Colloquium

Special Colloquium

Gravitational Waves from f-modes as a Tool to Probe the Neutron Star Interior
Dr. Debarati Chatterjee, Inter-University Centre for Astronomy and Astrophysics

March 27, 2024
11:00am in LA4-120

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Debarati Chatterjee

Abstract

Unstable oscillation modes in Neutron Stars can be important sources of Gravitational waves (GW). In particular, the fundamental f-modes could be detectable with the improved sensitivity band of the current generation of GW detectors or with the future generation detectors. The mode characteristics are sensitive to the neutron star internal composition. In a series of recently published works, we performed systematic investigations of gravitational wave emission from neutron stars via f-modes.

We identified important nuclear parameters that are strongly correlated with the mode characteristics. We then constructed improved universal relations and demonstrated how they can be applied in neutron star asteroseismology to constrain the equation of state from f-mode observations. We recently investigated how the nature of hadron quark phase transition and the existence of twin stars or strange stars can be probed with f-mode detections. We also showed how tidal heating from high bulk viscous dissipation of the dynamical f−mode excitations during binary inspirals can indicate the presence of strangeness in the interior of neutron stars.

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neutron star equation of state
Fig. Constraints on the neutron star Equation of State using a single f-mode observation with Advanced LIGO (A+) and Einstein Telescope (ET) [2306.04626]

The Colloquium is a unique opportunity for students to learn about new developments in physics and what physicists do after they graduate. Hosted by the Physics and Astronomy Department at California State University, Long Beach, the weekly meetings invite guests from universities, research laboratories, and industry to present and discuss current topics in physics. All students are encouraged to attend for a well-rounded experience and training in physics.

Colloquium Coordinator

For information and suggestions about the colloquium please contact the colloquium coordinator:

Dr. Alex Klotz
Alex.Klotz@csulb.edu

Schedule

The following is the schedule for Spring 2024.

Upcoming Colloquia
Date Title Speaker and Affiliation
March 27, 2024 Gravitational Waves from f-modes as a Tool to Probe the Neutron Star Interior Dr. Debarati Chatterjee, Inter-University Centre for Astronomy and Astrophysics
April 8, 2024 (topic: solid state physics) Ramamoorthy Ramesh, Rice University
April 15, 2024 (topic: astronomy) Smadar Naoz, UCLA
April 22, 2024 (topic: biophysics) Rae Robertson-Anderson, University of San Diego
April 29, 2024 (topic: particle physics) Juan Pedro Ochoa-Ricoux, UC Irvine
May 6, 2024 End of Semester Presentations Students, CSU Long Beach

Previous Colloquia

Previous Colloquia from This Semester
Date Title Speaker and Affiliation
March 25, 2024 Exploring Topological Phase Transitions and Dynamic Strain Engineering in Quantum Materials Dr. Luis A. Jauregui, UC Irvine
March 18, 2024 DNA Liquids Dr. Omar Saleh, UC Santa Barbara
March 11, 2024 The Gravity Tunnel in a Non-Uniform Earth Dr. Alex Klotz, CSU Long Beach
February 26, 2024 A City on Mars: Can We Settle Space, Should We Settle Space, and Have We Really Thought This Through? Zach Weinersmith, illustrator and writer for Saturday Morning Breakfast Cereal
February 19, 2024 Driving Quantum Matter to Extremes Dr. Sarah Grefe, CSU Long Beach
February 12, 2024 Solar System Archaelogy: Multi-disciplinary Approaches to Understanding Planetary System Formation and Environmental Science Dr. Gerardo Dominguez, CSU San Marcos
February 5, 2024 Assembly, Disassembly, and Mechanics of Entropic Colloidosomes Dr. Zvonimir Dogic, UC Santa Barbara
January 29, 2024 What Quantum Materials Can Reveal When Interrogated with Photoemission and Electronic Transport Probes Dr. Claudia Ojeda-Aristizaba, CSU Long Beach

The Colloquium Archive has the Colloquia from previous semesters.


Sponsors

We acknowledge with gratitude donations and support from the following present sponsors:

  • H.E. and H.B. Miller and Family Endowment
  • Benjamin Carter
  • American Physical Society
  • Anonymous

We also acknowledge with gratitude our past donors: The Forty-Niner Shops, Inc., The Northrop Grumman Foundation, Sandra Dana, Anonymous.

If you wish to support the Colloquium, please contact the colloquium coordinator or the department chair. Thank you!