology into early-type and late-type galaxies. Using the full spectral fitting code FIREFLY, we derive the light and mass-weighted stellar population properties age and metallicity, and calculate the gradients of these properties. We use three independent methods to quantify galaxy environment, namely the N th nearest neighbour, the tidal strength parameter Q and distinguish between central and satellite galaxies. In our analysis, we find that early-type galaxies generally exhibit shallow light-weighted age gradients in agreement with the literature and mass-weighted median age gradients tend to be slightly positive. Latetype galaxies, instead, have negative light-weighted age gradients. We detect negative metallicity gradients in both early and late-type galaxies that correlate with galaxy mass, with the gradients being steeper and the correlation with mass being stronger in late-types. We find, however, that stellar population gradients, for both morphological classifications, have no significant correlation with galaxy environment for all three characterisations of environment. Our results suggest that galaxy mass is the main driver of stellar population gradients in both early and late-type galaxies, and any environmental dependence, if present at all, must be very subtle.

show abstract

Section: Discussionsupporting

confidence: 92%

SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment

Goddard

Thomas

Maraston

et al. 2016

Mon. Not. R. Astron. Soc.

View full text Add to dashboard Cite

show abstract

“…The relationship between R e or Sérsic index and mass, luminosity and its evolution with redshift has been demonstrated to be a fundamental probe of galaxy evolution and the role of mass accretion in galaxy merging (Trujillo et al 2007;Hilz et al 2013;Tortora et al 2014). This characterization of 2D light profiles also allows one to determine the colour gradients (La Barbera & de Carvalho 2009;Tortora et al 2010aTortora et al , 2011aLa Barbera et al 2011Tortora & Napolitano 2012), which can be compared to simulations (e.g. Tortora et al 2011bTortora et al , 2013.…”

Section: Galaxy Structural Parameters and Scaling Relationsmentioning

confidence: 99%

The first and second data releases of the Kilo-Degree Survey

Jong

Kleijn

Boxhoorn

et al. 2015

A&A

274

229

View full text Add to dashboard Cite

Context. The Kilo-Degree Survey (KiDS) is an optical wide-field imaging survey carried out with the VLT Survey Telescope and the OmegaCAM camera. KiDS will image 1500 square degrees in four filters (ugri), and together with its near-infrared counterpart VIKING will produce deep photometry in nine bands. Designed for weak lensing shape and photometric redshift measurements, its core science driver is mapping the large-scale matter distribution in the Universe back to a redshift of ∼0.5. Secondary science cases include galaxy evolution, Milky Way structure, and the detection of high-redshift clusters and quasars. Aims. KiDS is an ESO Public Survey and dedicated to serving the astronomical community with high-quality data products derived from the survey data. Public data releases, the first two of which are presented here, are crucial for enabling independent confirmation of the survey's scientific value. The achieved data quality and initial scientific utilization are reviewed in order to validate the survey data. Methods. A dedicated pipeline and data management system based on A-WISE, combined with newly developed masking and source classification tools, is used for the production of the data products described here. Science projects based on these data products and preliminary results are outlined. Results. For 148 survey tiles (≈160 sq.deg.) stacked ugri images have been released, accompanied by weight maps, masks, source lists, and a multi-band source catalogue. Limiting magnitudes are typically 24.3, 25.1, 24.9, 23.8 (5σ in a 2 aperture) in ugri, respectively, and the typical r-band PSF size is less than 0.7 . The photometry prior to global homogenization is stable at the ∼2% (4%) level in gri (u) with some outliers due to non-photometric conditions, while the astrometry shows a typical 2D rms of 0.03 . Early scientific results include the detection of nine high-z QSOs, fifteen candidate strong gravitational lenses, high-quality photometric redshifts and structural parameters for hundreds of thousands of galaxies.

show abstract

“…There are many previous studies focused on the gradients of galaxies, e.g. correlation between age, metallicity gradients and galaxy properties such as stellar mass, colour, velocity dispersion (Mehlert et al 2003;Sánchez-Blázquez et al 2007;Koleva et al 2009;Spolaor et al 2009;MacArthur et al 2009;Kuntschner et al 2010;Tortora et al 2010;Rawle et al 2010; La Barbera et al 2012;Kuntschner 2015) and environments (Sánchez-Blázquez et al 2006b;Tortora & Napolitano 2012;Roediger et al 2011;Zheng et al 2017;Goddard et al 2017).…”

mentioning

confidence: 99%

SDSS-IV MaNGA: global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass–size plane

Mao

Cappellari

et al. 2018

Monthly Notices of the Royal Astronomical Society

136

124

View full text Add to dashboard Cite

We perform full spectrum fitting stellar population analysis and Jeans Anisotropic modelling (JAM) of the stellar kinematics for about 2000 early-type galaxies (ETGs) and spiral galaxies from the MaNGA DR14 sample. Galaxies with different morphologies are found to be located on a remarkably tight mass plane which is close to the prediction of the virial theorem, extending previous results for ETGs. By examining an inclined projection ('the mass-size' plane), we find that spiral and early-type galaxies occupy different regions on the plane, and their stellar population properties (i.e. age, metallicity and stellar mass-to-light ratio) vary systematically along roughly the direction of velocity dispersion, which is a proxy for the bulge fraction. Galaxies with higher velocity dispersions have typically older ages, larger stellar mass-to-light ratios and are more metal rich, which indicates that galaxies increase their bulge fractions as their stellar populations age and become enriched chemically. The age and stellar mass-to-light ratio gradients for low-mass galaxies in our sample tend to be positive (centre < outer), while the gradients for most massive galaxies are negative. The metallicity gradients show a clear peak around velocity dispersion log 10 σ e ≈ 2.0, which corresponds to the critical mass ∼ 3 × 10 10 M of the break in the mass-size relation. Spiral galaxies with large mass and size have the steepest gradients, while the most massive ETGs, especially above the critical mass M crit > ∼ 2 × 10 11 M , where slow rotator ETGs start dominating, have much flatter gradients. This may be due to differences in their evolution histories, e.g. mergers.

show abstract

Population gradients in the Sloan Digital Sky Survey Galaxy Catalogue: the role of merging

Cited by 11 publications

References 48 publications

SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment

SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment

The first and second data releases of the Kilo-Degree Survey

SDSS-IV MaNGA: global stellar population and gradients for about 2000 early-type and spiral galaxies on the mass–size plane

Contact Info

Product

Resources

About