Resolving an orphan cloud as a signpost of ICM clumping

Science Keywords: Select from 2 to 5 items. 0 Assigned ID: 3805 ----- Attempting Submission 1 (Tue Aug 30 15:05:12 GMT 2022) ----- Joint Chandra/HST ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN 0 ----- Attempting Submission 1 (Tue Sep 06 01:45:21 GMT 2022) ----- ----- Attempting Submission 2 (Thu Dec 07 16:02:00 GMT 2023) ----- Warnings on Visit 01 and 02, either failed or finished. The new submission is on Visit 03 --- reobservation of Visit 01, already approved. Resolving an orphan cloud as a signpost of ICM clumping A first and only known isolated (or galaxy-less) cloud detected in Ha, CO and X-rays was discovered in the nearby galaxy cluster A1367. This discovery provides a firm connection between the clumps in the intracluster medium (ICM) and the stripped gas from infall galaxies. This case suggests that at least some ICM clumps are multi-phase in nature. The cloud presents a great laboratory to study the evolution of the stripped ISM far away from the parent galaxy and ICM clumps in details. We request joint Chandra, HST and VLA observations to 1) look for a sharp edge in X-rays; 2) study the central orphan X-ray cool core; 3) resolve X-ray point sources; 4) study SF history and conditions; and 5) search for HI gas around the cloud. We will observe the orphan cloud in A1367 with three filters F275W, F475W and F814W in two orbits to search for star formation and features indicative of ram pressure stripping. F475W and F814W observations will be done in one orbit with ACS/WFC, while the F275W observation will be done in another orbit with WFC3/UVIS. The ACS data in two high-throughput filters allow detections of faint features (e.g., individual star cluster associations). The F275W data will add important information on the SF in the last several 10^7 years and the F275W - F475W color is a very good age indicator. n/a Galaxies 6 false false false false false false false false SUPPORTED CLUSTER OF GALAXIES EMISSION LINE NEBULA RICH CLUSTER STAR FORMING REGION YES J2000 J2000 CLUSTER OF GALAXIES EMISSION LINE NEBULA RICH CLUSTER STAR FORMING REGION YES J2000 J2000 ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F275W POS-TARG DITHER 3.034 LINE false false 2 85.29 ACS-WFC-DITHER-LINE 1

false

POS-TARG MOSAIC DITHER 2 2.4 WFC3-UVIS-MOS-DITH-LINE false true 0.119 3 85.754 POS-TARG WFC3-UVIS-MOS-DITH-LINE 33.606 2

false

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