Upcoming JC
Title: Composite Bulges -- IV. Detecting Signatures of Gas Inflows in the IFU data: The MUSE View of Ionized Gas Kinematics in NGC 1097
Speaker: Shangguan
Summary: This paper analyze the detailed kinematic features of MUSE data cube of the inner starburst ring of NGC 1097. They emphasize the difficulties of reviewing the inflow features by simply comparing the gas velocity map with the circular disk model, due to both the uncertainties of the prior information of the PA and inclination and the presumably complex kinematics of the gas dynamics. Then, they discuss the evidence of the physical origin of some coherent velocity map residual patterns with BPT diagram and advertise that the velocity difference between [NII] and Halpha lines can be a useful indicator of the shocked region of the inflow gas. Overall, this work focuses on very small scale gas kinematic structures comparing to the studies of high-z galaxies of our group.
Past JC
Title: Statistics for Galaxy Outflows at z∼6−9 with Imaging and Spectroscopic Signatures Identified with JWST/NIRCam and NIRSpec Data
Speaker: Capucine
Summary: Zhang et al look at 61 galaxies between z=5.4 and 8.9, both using NIRSpec spectroscopy and NIRCam imaging, to study the outflow properties in their sample. They make a study of both spatially extended [OIII] emission in the imaging (5/61) and broad component in the emission line, indicating the presence of fast winds (5/30); including one galaxy that has both spatially extended emission and a broad component in the spectra. They compute the ratio of the wind velocity over the escape velocity of the galaxies' halo, and find that none of the detected outflows have velocities high enough to eject gas outside the gravitational well of the halo. They conjecture that they are witnessing the different phases of a star forming outflow event (as shown in the figure, where in the beginning outflows can only be seen in the spectra, then an extended emission is observed, and finally it falls back into the galaxy). They also compare their outflow incidence in the extended emission at high redshift to local studies, and find an increase in the incidence broadly consistent with the increase in major merger rate; but fail to observe a similar increase in incidence with the "spectral" outflows (Figure 11).
Title: The MOSDEF-LRIS Survey: Detection of Inflowing Gas Towards Three Star-forming Galaxies at z ~ 2
Speaker: Daizhong
Summary: The authors observed wide rest-UV absorption lines in three MOSDEF galaxies. They argue that these are the signature of inflowing gas from the recycled metal-enriched gas with a large velocity ~250-500 km/s, instead of pristine gas from the CGM.
Meeting location: MPE IR meeting room and mpeir Zoom (passcode: 123)
Date and time: Every Monday at 13h45
Q&A:
Q: Where should I look for or suggest papers?
A: MPE IR Benty-fields or in the MPE IR Group Slack channel #galev-interesting-papers
Q: What if I do not have access to MPE IR Benty-fields page or the Slack channel?
A: Send an email to Lilian (lilian[at]mpe.mpg.de)
This page is maintained by Lai Yee Lilian Lee and Claudia Pulsoni . Last updated on 23 Jun 2023.
