On the influence of ram-pressure stripping on the star formation of simulated spiral galaxies

By T. Kronberger, Wolfgang Kapferer, Chiara Ferrari, S. Unterguggenberger, Sabine Schindler. 2008

135 citations recorded by the source corpus.

Aims. We investigate the influence of ram-pressure stripping on the star formation and the mass distribution in simulated spiral galaxies. Special emphasis is put on the question of where the newly formed stars are located. The stripping radius from the simulation is compared to analytical estimates. Methods. Disc galaxies are modelled in combined N-body/hydrodynamic simulations (GADGET-2) with prescriptions for cooling, star formation, stellar feedback, and galactic winds. These model galaxies move through a constant density and temperature gas, which has parameters comparable to the intra-cluster medium (ICM) in the outskirts of a galaxy cluster (T = 3k eV≈ 3.6 × 10 7 K and ρ = 10 −28 g/cm 3 ). With this numerical setup we analyse the influence of ram-pressure stripping on the star formation rate of the model galaxy. Results. We find that the star formation rate is significantly enhanced by the ram-pressure effect (up to a factor of 3). Stars form in the compressed central region of the galaxy, as well as in the stripped gas behind the galaxy. Newly formed stars can be found up to hundred kpc behind the disc, forming structures with sizes of roughly 1 kpc in diameter and with masses of up to 10 7 M� .A s they do not possess a dark matter halo due to their formation history, we name them “stripped baryonic dwarf” galaxies. We also find that the analytical estimate for the stripping radius from a Gunn & Gott (1972) criterion agrees well with the numerical value from the simulation. Like in former investigations, edge-on systems lose less gas than face-on systems, and the resulting spatial distribution of the gas and the newly formed stars is different.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering, Instrumentation

View Paper: https://www.semanticscholar.org/paper/508e25b348a8c5497c2136a2888dfdb5a3a461c2

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Citations in the corpus

The role of cold gas and environment on the stellar mass-metallicity relation of nearby galaxies (2012, methodology): “This value is purely an approximation given that the stripping radius found in galaxy models varies depending on the model ingredients and are often around 11−15 kpc in a galaxy with semimajor axis of 25 kpc (Kronberger et al. 2008; Tonnesen & Bryan 2009).”
A DOZEN NEW GALAXIES CAUGHT IN THE ACT: GAS STRIPPING AND EXTENDED EMISSION LINE REGIONS IN THE COMA CLUSTER (2010, unknown): “Recent numerical simulations of ram-pressure stripping (Kronberger et al. 2008; Kapferer et al. 2009; Tonnesen & Bryan 2010) also showed the evolution of Hα appearance in ∼ 500 Myr.”
The effect of ram pressure on the star formation, mass distribution and morphology of galaxies (2009, methodology): “Recent numerical studies (Kronberger et al. 2008) showed that ram pressure does enhance the star formation in a galaxy.”
Ram-pressure stripping of halo gas in disc galaxies: implications for galactic star formation in different environments (2009, background): “Numerical results by Kronberger et al. (2008) and by the present study are consistent with each other in that they show more efficient stripping of disk gas in outer parts of gas disks: star formation might well be truncated outside-in.”
MUSE sneaks a peek at extreme ram-pressure stripping events - I. A kinematic study of the archetypal galaxy ESO137-001 (2014, background): “…(e.g. Gunn & Gott 1972; Nulsen 1982; Moore et al. 1996; Quilis et al. 2000; Schulz & Struck 2001; Vollmer et al. 2001a; Bekki & Couch 2003; Kronberger et al. 2008; Tonnesen & Bryan 2010; Ruszkowski et al. 2014), these pculiar systems are in fact ideal laboratories to constrain the…”
GAS STRIPPING IN SIMULATED GALAXIES WITH A MULTIPHASE INTERSTELLAR MEDIUM (2009, unknown): “More recently, Kronberger et al (2008) have modeled cooling in the context of star formation.”