GASP XXXV: Characteristics of the Diffuse Ionised Gas in Gas-stripped Galaxies
Neven Tomičić,Benedetta Vulcani,Bianca M. Poggianti,Ariel Werle,Ancla Müller,Matilde Mingozzi,Marco Gullieuszik,Anna Wolter,Mario Radovich,Alessia Moretti,Andrea Franchetto,Callum Bellhouse,Jacopo Fritz +12 more
Reads0
Chats0
TLDR
In this article, the authors used optical IFU observations of 71 gas-stripped and control galaxies from the Gas Stripping Phenomena in galaxies (GASP) survey, to analyze the gas properties of the dense ionized gas and the DIG, such as metallicity, ionization parameter log(q), and the difference between the measured log[OI]/H\alpha$ and the value predicted by star-forming models.Abstract:
The diffuse ionized gas (DIG) is an important component of the interstellar medium that can provide insights into the different physical processes affecting the gas in galaxies. We utilise optical IFU observations of 71 gas-stripped and control galaxies from the Gas Stripping Phenomena in galaxies (GASP) survey, to analyze the gas properties of the dense ionized gas and the DIG, such as metallicity, ionization parameter log(q), and the difference between the measured $\log[OI]/H\alpha$ and the value predicted by star-forming models, given the measured log[OIII]/H$\beta$ ($\Delta log[OI]/H\alpha$). We compare these properties at different spatial scales, among galaxies at different gas-stripping stages, and between disks and tails of the stripped galaxies. The metallicity is similar between the dense gas and DIG at a given galactocentric radius. The log(q) is lower for DIG compared to dense gas. The median values of log(q) correlate best with stellar mass, and the most massive galaxies show an increase in log(q) toward their galactic centers. The DIG clearly shows higher $\Delta log[OI]/H\alpha$ values compared to the dense gas, with much of the spaxels having LIER/LINER like emission. The DIG regions in the tails of highly stripped galaxies show the highest $\Delta log[OI]/H\alpha$, exhibit high values of log(q) and extend to large projected distances from star-forming areas (up to 10 kpc). We conclude that the DIG in the tails is at least partly ionized by a process other than star-formation, probably by mixing, shocks and accretion of inter-cluster and interstellar medium gas.read more
Citations
More filters
Journal ArticleDOI
Observing Ram Pressure at Work in Intermediate Redshift Clusters with MUSE: The Case of Abell 2744 and Abell 370
TL;DR: In this paper , the authors describe how they discovered and characterized 13 ram-pressure stripped galaxies in the central regions of two intermediate redshift (z$\sim$0.3-0.4) clusters, A2744 and A370, using the MUSE spectrograph.
Journal ArticleDOI
UV and Hα HST Observations of Six GASP Jellyfish Galaxies
Marco Gullieuszik,Eric Giunchi,Bianca M. Poggianti,Alessia Moretti,Claudia Scarlata,Daniela Calzetti,A. Werle,Anita Zanella,Mario Radovich,Callum Bellhouse,D. Bettoni,Andrea Franchetto,Jacopo Fritz,Y. Jaff'e,Sean L. McGee,Matilde Mingozzi,Alessandro Omizzolo,Stephanie Tonnesen,Marc Verheijen,Benedetta Vulcani +19 more
TL;DR: In this paper , the authors used a combination of broadband (UV to I) filters and a narrowband Hα filter to detect star-forming clumps in the tails and disks of six jellyfish galaxies from the GASP survey.
Journal ArticleDOI
Ultraviolet imaging observations of three jellyfish galaxies: star formation suppression in the centre and ongoing star formation in stripped tails
Koshy George,Bianca M. Poggianti,Neven Tomičić,Joseph E. Postma,Patrick Côté,Jacopo Fritz,S. K. Ghosh,Marco Gullieuszik,J. B. Hutchings,Alessia Moretti,Alessandro Omizzolo,Mario Radovich,P. Sreekumar,Annapurni Subramaniam,S. N. Tandon,Benedetta Vulcani +15 more
TL;DR: In this paper , the ultraviolet imaging observations of jellyfish galaxies provide an opportunity to understand ongoing star formation in the stripped tails of the galaxies, and they detect knots of star formation on the disc and tails of these galaxies.
Journal ArticleDOI
MUSE crowded field 3D spectroscopy in NGC 300
TL;DR: In this paper , the authors compared the physical properties of HII and DIG in terms of metallicity, density, extinction, and kinematics, and performed a comparative analysis of the properties of DIG.
Journal ArticleDOI
HST Imaging of Star-forming Clumps in Six GASP Ram-pressure-stripped Galaxies
Eric Giunchi,Marco Gullieuszik,Bianca M. Poggianti,Alessia Moretti,A. Werle,Claudia Scarlata,Anita Zanella,Benedetta Vulcani,Daniela Calzetti +8 more
TL;DR: In this article , the star-forming clumps of six galaxies of the GASP sample undergoing strong ram pressure stripping are detected in Hα and near-UV, tracing star formation on different timescales.
References
More filters
Journal ArticleDOI
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
TL;DR: In this article, a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed, is presented.
Journal ArticleDOI
Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
TL;DR: In this paper, the authors presented a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed.
Journal ArticleDOI
The relationship between infrared, optical, and ultraviolet extinction
TL;DR: In this article, the average extinction law over the 3.5 micron to 0.125 wavelength range was derived for both diffuse and dense regions of the interstellar medium. And the validity of the law over a large wavelength interval suggests that the processes which modify the sizes and compositions of grains are stochastic in nature.
Journal ArticleDOI
Astropy: A community Python package for astronomy
Thomas P. Robitaille,Erik Tollerud,Perry Greenfield,Michael Droettboom,Erik Bray,Tom Aldcroft,Matt Davis,Adam Ginsburg,Adrian M. Price-Whelan,Wolfgang Kerzendorf,A. Conley,Neil H. M. Crighton,Kyle Barbary,Demitri Muna,Henry C. Ferguson,Frédéric Grollier,Madhura Parikh,Prasanth H. Nair,Hans Moritz Günther,Christoph Deil,Julien Woillez,Simon Conseil,Roban Kramer,J. Turner,Leo Singer,R. T. Fox,Benjamin A. Weaver,Victor Zabalza,Zachary I. Edwards,K. Azalee Bostroem,Douglas Burke,Andrew R. Casey,Steven M. Crawford,Nadia Dencheva,Justin Ely,Tim Jenness,Kathleen Labrie,Pey Lian Lim,Francesco Pierfederici,Andrew Pontzen,Andy Ptak,Brian L. Refsdal,Mathieu Servillat,Ole Streicher +43 more
TL;DR: Astropy as discussed by the authors is a Python package for astronomy-related functionality, including support for domain-specific file formats such as flexible image transport system (FITS) files, Virtual Observatory (VO) tables, common ASCII table formats, unit and physical quantity conversions, physical constants specific to astronomy, celestial coordinate and time transformations, world coordinate system (WCS) support, generalized containers for representing gridded as well as tabular data, and a framework for cosmological transformations and conversions.
Journal ArticleDOI
Galactic stellar and substellar initial mass function
TL;DR: A review of the present-day mass function and initial mass function in various components of the Galaxy (disk, spheroid, young, and globular clusters) and in conditions characteristic of early star formation is presented in this paper.