I split the star-forming sample into high and intermediate activity galaxies. The SMF of COSMOS2015 star-forming galaxies shows modest evolution, whereas the SMF of COSMOS2015 quiescent subsample shows mass assembly of low and intermediate-mass galaxies at z < 1, consistent with the downsizing effect.
#Ram pressure stripping full
I analyze the evolution of the SMF and stellar mass density, and show the mass-dependent evolution of the SMF of COSMOS2015 full sample, sharpening of the knee of the SMF at the high-mass end around the characteristic stellar mass M*.
#Ram pressure stripping code
I develop a Python code for fitting the SMF and obtaining the best-fit parameters of the model and their uncertainties, using the MCMC.
the redshift range covered by the future Euclid Mission. I test the pipeline and derive the SMF and SMF fit of the Flagship mock galaxies and COSMOS2015 galaxies over the redshift range 0.2 < z < 2.5, i.e. I present my work on developing a Python pipeline for deriving the stellar mass function (SMF) of cluster galaxies, using the 1/Vmax method and fitting the SMF with a chosen model (variations of the Schechter function), for the upcoming Euclid Mission. The green dashed curve corresponds to equation (7) with α = 2 but with a time delay factor that accounts for how long it takes the for galaxy to respond to ram pressure stripping (i.e., approximately a sound crossing time), as discussed in the text. In both the top and bottom panels the horizontal dotted lines correspond to the predictions of equation (7) for α = 2, 4, 6, 8, and 10 (bottom to top). Thus, the ram pressure is the same for both cases in the bottom panel. In the bottom panel, the same galaxy is run through two different media: the thick red curve corresponds to the case where the background density is the same as in the top panel, but the velocity is 760 km s −1, while the thin red curve corresponds to the case where the velocity is 1000 km s −1 but the density is a factor of (1000/760) 2 times lower than in the top panel. The solid red and dashed blue curves show the bound mass of gas and dark matter (respectively) in the simulation. In the top panel, a galaxy of mass M 200 = 4 × 10 12 M is run through a uniform gaseous medium of density 100f b ρ crit at a velocity of 1000 km s −1. An example of ram pressure stripping in the uniform medium simulations.
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