Browsing Research publications by Title
Now showing items 19515-19534 of 22710
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Star cluster formation and star formation: the role of environment and star-formation efficiencies
(2009)By analyzing global starburst properties in various kinds of starburst and post-starburst galaxies and relating them to the properties of the star cluster populations they form, I explore the conditions for the formation ... -
Star Cluster Formation in Clouds with Externally Driven Turbulence
(2022-11-01)Star clusters are known to be formed in turbulent molecular clouds. How turbulence is driven in molecular clouds and what effect this has on star formation is still unclear. We compare a simulation setup with turbulent ... -
Star clusters near and far; tracing star formation across cosmic time
(2020-06-08)Star clusters are fundamental units of stellar feedback and unique tracers of their host galactic properties. In this review, we will first focus on their constituents, i.e.\ detailed insight into their stellar populations ... -
Star formation and agn activity in interacting galaxies : A near-UV perspective
(2014-01-21)We study nearby galaxies in close pairs to study the key factors affecting star formation and active galactic nuclei (AGN) activity triggered during galaxy interactions. Close pairs are selected from the Sloan Digital Sky ... -
Star Formation and AGN Feedback in the Local Universe: Combining LOFAR and MaNGA
(2022-09-21)The effect of active galactic nuclei (AGN) on their host galaxies – in particular their levels of star formation – remains one of the key outstanding questions of galaxy evolution. Successful cosmological models of galaxy ... -
Star formation and nuclear activity in close pairs of early-type galaxies
(2009-11-01)We extract from the Sloan Digital Sky Survey a sample of 347 systems involving early-type galaxies separated by less than 30 kpc, in projection, and 500 km s−1 in radial velocity. These close pairs are likely progenitors ... -
Star Formation Efficiencies and Star Cluster Formation
(Springer Nature, 2005)Starbursts produce large numbers of Young Star Clusters (YSCs). Multi-color photometry in combination with a dedicated SED analysis tool allows to derive ages, metallicities, EB−V, and masses including 1 uncertainties for ... -
The star formation efficiency in nearby galaxies : measuring where gas forms stars effectively
(2008)We measure the star formation efficiency (SFE), the star formation rate (SFR) per unit of gas, in 23 nearby galaxies and compare it with expectations from proposed star formation laws and thresholds.We use Hi maps from The ... -
Star formation histories in H II galaxies. I. Optical and radio observations
(1997)In this paper we report CCD photometry in broad band B, R, and I colors, as well as in the H , for a sample of eight Hii galaxies with strong radio emission. In addition, we present new radio continuum observations in the ... -
The star formation histories of early-type galaxies : Insights from the rest-frame ultraviolet
(2008-01-30)Our current understanding of the star formation histories of early-type galaxies is reviewed, in the context of recent observational studies of their ultraviolet (UV) properties. Combination of UV and optical spectro-photometric ... -
The star formation history of BCGs to z = 1.8 from the SpARCS/SWIRE survey : evidence for significant in situ star formation at high redshift
(2015-12-01)We present the results of an MIPS-24 μm study of the brightest cluster galaxies (BCGs) of 535 high-redshift galaxy clusters. The clusters are drawn from the Spitzer Adaptation of the Red-Sequence Cluster Survey, which ... -
The star formation history of early-type galaxies
(Instituto de Astronomía, UNAM, 2007)The UV light is an effective tracer for young stars. Base on the recent GALEX UV data of nearby, bright early-type galaxies, we find that 30% of them show a UV flux that is too strong to explain without invoking a 1-3% (in ... -
The star formation history of mass-selected galaxies from the VIDEO survey
(2014-04-01)We measure star formation rates (SFRs) and specific SFRs (SSFRs) of Ks-selected galaxies from the VISTA Deep Extragalactic Observations survey by stacking 1.4 GHz Very Large Array data.We split the sample, which spans 0 < ... -
Star formation in Galactic spiral arms and the interarm regions
(2013-05-11)The line of sight through the Galactic plane between longitudes l = 37deg.83 and 42deg.50 allows for the separation of Galactic Ring Survey molecular clouds into those that fall within the spiral arms and those located in ... -
Star formation in high-redshift quasars : Excess [Oii] emission in the radio-loud population
(2012-12-11)We investigate the [O ii] emission-line properties of 18 508 quasars at z < 1.6 drawn from the Sloan Digital Sky Survey (SDSS) quasar sample. The quasar sample has been separated into 1692 radio-loud and 16 816 radio-quiet ... -
Star formation in quasar hosts and the origin of radio emission in radio-quiet quasars
(2016-02-01)Radio emission from radio-quiet quasars may be due to star formation in the quasar host galaxy, to a jet launched by the supermassive black hole, or to relativistic particles accelerated in a wide-angle radiatively driven ...