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We present a new morphological indicator designed for automated recognition of galaxies with faint asymmetric tidal features suggestive of an ongoing or past merger. We use this new indicator, together with preexisting diagnostics of galaxy…

星系天体物理 · 物理学 2016-01-27 M. M. Pawlik , V. Wild , C. J. Walcher , P. H. Johansson , C. Villforth , K. Rowlands , J. Mendez-Abreu , T. Hewlett

We study the shape and evolution of the star formation main sequence in three independently developed semi-analytic models of galaxy formation. We focus, in particular, on the characterization of the model galaxies that are significantly…

星系天体物理 · 物理学 2019-03-15 Lan Wang , Gabriella De Lucia , Fabio Fontanot , Michaela Hirschmann

We present results from MUSE spatially-resolved spectroscopy of 21 post-starburst galaxies in the centers of 8 clusters from $z\sim0.3$ to $z\sim0.4$. We measure spatially resolved star-formation histories (SFHs), the time since quenching…

Using star formation histories derived from optically resolved stellar populations in nineteen nearby starburst dwarf galaxies observed with the Hubble Space Telescope, we measure the stellar mass surface densities of stars newly formed in…

By using a one-zone chemical and spectrophotometric evolution model of a disk galaxy undergoing a dusty starburst, we investigate, numerically, the optical spectroscopic properties in order to explore galaxy evolution in distant clusters.…

天体物理学 · 物理学 2009-11-06 Yasuhiro Shioya , Kenji Bekki , Warrick J. Couch

Searching in the MaNGA IFU survey, I identify 9 galaxies that have strong Balmer absorption lines and weak nebular emission lines measured from the spectra integrated over the entire IFUs. The spectral features measured from the bulk of the…

星系天体物理 · 物理学 2021-06-02 Po-Feng Wu

Recently, a population of compact main sequence (MS) galaxies exhibiting starburst-like properties have been identified in the GOODS-ALMA blind survey at 1.1mm. Several evolution scenarios were proposed to explain their particular physical…

星系天体物理 · 物理学 2023-04-26 L. Ciesla , C. Gómez-Guijarro , V. Buat , D. Elbaz , S. Jin , M. Béthermin , E. Daddi , M. Franco , H. Inami , G. Magdis , B. Magnelli

The quenching mechanisms of galaxies are not yet fully understood, but post-starburst galaxies provide one explanation for the rapid transition between star-forming and quiescent galaxies. At low redshift, it is generally thought that the…

星系天体物理 · 物理学 2025-08-15 Emma W. Nielsen , Charles L. Steinhardt , Mathieux Harper , Conor McPartland , Aidan Sedgewick

Post-StarBurst (PSB) galaxies are galaxies that have undergone a large burst of star formation followed by rapid quenching. Understanding their properties as a population can help us better understand how galaxies evolve to quiescence. This…

We have determined the O/H and N/O of a sample of 122751 SFGs from the DR7 of the SDSS. For all these galaxies we have also determined their morphology and their SFH using the code STARLIGHT. The comparison of the chemical abundance with…

宇宙学与河外天体物理 · 物理学 2015-06-05 J. P. Torres-Papaqui , R. Coziol , R. A. Ortega-Minakata , D. M. Neri-Larios

The starburst phenomenon can shape the evolution of the host galaxy and the surrounding intergalactic medium. The extent of the evolutionary impact is partly determined by the duration of the starburst, which has a direct correlation with…

The duration of a starburst is a fundamental parameter affecting the evolution of galaxies yet, to date, observational constraints on the durations of starbursts are not well established. Here we study the recent star formation histories…

We present a detailed stellar population analysis of 11 bright ($H<26.6$) galaxies at $z=9-11$ (three spectroscopically confirmed) to constrain the chemical enrichment and growth of stellar mass of early galaxies. We use the flexible…

Stellar population synthesis (SPS) models are a key ingredient of many galaxy evolution studies. Unfortunately, the models are still poorly calibrated for certain stellar evolution stages. Of particular concern is the treatment of the…

Post starburst E+A galaxies are systems that hosted a powerful starburst that was quenched abruptly. Simulations suggest that these systems provide the missing link between major merger ULIRGs and red and dead ellipticals, where AGN…

星系天体物理 · 物理学 2020-04-22 Dalya Baron , Hagai Netzer , Ric I. Davies , J. Xavier Prochaska

We compare atomic gas, molecular gas, and the recent star formation rate (SFR) inferred from H-alpha in the Small Magellanic Cloud (SMC). By using infrared dust emission and local dust-to-gas ratios, we construct a map of molecular gas that…

The centers of bulges are formed dissipationally via gas inflows over short timescales: the 'starburst' mode of star formation (SF). Recent work has shown that detailed observations can be used to separate the stellar mass profile of these…

宇宙学与河外天体物理 · 物理学 2015-05-14 Philip F. Hopkins , Lars Hernquist

Models of poststarburst (or "K+A") galaxies are constructed by combining fully three-dimensional hydrodynamic simulations of galaxy mergers with radiative transfer calculations of dust attenuation. Spectral line catalogs are generated…

宇宙学与河外天体物理 · 物理学 2011-10-24 Gregory F. Snyder , Thomas J. Cox , Christopher C. Hayward , Lars Hernquist , Patrik Jonsson

Post-starbursts (PSBs) are candidate for rapidly transitioning from star-bursting to quiescent galaxies. We study the molecular gas evolution of PSBs at z ~ 0.03 - 0.2. We undertook new CO (2-1) observations of 22 Seyfert PSBs candidates…

星系天体物理 · 物理学 2017-06-21 Hassen M. Yesuf , K. Decker French , S. M. Faber , David C. Koo

We present a new derivation of the star formation history (SFH) of the dSph galaxy Fornax in two central regions, characterised by unprecedented precision and age resolution. It reveals that star formation has proceeded in sharp bursts…

星系天体物理 · 物理学 2021-01-12 V. Rusakov , M. Monelli , C. Gallart , T. K. Fritz , T. Ruiz-Lara , E. J. Bernard , S. Cassisi