GASP. I. Gas Stripping Phenomena in Galaxies with MUSE

Abstract

GASP (GAs Stripping Phenomena in galaxies with MUSE) is a new integral-field spectroscopic survey with MUSE at the VLT aiming at studying gas removal processes in galaxies. We present an overview of the survey and show a first example of a galaxy undergoing strong gas stripping. GASP is obtaining deep MUSE data for 114 galaxies at z=0.04-0.07 with stellar masses in the range 10 9.2 -10 11.5 M in different environments (galaxy clusters and groups, over more than four orders of magnitude in halo mass). GASP targets galaxies with optical signatures of unilateral debris or tails reminiscent of gas stripping processes ("jellyfish galaxies"), as well as a control sample of disk galaxies with no morphological anomalies. GASP is the only existing Integral Field Unit (IFU) survey covering both the main galaxy body and the outskirts and surroundings, where the IFU data can reveal the presence and the origin of the outer gas. To demonstrate GASP's ability to probe the physics of gas and stars, we show the complete analysis of a textbook case of a "jellyfish" galaxy, JO206. This is a massive galaxy (9 × 10 10 M ) in a low-mass cluster (σ ∼ 500 km s −1 ), at a small projected clustercentric radius and a high relative velocity, with ≥90kpc-long tentacles of ionized gas stripped away by ram pressure. We present the spatially resolved kinematics and physical properties of gas and stars, and depict the evolutionary history of this galaxy.

Erratum: “GASP. VII. Signs of Gas Inflow onto a Lopsided Galaxy” (2018, ApJ, 852, 94)

“…It is generally low, ranging from < < ( ) q 6.6 log 7.3. This is in agreement with other galaxies in the GASP survey Poggianti et al 2017), even though in this case a clear clumpy pattern emerges, while in other galaxies a more smooth distribution is observed. Hα knots tend to have a systematically large value of q: the median value integrated across the entire galaxy is 6.8, while the median value in the Hα knots is 7.…”

The AMUSING++ Nearby Galaxy Compilation. I. Full Sample Characterization and Galactic-scale Outflow Selection

“…(iii) The GAs Stripping Phenomena in galaxies with MUSE (GASP; Poggianti et al 2017). This project has observed 114 stripping candidates galaxies at redshifts 0.04 < z < 0.07.…”

A panchromatic spatially resolved analysis of nearby galaxies – I. Sub-kpc-scale main sequence in grand-design spirals

“…They conclude that some processes related to morphology must set the local SF activity of a galaxy. Recently, Vulcani et al (2019) studied the spatially resolved MS in a sample of 30 local late-type star-forming galaxies up to four effective radii, exploiting the GAs Stripping Phenomena in galaxies with MUSE survey (GASP, Poggianti et al 2017). They find that Σ and Σ SFR correlate with a scatter of 0.3 dex, larger than the one observed for CAL-IFA and MaNGA galaxies.…”