Pre-Processing of Galaxies before Entering a Cluster

By Y. Fujita. 2003

162 citations recorded by the source corpus.

We consider several mechanisms that possibly affect the evolution of disk galaxies in clusters using analytical models based on a hierarchical clustering scenario. We especially focus on the evolution of disk galaxies in subclusters located around a main cluster. We show that ram-pressure stripping cannot be always ignored in subclusters, although their masses are much smaller than that of the main cluster. The star-formation rate of a galaxy may gradually decrease by the stripping of warm gas (`strangulation') in a main cluster. However, we find that ram-pressure stripping could start before the strangulation is completed, if a field galaxy directly falls into the main cluster. Since this conflicts with some recent observations, many galaxies might have been affected by some environmental effects when they were in subclusters before they fell into the main cluster (`pre-processing'). We show that strangulation and evaporation of the cold gas by the surrounding hot ICM in subclusters are the possible candidates. We also show that the observed morphological transformation of disk galaxies at z ~< 1 is not chiefly due to galaxy mergers.

Subfields: Astronomy and Astrophysics, Instrumentation, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/1abad0444e7dde3a8ad4f7df1f2bf801f0846f0f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. C. Conroy
2. Richard S. Ellis
3. P. V. van Dokkum
4. L. Hernquist
5. P. Hopkins
6. T. Treu
7. Christopher J. Conselice
8. R. Dav'e

In Instrumentation

1. C. Conroy
2. Richard S. Ellis
3. P. V. van Dokkum
4. T. Treu
5. L. Hernquist
6. M. Cappellari
7. P. Hopkins
8. John Moustakas

In Statistical and Nonlinear Physics

1. C. Conroy
2. Richard S. Ellis
3. T. Treu
4. P. V. van Dokkum
5. John Moustakas
6. M. Blanton
7. A. Romanowsky
8. Keiichi Umetsu

Citations in the corpus

• LoCuSS: THE SLOW QUENCHING OF STAR FORMATION IN CLUSTER GALAXIES AND THE NEED FOR PRE-PROCESSING (2015, background): “…mechanism by which galaxies may be transformed at large distances from the cluster center is through “pre-processing” in infalling galaxy groups (e.g., Zabludoff et al. 1996; Zabludoff & Mulchaey 1998; Kodama et al. 2001; Fujita 2004; Berrier et al. 2009; McGee et al. 2009; Dressler et al. 2013).”
• A HIGH STELLAR VELOCITY DISPERSION AND ∼100 GLOBULAR CLUSTERS FOR THE ULTRA-DIFFUSE GALAXY DRAGONFLY 44 (2016, background): “…UDGs are “failed” galaxies that were prevented from building a normal stellar population, because of extreme feedback from supernovae and young stars (Agertz & Kravtsov 2015; Calura et al. 2015), gas stripping (Fujita 2004; Yozin & Bekki 2015), AGN feedback (Reines et al. 2013), or other effects.”
• The Build-up of the Colour-Magnitude Relation (2005, background): “…and clusters are dominated by red galaxies and supports the idea that clusterspecific mechanisms have not played major roles in transforming galaxy properties (Kodama et al. 2001a; Balogh et al. 2004a,b; De Propris et al. 2004; Tanaka et al. 2004, but see also Fujita 2004; Fujita & Goto 2004).”
• A Wide-Field Survey of Two z ~ 0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s (2007, methodology): “The predicted timescale for cessation of star formation under starvation is consistent with our observed decline over 0.5 − 2 Gyr (Fujita 2004); in simulations by Okamoto & Nagashima (2003), a timescale of 1–2 Gyr for the halt in star formation after gas removal provided a good fit to observations.”
• Diffuse Optical Light in Galaxy Clusters. II. Correlations with Cluster Properties (2007, result): “This is also consistent with current simulations (Willman et al. 2004; Fujita 2004; Gnedin 2003b; Rudick et al. 2006; Sommer-Larsen 2006, and references therein).”
• Physical properties and environments of nearby galaxies (2009, background): “…difficult to make quantitative comparisons with theory, the observations favor an important role for so-called pre-processing of galaxies in groups, possibly by mergers (Mihos 2004), by gasdynamical interactions with warm or hot gas (Fujita 2004), or by tidal harassment (Moore, Lake & Katz 1998).”
• 266 E+A galaxies selected from the Sloan Digital Sky Survey Data Release 2: the origin of E+A galaxies (2005, background): “…& Bower 1999; Fujita & Nagashima 1999; Quilis, Moore & Bower 2000; Fujita 2004; Fujita & Goto 2004) may first accelerate star formation of cluster galaxies and later turn it off as well as tides from the cluster potential (e.g., Fujita 1998) and the evaporation of the cold gas (e.g., Fujita 2004).”