We present optical imaging and spectroscopy HI of the Virgo Cluster galaxy IC 3418, which is likely a "smoking gun" example transformation dwarf irregular into elliptical by ram pressure stripping. 3418 has spectacular 17 kpc length UV-bright tail comprised knots, head-tail, linear stellar features. The only H-alpha emission arises from few HII regions in tail, brightest are at heads head-tail UV sources whose tails point toward ("fireballs"). Several elongated have peaks outwardly offset...

For the first time, we reveal large amounts of cold molecular gas in a ram pressure stripped tail, out to large, intracluster distance from galaxy. With APEX telescope have detected 12CO(2-1) emission corresponding more than 10^9 Msun H_2 three Ha bright regions along tail Norma cluster galaxy ESO 137-001, projected 40 kpc disk. 137-001 has an 80 long and X-ray associated with shorter (40 kpc) broader numerous star-forming H II regions. The amount about 1.5x10^8 found most distant region is...

Abstract We present new HST F275W, F475W, and F814W imaging of the region Coma cluster around D100, a spiral galaxy with remarkably long narrow (60 × 1.5 kpc) ram pressure–stripped gas tail. find blue sources coincident H α tail, which we identify as young stars formed in also determine they are likely to be unbound stellar complexes sizes ∼50–100 pc, disperse age. From comparison colors magnitudes simple population models, ages ranging from ∼1 50 Myr masses 10 3 ∼10 5 M ⊙ . that overall...

Previous studies have revealed a population of galaxies in galaxy clusters with ram pressure stripped (RPS) tails gas and embedded young stars. We observed 1.4 GHz continuum HI emission the Very Large Array its B-configuration two fields Coma cluster to study radio properties RPS galaxies. The best sensitivities are 6 8 $μ$Jy per 4'' beam respectively, which 4 3 times deeper than those previously published. Radio found 10 (8 new) out 20 galaxies, unambiguously revealing presence relativistic...

We present the first high-resolution map of cold molecular gas distribution, as traced by CO(2-1) emission with ALMA, in a prominent ram pressure stripped tail. The Norma cluster galaxy ESO 137-001 is undergoing strong interaction surrounding intra-cluster medium and one nearest jellyfish galaxies long multi-phase have mapped full extent tail at 1" (350 pc) angular resolution found rich distribution mostly compact CO regions extending to nearly 60 kpc length 25 width. In total about 10^9...

High resolution (1'' $\times$ 2'') ALMA CO(2-1) observations of the ram pressure stripped galaxy NGC 4402 in Virgo cluster show some clearest evidence yet for impacts on molecular ISM a galaxy. The eastern side at $r \sim 4.5$ kpc, upon which is incident, has large (width $\sim$1 height kpc above disk midplane) extraplanar plume gas and dust. Molecular region shows distinct non-circular motions direction pressure; kinematic offset up to 60 km s$^{-1}$ consistent with acceleration by...

Aims.The influence of a time-varying ram pressure on spiral galaxies in clusters is explored with new simulation method based the N-body SPH/tree code GADGET.

We have discovered large amounts of molecular gas, as traced by CO emission, in the ram pressure stripped gas tail Coma cluster galaxy D100 (GMP 2910), out to distances about 50 kpc. has a 60 kpc long, strikingly narrow which is bright X-rays and H{\alpha}. Our observations with IRAM 30m telescope reveal total ~ 10^9 M_sun H_2 (assuming standard CO-to-H_2 conversion) several regions along tail, thus indicating that may dominate its mass. Along we measure smooth gradient radial velocity...

We investigate the effects of ram pressure on molecular ISM in disk Coma cluster galaxy NGC 4921, via high resolution CO observations. present 6" CARMA CO(1-0) observations full disk, and 0.4" ALMA CO(2-1) leading quadrant, where is strongest. find evidence for compression dense interstellar medium (ISM) side, spatially correlated with intense star formation activity this zone. also detect gas along kiloparsec-scale filaments dust extending into otherwise stripped zone galaxy, seen HST...

The removal of gas by ram pressure stripping galaxies is treated a purely kinematic description. solution has two asymptotic limits: if the duration pulse exceeds period vertical oscillations perpendicular to galactic plane, commonly used quasi-static criterion Gunn & Gott obtained which uses maximum that galaxy experienced along its orbit. For shorter pulses outcome depends on time-integrated pressure. This parameter pair fully describes mass fraction stripped from given galaxy. approach...

ABSTRACT When galaxies move through the intracluster medium (ICM) inside galaxy clusters, ram pressure of ICM can strip gas from galaxies. The stripped forms tails on trailing side. These are hence dubbed ‘jellyfish galaxies’. ESO 137-001 is a quintessential jellyfish located in nearest rich cluster, Norma cluster. Its spectacular multiphase tail has complex morphology and kinematics both imprinted galaxy’s interstellar (ISM) as result interactions between surrounding hot plasma, mediated by...

<i>Context. <i/>Ram pressure stripping of galaxies in clusters can yield gas deficient disks. Previous numerical simulations based on various approaches suggested that, except for near edge-on disk orientations, the amount depends very little inclination angle.<i>Aims. <i/>Following our previous and analytical study face-on stripping, we extend set parameters with tilt angle explore detail effects ram interstellar content (ISM) tilted that orbit environments clusters, compact or extended...

We present IRAM 30m sensitive upper limits on CO emission in the ram pressure stripped dwarf Virgo galaxy IC3418 and a few positions covering HII regions its prominent 17 kpc UV/Ha gas-stripped tail. In central arcseconds of galaxy, we report possible marginal detection about 1x10^6 M_sun molecular gas (assuming Galactic CO-to-H_2 conversion factor) that could correspond to surviving nuclear reservoir. estimate there is less main body IC3418, by at least factor 20, than would be expected...

ABSTRACT Ram pressure stripping (RPS) is an important process to affect the evolution of cluster galaxies and their surrounding environment. We present a large MUSE mosaic for ESO 137-001 its stripped tails, study detailed distributions kinematics ionized gas stars. The warm, detected at least 87 kpc from galaxy splits into three tails. There clear velocity gradient roughly perpendicular direction, which decreases along tails disappears beyond ∼45 downstream. dispersion increases ∼80 km s−1...

Recent studies have highlighted the potential significance of intracluster medium (ICM) clumping and its important implications for cluster cosmology baryon physics. Many ICM clumps can originate from infalling galaxies, as stripped interstellar (ISM) mixing into hot ICM. However, a direct connection between ISM has not been unambiguously established before. Here we present discovery first still only known isolated cloud (or orphan cloud, OC) detected in both X-rays H$\alpha$ nearby Abell...

Isolated HI clouds with no optical counterparts are often taken as evidence for galaxy-galaxy interactions, though an alternative hypothesis is that these primordial 'dark galaxies' which have not formed stars. Similarly, certain kinematic features in streams also controversial, sometimes of dark galaxies but perhaps explicable the result harassment. We numerically model passage a galaxy through gravitational field cluster. The consists SPH particles gas and n-bodies stars matter, while...

13CO(J = 2–1) and C18O(J observations of the molecular cloud G285.90+4.53 (Cloud 16) in Carina Flare supershell (GSH287+04-17) with APEX telescope are presented. With an algorithm DENDROFIND we identify 51 fragments compute their sizes masses. We discuss mass spectrum interpret it as being result shell fragmentation process described by pressure assisted gravitational instability – PAGI. conclude that explanation clump function needs a combination gravity external to shell.

The existence of long (>100 kpc) H i streams and small (<20 free-floating clouds is well known. While the formation has been investigated extensively, isolated are often purported to be interaction debris, little research done on optically dark that not part a larger stream. One possibility such features result from fragmentation more extended streams, while another idea they primordial, galaxies. We test validity scenario (via harassment) using numerical simulations. In order compare our...

Ram pressure stripping (RPS) is an important mechanism for galaxy evolution. In this work, we present results from HST and APEX observations of one RPS galaxy, ESO 137-002 in the closest rich cluster Abell 3627. The known to host prominent X-ray H$\alpha$ tails. data reveal significant features indicative including asymmetric distribution dust filaments clouds ablation generally aligned with direction ram pressure, young star clusters immediately upstream residual that suggest formation (SF)...

We present the results from HST WFC3 and ACS data on an archetypal galaxy undergoing ram pressure stripping (RPS), ESO 137-001, in nearby cluster Abell 3627. 137-001 is known to host a prominent stripped tail detected many bands X-rays, Halpha CO. The reveal significant features indicative of RPS such as asymmetric dust distribution surface brightness well blue young star complexes tail. study correlation between HST, HII regions (MUSE) dense molecular clouds CO (ALMA). clusters very good,...

Abstract Although many galaxies in the Virgo cluster are known to have lost significant amounts of H i gas, only about a dozen features where extends significantly outside its parent galaxy. Previous numerical simulations predicted that removed by ram pressure stripping should column densities far excess sensitivity limits observational surveys. We construct simple model try and quantify how streams we might expect detect. This accounts for expected random orientation position velocity space...

Ram-pressure stripping of the spiral galaxy ESO 137−001 within highly dynamical intracluster medium (ICM) Norma cluster lead to spectacular extraplanar CO, optical, H α , UV, and X-ray emission. The tails extend up 80 kpc from galactic disk. We present simulations ram-pressure event, investigate physics stripped gas its ability form stars. also use these predict I maps constrain orbit cluster. Special care was taken for diffuse gas. In a new approach, we analytically estimate mixing between...

ABSTRACT Galaxy clusters grow primarily through the continuous accretion of group-scale haloes. Group galaxies experience preprocessing during their journey into clusters. A star-bursting compact group, Blue Infalling (BIG), is plunging nearby cluster A1367. Previous optical observations reveal rich tidal features in BIG members, and a long H α trail behind. Here, we report discovery projected ∼250 kpc X-ray tail behind using Chandra XMM–Newton observations. The total hot gas mass ∼7 × 1010...