Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys

Moffett, Amanda J.; Phillipps, S.; Robotham, Aaron S. G.; Driver, Simon P.; Bremer, M. N.; Cortese, Luca; Wong, O. I.; Brough, Sarah; Brown, M. J. I.; Bryant, Julia J.; Conselice, Christopher J.; Croom, S. M.; George, Koshy; Goldstein, G.; Goodwin, Michael; Holwerda, Benne W.; Hopkins, A. M.; Konstantopoulos, I. S.; Lawrence, Jon; Lorente, Nuria P. F.; Medling, Anne M.; Owers, Matt S.; Pimbblet, Kevin A.; Richards, Samuel N.; Sweet, Sarah M.; Sande, Jesse van de

doi:10.1093/mnras/stz2237

Cited by 16 publications

(9 citation statements)

References 92 publications

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“…Previous studies of the blue spheroid (BSph) galaxies (Kannappan et al 2009;Schawinski et al 2009;Mahajan et al 2018;Moffett et al 2019) or Luminous Compact Blue (LCB) galaxies (Noeske et al 2006) revealed a population of the blue compact galaxies that found between z = 0 and z = 1, which are the candidates of the low-mass quiescent galaxy progenitor. This blue compact galaxy population is very likely to overlap with the UV compact galaxies we found here directly from the HDUV image.…”

Section: Origin and Evolution Of The Uv Compact Galaxymentioning

confidence: 99%

UV and NIR size of the low-mass field galaxies: the UV compact galaxies

Cheng

Xie

et al. 2020

A&A

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Context. Most of the massive star-forming galaxies are found to have 'inside-out' stellar mass growth modes, which means the inner parts of the galaxies mainly consist of the older stellar population, while the star forming in the outskirt of the galaxy is still ongoing. Aims. The high-resolution HST images from Hubble Deep UV Legacy Survey (HDUV) and Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) projects with the unprecedented depth in both F275W and F160W bands are the perfect data sets to study the forming and formed stellar distribution directly. Methods. We selected the low redshift (0.05 < z spec < 0.3) galaxy sample from the GOODS-North field where the HST F275W and F160W images are available. Then we measured the half light radius in F275W and F160W bands, which are the indicators of the star formation and stellar mass. Results. By comparing the F275W and F160W half light radius, we find the massive galaxies are mainly follow the 'inside-out' growth mode, which is consistent with the previous results. Moreover, the HST F275W and F160W images reveal that some of the low-mass galaxies (< 10 8 M ⊙ ) have the 'outside-in' growth mode: their images show a compact UV morphology, implying an ongoing star formation in the galaxy centre, while the stars in the outskirts of the galaxies are already formed. The two modes transit smoothly at stellar mass range about 10 8−9 M ⊙ with a large scatter. We also try to identify the possible neighbour massive galaxies from the SDSS data, which represent the massive galaxy sample. We find that all of the spec-z selected galaxies have no massive galaxy nearby. Thus the 'outside-in' mode we find in the low-mass galaxies are not likely originated from the environment.

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Section: Origin and Evolution Of The Uv Compact Galaxymentioning

confidence: 99%

UV and NIR size of the low-mass field galaxies: the UV compact galaxies

Cheng

Xie

et al. 2020

A&A

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“…The final classification was determined by the majority opinion. This classification has been used in various studies, such as Kelvin et al (2014bKelvin et al ( , 2018, Agius et al (2013), Moffett et al (2019), Mahajan et al (2020), andBellstedt et al (2020).…”

Section: Sample Selectionmentioning

confidence: 99%

Star-forming early-type galaxies and quiescent late-type galaxies in the local Universe

Paspaliaris

Xilouris

Nersesian

et al. 2022

A&A

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Aims. The general consensus is that late-type galaxies undergo intense star-formation, activity while early-type galaxies are mostly inactive. We question this general rule and investigate the existence of star-forming early-type and quiescent late-type galaxies in the local Universe. By computing the physical properties of these galaxies and by using information on their structural properties as well as the density of their local environment, we seek to understand the differences from their 'typical' counterparts. Methods. We made use of the multi-wavelength photometric data (from the ultraviolet to the sub-millimetre), for 2,209 morphologically classified galaxies in the Galaxy And Mass Assembly survey. Furthermore, we separated the galaxies into subsets of star-forming and quiescent based on their dominant ionising process, making use of established criteria based on the W Hα width and the [N II /Hα] ratio. Taking advantage of the spectral energy distribution fitting code CIGALE, we derived galaxy properties, such as the stellar mass, dust mass, and star-formation rate, and we also estimated the unattenuated and the dust-absorbed stellar emission, for both the young (≤ 200 Myr) and old (> 200 Myr) stellar populations. Results. We find that about 47% of E/S0 galaxies in our sample show ongoing star-formation activity and 8% of late-type galaxies are quiescent. The star-forming elliptical galaxies, together with the little blue spheroids, constitute a population that follows the starforming main sequence of spiral galaxies very well. The fraction of the luminosity originating from young stars in the star-forming early-type galaxies is quite substantial (∼ 25%) and similar to that of the star-forming late-type galaxies. The stellar luminosity absorbed by the dust (and used to heat the dust grains) is highest in star-forming E/S0 galaxies (an average of 35%) followed by starforming Sa-Scd galaxies (27%) with this fraction becoming significantly smaller for their quiescent analogues (6% and 16%, for E/S0 and Sa-Scd, respectively). Star-forming and quiescent E/S0 galaxies donate quite different fractions of their young stellar luminosities to heat up the dust grains (74% and 36%, respectively), while these fractions are very similar for star-forming and quiescent Sa-Scd galaxies (59% and 60%, respectively). Investigating possible differences between star-forming and quiescent galaxies, we find that the intrinsic (unattenuated) shape of the SED of the star-forming galaxies is, on average, very similar for all morphological types. Concerning their structural parameters, quiescent galaxies tend to show larger values of the r-band Sérsic index and larger effective radii (compared to star-forming galaxies). Finally, we find that star-forming galaxies preferably reside in lower density environments compared to the quiescent ones, which exhibit a higher percentage of sources being members of groups.

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“…The Galaxy Zoo sample of Green Peas has generated extensive followup work as sources of Lyman-continuum leakage (Yang et al 2017, Malkan & Malkan 2021, Lyman α emission sources (Orlitová et al 2018), extreme starbursts driving global winds (Jaskot et al 2017, Bosch et al 2019, Hogarth et al 2020, and testbeds for chemical evolution scenarios at high star-formation rates (Hawley 2012, Amorín et al 2012). These compact, intense starbursts are likely related to the less massive "Little Blue Spheroids" (Moffett et al 2019).…”

Section: Galaxy Zoo: Green Peasmentioning

confidence: 99%

Gems of the Galaxy Zoos -- a Wide-Ranging Hubble Space Telescope Gap-Filler Program

Keel,

Tate,

Wong

et al. 2022

Preprint

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We describe the Gems of the Galaxy Zoos (Zoo Gems) project, a gap-filler project using short windows in the Hubble Space Telescope's schedule. As with previous snapshot programs, targets are taken from a pool based on position; we combine objects selected by volunteers in both the Galaxy Zoo and Radio Galaxy Zoo citizen-science projects. Zoo Gems uses exposures with the Advanced Camera for Surveys (ACS) to address a broad range of topics in galaxy morphology, interstellar-medium content, host galaxies of active galactic nuclei, and galaxy evolution. Science cases include studying galaxy interactions, backlit dust in galaxies, post-starburst systems, rings and peculiar spiral patterns, outliers from the usual color-morphology relation, Green Pea compact starburst systems, double radio sources with spiral host galaxies, and extended emission-line regions around active galactic nuclei. For many of these science categories, final selection of targets from a larger list used public input via a voting process. Highlights to date include the prevalence of tightly-wound spiral structure in blue, apparently early-type galaxies, a nearly complete Einstein ring from a group lens, redder components at lower surface brightness surrounding compact Green Pea starbursts, and high-probability examples of spiral galaxies hosting large double radio sources.

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Star-forming, rotating spheroidal galaxies in the GAMA and SAMI surveys

Cited by 16 publications

References 92 publications

UV and NIR size of the low-mass field galaxies: the UV compact galaxies

UV and NIR size of the low-mass field galaxies: the UV compact galaxies

Star-forming early-type galaxies and quiescent late-type galaxies in the local Universe

Gems of the Galaxy Zoos -- a Wide-Ranging Hubble Space Telescope Gap-Filler Program

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