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<p>Hi everyone,</p>
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<p>We will have the first PASS talk of this academic year on <b>Monday,
September 29</b>. Jose will be talking about the Morphological
diversity of Galaxies in the Local Universe. Please join us at
noon (<b>from 12:00 to 1:00 pm</b>) in the <b>Nebula Room</b>
(PHYS 3027). </p>
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<p align="center"><b>Dr. Jose Benavides, PostDoc Researcher<br>
</b>Monday, 12:00 pm, Nebula Room (PHYS 3027)</p>
<p align="center"><b>Exploring the Morphological Diversity of
Galaxies in the Local Universe</b></p>
<p align="center"><b><br>
</b></p>
<p align="center">In the Local Universe, galaxies exhibit a
remarkable morphological diversity, ranging from massive spirals
and ellipticals to irregular and dispersion-dominated low-mass
systems. Understanding the origin of this diversity is of vital
importance for testing and refining our models of galaxy formation
and evolution.<br>
<br>
In the first part, I will focus on the physical conditions that
govern disc formation in low-mass galaxies (M_star < 10^10
M_sun). Using data from the FIREbox and FIRE zoom-in cosmological
simulations, we explore how stellar feedback, gas dynamics, and
halo spin contribute to the emergence of rotationally supported
structures. Our results show that discs can form under specific
conditions—such as the presence of cold, high-angular-momentum gas
or interactions with satellites—and we identify a morphological
transition from spheroidal to disky systems at M_star ~ 10^9
-10^10 M_sun.<br>
<br>
In the second part, I will analyze the shapes of galaxies through
the distribution of projected axis ratios (q=b/a) across both
observational surveys (GAMA, DESI, ALFALFA, and Nearby Galaxy
surveys) and cosmological simulations (TNG50, FIREbox, and
ROMULUS25). This comparison reveals a systematic under-prediction
of thin, disky low-mass galaxies in simulations, suggesting
limitations in current models of baryonic physics, feedback, and
morphological evolution.</p>
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<div
id="m_-3414541767872711075m_9215603032040371864m_-1672972118947443868gmail-:1f4">
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<div dir="ltr">If you’re interested in sharing your work as a
speaker, please feel free to add your name to this spreadsheet
[<a
href="https://docs.google.com/spreadsheets/d/1N3ncf43jdB6aHYHhyWmyHMycxDg4_phHZXLkQvviO0o/edit?usp=sharing"
target="_blank">Google Sheet</a>]. Recordings of all the
previous talks are available on our website: <a
href="https://ucrpass.arxiv.social/" target="_blank"
class="moz-txt-link-freetext">https://ucrpass.arxiv.social</a>
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Best,<br>
Pooyan<br>
Physics and Astronomy Student Seminar (<span><span>PASS</span></span>)
<br>
<a href="https://ucrpass.arxiv.social/" target="_blank"
class="moz-txt-link-freetext">https://ucrpass.arxiv.social</a></div>
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