Caroline Bertemes

@[email protected]
261 Followers
106 Following
15 Posts
Postdoctoral Astrophysicist at Heidelberg Uni.
Galaxy Evolution & AGN | Molecular gas | Spatially resolving galaxies.
🇱🇺 | She/her | #BiInSci 🏳️‍🌈
Twitterhttps://twitter.com/carobertemes
Webpagehttps://cbertemes.github.io/
Caroline BertemesAug 25, 2023
How can we study (quasar) outflows in the mid-infrared with JWST? 🤔
Here's a great summary of our latest #Q3D study lead by D. Rupke - a cross-comparison of MIR & optical tracers: https://aasnova.org/2023/08/23/jwst-quasars/
JWST Validates a New Tool for Studying Quasars

Comparing quasar observations made at key optical and infrared wavelengths shines a light on the best way to study quasar outflows with JWST.

AAS Nova
Caroline BertemesJan 29, 2023
Show threadThomas ConnorJan 28, 2023

And here's the final Unofficial count of #JWST #JWSTCycle2 submissions. Looks like it cracked 1600! There are going to be a lot of sad Blacker emails later this year.

#Astrodon #Astronomy #Astrophysics

Caroline BertemesJan 27, 2023
Potential LaTeX tip (or me doing sth weird? 🤔):
I’m compiling the same .tex file on Overleaf and locally in Texmaker. Turns out I get slightly different page breaks & a shorter pdf from my local machine ✨
#JWSTCycle2
Caroline BertemesDec 26, 2022
Jane RigbyDec 25, 2022

Happy #JWST launch anniversary! Here’s what launch felt like at mission control
https://blogs.nasa.gov/webb/2021/12/25/what-it-felt-like-at-mission-ops-control-when-we-launched-jwst/

https://blogs.nasa.gov/webb/wp-content/uploads/sites/326/2021/12/Jane-Rigby-in-MOC-768x577.jpg

What it felt like at Mission Ops Control when we launched JWST – James Webb Space Telescope

Show threadCaroline BertemesNov 24, 2022
(6/6) Surprisingly we find no obvious link to morphology 🤔
But: t_dep & ∇Z are linked to the spatial distribution of star formation - due to a resolved mass-metallicity-SFR relation?
Show threadCaroline BertemesNov 24, 2022
(5/6) The outflows are very low-velocity though... We don't find any mass effects etc. and discuss effects of the gravitational potential further in the paper.
<Speculating> Could these weak outflows below the MS be one of the final phases of feedback? </Speculating>
Show threadCaroline BertemesNov 24, 2022
(4/6) Now on to ionised gas kinematics:
Both Z gradients & t_dep correlate with centralised [OIII] velocity width!
We interpret this as evidence for chemically enriched outflows moving metals from the centre to the outskirts & slowing down star formation💨💨💨
Show threadCaroline BertemesNov 24, 2022
(3/6) So whichever mechanism is quenching these AGN-like objects may also flatten/invert metallicity gradients at the same time 🤔
Show threadCaroline BertemesNov 24, 2022
(2/6) In AGN/LINERs/Composites *below the star-forming Main Sequence*, metallicity gradients ∇Z correlate with the molecular gas depletion time t_dep.
(t_dep = inverse of the star-forming efficiency)
More quenched AGN-like objects have flatter/+ gradients! Not so in inactive galaxies.
Caroline BertemesNov 24, 2022
Paper day! 🎉 How are molecular gas properties linked to spatially resolved (optically-inferred) galaxy quantities?
In this first MASCOT paper, we focus on relations with metallicity gradients and ionised gas kinematics (1/6)
https://arxiv.org/abs/2211.12518
MASCOT: Molecular gas depletion times and metallicity gradients -- evidence for feedback in quenching active galaxies

We present results from the first public data release of the MaNGA-ARO Survey of CO Targets (MASCOT), focussing our study on galaxies whose star-formation rates and stellar masses place them below the ridge of the star-forming Main Sequence. In optically-selected type 2 AGN/LINERs/Composites, we find an empirical relation between gas-phase metallicity gradients $\nabla Z$ and global molecular gas depletion times $t_\mathrm{dep} = M_{H_2}$/SFR with "more quenched" systems showing flatter/positive gradients. Our results are based on the O3N2 metallicity diagnostic (applied to star-forming regions within a given galaxy) which was recently suggested to also be robust against emission by diffuse ionised gas (DIG) and low-ionisation nuclear emission regions (LINERs). We conduct a systematic investigation into possible drivers of the observed $\nabla Z$ - $t_\mathrm{dep}$ relation (ouflows, gas accretion, in-situ star formation, mergers, and morphology). We find a strong relation between $\nabla Z$ or $t_\mathrm{dep}$ and centralised outflow strength traced by the [OIII] velocity broadening. We also find signatures of suppressed star-formation in the outskirts in AGN-like galaxies with long depletion times and an enhancement of metals in the outer regions. We find no evidence of inflows impacting the metallicity gradients, and none of our results are found to be significantly affected by merger activity or morphology. We thus conclude that the observed $\nabla Z$ - $t_\mathrm{dep}$ relation may stem from a combination of metal redistribution via weak feedback, and a connection to in-situ star formation via a resolved mass-metallicity-SFR relation.

arXiv.org