A5061497047- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- History of Science and Medicine
- Spectroscopy and Laser Applications
- Historical Astronomy and Related Studies
- Plant Water Relations and Carbon Dynamics
- Marine Invertebrate Physiology and Ecology
- Pulsars and Gravitational Waves Research
- Yersinia bacterium, plague, ectoparasites research
- Astro and Planetary Science
- Plant and animal studies
- Molecular spectroscopy and chirality
- Ocular and Laser Science Research
- Material Science and Thermodynamics
- Scientific Measurement and Uncertainty Evaluation
- CCD and CMOS Imaging Sensors
University of Valparaíso
2018-2024
Federico Santa María Technical University
2023-2024
European Southern Observatory
2016-2023
University of Concepción
2013-2017
Trieste Astronomical Observatory
2017
Trinity House
2014
Osservatorio Astronomico di Padova
2011-2013
University of Groningen
2013
University of Nottingham
2008-2011
European Southern Observatory
2010-2011
Abstract GAs Stripping Phenomena in galaxies with MUSE (GASP) is a new integral-field spectroscopic survey at the VLT aimed studying gas removal processes galaxies. We present an overview of and show first example galaxy undergoing strong stripping. GASP obtaining deep data for 114 z = 0.04–0.07 stellar masses range <?CDATA ${10}^{9.2}\mbox{--}{10}^{11.5}\,{M}_{\odot }$?> different environments (galaxy clusters groups over more than four orders magnitude halo mass). targets optical...
We investigate the effect of ram-pressure from intracluster medium on stripping H i gas in galaxies a massive, relaxed, X-ray bright, galaxy cluster at z = 0.2 Blind Ultra Deep Environmental Survey (BUDHIES). use cosmological simulations, and velocity versus position phase-space diagrams to infer orbital histories galaxies. In particular, we embed simple analytical description simulations identify regions where are more likely have been sufficiently stripped their fall below detection limit...
Galaxies that are being stripped of their gas can sometimes be recognized from optical appearance. Extreme examples galaxies the so-called ``jellyfish galaxies'', exhibit tentacles debris material with a characteristic jellyfish morphology. We have conducted first systematic search for at low-z (z=0.04-0.07) in different environments, selecting varying degrees morphological evidence stripping. visually inspected B and V-band images identified 344 candidates 71 galaxy clusters...
It is well known that galaxies falling into clusters can experience gas stripping due to ram-pressure by the intra-cluster medium (ICM). The most spectacular examples are with extended tails of optically-bright stripped material as "jellyfish". We use first large homogeneous compilation jellyfish in from WINGS and OmegaWINGS surveys, follow-up MUSE observations GASP programme investigate orbital histories reconstruct their history through position vs. velocity phase- space diagrams....
The Southern Photometric Local Universe Survey (S-PLUS) is imaging ~9300 deg^2 of the celestial sphere in twelve optical bands using a dedicated 0.8 m robotic telescope, T80-South, at Cerro Tololo Inter-American Observatory, Chile. telescope equipped with 9.2k by e2v detector 10 um pixels, resulting field-of-view 2 plate scale 0.55"/pixel. survey consists four main subfields, which include two non-contiguous fields high Galactic latitudes (8000 |b| > 30 deg) and areas plane bulge (for an...
Our current understanding of galaxy evolution still has many uncertainties associated with the details accretion, processing, and removal gas across cosmic time. The next generation radio telescopes will image neutral hydrogen (HI) in galaxies over large volumes at high redshifts, which provide key insights into these processes. We are conducting COSMOS HI Large Extragalactic Survey (CHILES) Karl G. Jansky Very Array, is first survey to simultaneously observe from z=0 z~0.5. Here, we report...
Based on MUSE data from the GASP survey, we study Halpha-emitting extraplanar tails of 16 cluster galaxies at z~0.05 undergoing ram pressure stripping. We demonstrate that dominating ionization mechanism this gas (between 64% and 94% Halpha emission in depending diagnostic diagram used) is photoionization by young massive stars due to ongoing star formation (SF) taking place stripped tails. This SF occurs dynamically quite cold HII clumps with a median velocity dispersion sigma = 27 km s^-1....
We investigate the orbital histories of Virgo galaxies at various stages HI gas stripping. In particular, we compare location with different morphology in phase space. This method is a great tool for tracing stripping as they fall into cluster. Most early stage are found first infall region Virgo, while undergoing active mostly appear to be falling or moving out near cluster core time. Galaxies severely stripped, yet symmetric, disks one two locations. Some deep inside cluster, but others...
In a hierarchical Universe clusters grow via the accretion of galaxies from field, groups and even other clusters. As this happens, can lose their gas reservoirs different mechanisms, eventually quenching star-formation. We explore diverse environmental histories through multi-wavelength study combined effect ram-pressure stripping group "processing" in Abell 963, massive growing cluster at $z=0.2$ Blind Ultra Deep HI Environmental Survey (BUDHIES). incorporate hundreds new optical redshifts...
Abstract Within the GASP survey, aimed at studying effect of ram pressure stripping on star formation quenching in cluster galaxies, we analyze here ALMA observations jellyfish galaxy JW100. We find an unexpected large amount molecular gas (∼2.5 × 10 <?CDATA ${M}_{\odot }$?> ), 30% which is located stripped tail out to ∼35 kpc from center. The overall kinematics similar one shown by ionized gas, but for clear signatures double components along direction detected only 2 disk. line ratio r 21...
Ram-pressure stripping by the intracluster medium (ICM) is one of most advocated mechanisms that affect properties cluster galaxies. A recent study based on a small sample has found many galaxies showing strong signatures ram-pressure also possess an active galactic nucleus (AGN), suggesting possible correlation between two phenomena. This result not been confirmed subsequent study. Building upon previous findings, here we combine MUSE observations conducted within GASP program and general...
This paper presents a spatially-resolved kinematic study of the jellyfish galaxy JO201, one most spectacular cases ram-pressure stripping (RPS) in GASP (GAs Stripping Phenomena Galaxies with MUSE) survey. By studying environment we find that it is moving through dense intra-cluster medium Abell 85 at supersonic speeds along our line sight, and likely accompanied by small group galaxies. Given density galaxy's mass, projected position velocity within cluster, estimate JO201 must so far have...
Using the latest cosmological hydrodynamic N-body simulations of groups and clusters, we study how location in phase-space coordinates at $z$$=$$0$ can provide information on environmental effects acting clusters. We confirm results previous authors showing that galaxies tend to follow a typical path as they settle into cluster potential. As such, different regions be associated with times since first infalling cluster. However, addition, see clear trend between total mass loss due tides,...
The so-called jellyfish galaxies are objects exhibiting disturbed morphology, mostly in the form of tails gas stripped from main body galaxy. Several works have strongly suggested ram pressure stripping to be mechanism driving this phenomenon. Here, we focus on one these objects, drawn a sample optically selected galaxies, and use it validate SINOPSIS, spectral fitting code that will used for analysis GASP (GAs Stripping Phenomena with MUSE) survey, study spatial distribution physical...
Jellyfish galaxies in clusters are key tools to understand environmental processes at work dense environments. The advent of Integral Field Spectroscopy has recently allowed study a significant sample stripped the cluster environment z$\sim 0.05$, through GAs Stripping Phenomena with MUSE (GASP) survey. However, optical spectroscopy can only trace ionized gas component H$_{\alpha}$ emission that be spatially resolved on kpc scale this redshift. complex interplay between various phases...
Abstract With MUSE, Chandra , VLA, ALMA, and UVIT data from the GASP program, we study multiphase baryonic components in a jellyfish galaxy (JW100) with stellar mass 3.2 × 10 11 M ⊙ hosting an active galactic nucleus (AGN). We present its spectacular extraplanar tails of ionized molecular gas, UV light, X-ray radio continuum emission. This represents excellent laboratory to interplay between different gas phases star formation influence stripping, heating, AGNs. analyze physical origin...
Using MUSE observations from the GASP survey, we study 54 galaxies undergoing ram-pressure stripping (RPS) spanning a wide range in galaxy mass and host cluster mass. We use this rich sample to how star formation rate (SFR) tails of stripped gas depends on properties its cluster. show that interplay between all parameters involved is complex there not single, dominant one shaping observed amount SFR. Hence, develop simple analytical approach describe fraction SFR tail, as function velocity...
We present VLA HI observations of JO206, a prototypical ram-pressure stripped galaxy in the GASP sample. This massive (M$_{\ast} =$ 8.5 $\times$ 10$^{10}$ M$_{\odot}$) is located at redshift $z 0.0513, near centre low-mass cluster, IIZw108 ($σ\sim575$ km/s). JO206 characterised by long tail ($\geq$90 kpc) ionised gas away ram-pressure. find similarly same direction as and measure total mass $3.2 \times 10^{9}$ M$_{\odot}$. about half expected given stellar surface density JO206. A $1.8...
Exploiting the data from GAs Stripping Phenomena in galaxies with MUSE (GASP) program, we compare integrated Star Formation Rate- Mass relation (SFR-M_ast) of 42 cluster undergoing ram pressure stripping ("stripping galaxies") to that 32 field and undisturbed galaxies. Theoretical predictions have so far led contradictory conclusions about whether can enhance star formation gas disks tails or not until now a statistically significant observed sample was lacking. We find occupy upper envelope...
Jellyfish are cluster galaxies that experience strong ram-pressure effects strip their gas. Their Hα images reveal ionized gas tails up to 100 kpc, which could be hosting ongoing star formation. Here, we report the ultraviolet (UV) imaging observation of jellyfish galaxy JO201 obtained at a spatial resolution ∼1.3 kpc. The intense burst formation happening in tentacles is focus this study. 'UV-brightest galaxy' Abell 85 (z ∼ 0.056) with knots and streams UV. We identify star-forming both...
We present a study of the physical properties JO201, unique disc galaxy with extended tails undergoing extreme ram-pressure stripping (RPS) as it moves through massive cluster Abell 85 at supersonic speeds mostly along line sight. JO201 was observed multi-unit spectroscopic explorer part GASP programme. In previous paper (GASP II) we studied stellar and gas kinematics. this emission-line ratios, gas-phase metallicities, ages populations across tails. find that while emission core is...
Abstract In the context of GAs Stripping Phenomena in galaxies with Muse (GASP) survey, we present characterization JO204, a jellyfish galaxy A957, relatively low-mass cluster <?CDATA $M=4.4\times {10}^{14}\,{M}_{\odot }$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>M</mml:mi> <mml:mo>=</mml:mo> <mml:mn>4.4</mml:mn> <mml:mo>×</mml:mo> <mml:msup> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> <mml:mn>14</mml:mn> </mml:msup> <mml:mspace width="0.25em" />...
GAs Stripping Phenomena in galaxies with MUSE (GASP) is a program aimed at studying gas removal processes nearby different environments. We present the study of four that are part same group (z= 0.06359) and highlight multitude mechanisms affecting spatially resolved properties members. One galaxy passive shows regular stellar kinematics. The analysis its star formation history indicates quenching process lasted for few Gyr declined throughout disk similar way, consistent strangulation....
Galaxy filaments are a peculiar environment, and their impact on the galaxy properties is still controversial. Exploiting data from GAs Stripping Phenomena in galaxies with MUSE (GASP), we provide first characterisation of spatially resolved embedded local Universe. The four focus show ionised gas distributions: Halpha clouds have been observed beyond times effective radius. kinematics, metallicity map ratios emission line fluxes confirm that they do belong to disk, analysis spectra shows...