Speaker
Description
We report results from observations of the CGM ionized, atomic, molecular, and condensed phases using a combination of integral field spectroscopy (MaNGA, VLT MUSE, JWST MRS), and imaging and spectroscopy from HST, VLT, Magellan. In a study of the warm and cool CGM of galaxies mapped with IFS, and a comparison of the kinematics, ionization, and metallicity of this gas with the ionized gas in star-forming regions in the galaxies, we find consistency with a co-rotation of the cool CGM with galaxy disks and hints of changes in gas ionization, potentially due to the stronger intergalactic radiation field at larger galactocentric distance. Our spatially resolved maps of gas metallicity and ionization around galaxies provide constraints on models of the metal distribution around galaxies. Our results are also consistent with higher metallicity and higher ionization parameter for gas at higher elevation angles, as expected for outflows. Our JWST studies of the composition, structure, and extinction properties of the dust grains in both the diffuse and dense ISM/CGM of galaxies at 0<z<1.5 indicate that dust grains in distant galaxies differ in physical and chemical properties from grains in local galaxies. Finally, our study of the ISM/CGM at 4<z<6 shows that high-redshift galaxies show a wide diversity of chemical enrichment histories, including some cases of highly accelerated chemical evolution.
We gratefully acknowledge support from NASA/STScI grants for HST GO-15939, GO-16242, GO-17121, JWST GO-2155, GO-5491, and from NASA grant 80NSSC20K0887.
| Primary Theme | Hot gas to cold gas |
|---|---|
| Secondary Theme | Diffuse to dense structures |
| Presenter's Name | Varsha P. Kulkarni |
| Presenter's Email Address | [email protected] |
| Keywords | warm/cool CGM, dust, metal distribution, kinematics, co-rotation, ionization, IFS, evolution |
| Recording Permission | YES |
| Virtual Audience Permission | YES |
| Photography Permission | YES |
| If your talk is not accepted for a contributed talk, would you be interested in presenting a fireslide/lightning talk? | No |
| If your fireslide/lighting talk is not accepted, would you be interested in presenting a poster? | No |
Author
Co-authors
External references
- 25070051
- 91612d4c-7f49-441b-8945-eb26b33f7d45
