J/A+A/626/A61 Structural parameters of galaxies (Morselli+, 2019)
Spatial distribution of stellar mass and star formation activity at
0.2<z<1.2 across and along the main sequence.
Morselli L., Popesso P., Cibinel A., Oesch P., Montes M., Atek H.,
Illingworth G.D., Holden B.
<Astron. Astrophys. 626, A61 (2019)>
=2019A&A...626A..61M 2019A&A...626A..61M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Morphology
Keywords: galaxies: evolution - galaxies: star formation - galaxies: structure
Abstract:
High-resolution multi-wavelength photometry is crucial to explore the
spatial distribution of star formation in galaxies and understand how
these evolve. To this aim, in this paper we exploit the deep,
multi-wavelength Hubble Space Telescope (HST) data available in the
central parts of the GOODS fields and study the distribution of star
formation activity and mass in galaxies located at different positions
with respect to the Main Sequence (MS) of star-forming galaxies. Our
sample consists of galaxies with stellar mass ≥109.5M☉ in the
redshift range 0.2≤z≤1.2. Exploiting 10-band photometry from the UV
to the near-infrared at HST resolution, we derive spatially resolved
maps of galaxies properties, such as stellar mass and star formation
rate and specific star formation rate, with a resolution of
0.16arcsec. We find that the star formation activity is centrally
enhanced in galaxies above the MS and centrally suppressed below the
MS, with quiescent galaxies (1dex below the MS) characterised by the
highest suppression. The sSFR in the outer region does not show
systematic trends of enhancement or suppression above or below the MS.
The distribution of mass in MS galaxies indicates that bulges are
growing when galaxies are still on the MS relation. Galaxies below the
MS are more bulge-dominated with respect to MS counterparts at fixed
stellar mass, while galaxies in the upper envelope are more extended
and have Sersic indexes that are always smaller than or comparable to
their MS counterparts. The suppression of star formation activity in
the central region of galaxies below the MS hints at inside-out
quenching, as star formation is still ongoing in the outer regions.
Description:
In this work, we exploit multi-wavelength, high-resolution HST imaging
to study the spatially resolved properties of galaxies located in the
central parts of the GOODS fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
param.dat 81 688 Structural parameters of galaxies obtained
from GALFIT
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See also:
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)
Byte-by-byte Description of file: param.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Gal Galaxy ID (from Skelton et al.,
2014, J/ApJS/214/24)
8- 14 F7.3 deg RAdeg Right ascension (J2000)
16- 22 F7.3 deg DEdeg Declination (J2000)
26- 29 F4.2 --- z Best redshift (Momcheva et al., 2016,
Cat. J/ApJS/225/27)
32- 36 F5.3 arcsec reff Effective radius in arcsec
39- 43 F5.3 arcsec e_reff GALFIT error on Effective radius
46- 49 F4.2 --- n Sersic index
52- 55 F4.2 --- e_n GALFIT error on Sersic index
58- 61 F4.2 --- b/a Axis Ratio
64- 67 F4.2 --- e_b/a GALFIT error on axis ratio
70- 75 F6.2 deg PA [-90/90] Position angle
77- 81 F5.2 deg e_PA GALFIT error on position angle
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Acknowledgements:
Laura Morselli, laura.morselli(at)tum.de
(End) Patricia Vannier [CDS] 10-May-2019