2023
Tuesday, December 19, 2023
Reem-Kayden Center Lobby 5:00 pm – 6:30 pm EST/GMT-5
Join us in celebrating our December graduating seniors as their present their work! |
Sunday, December 17, 2023
Hegeman 105 4:00 pm – 6:00 pm EST/GMT-5
The Physics Study Room is a great place to study, meet with your study group, or consult a Physics tutor. |
Friday, December 15, 2023
Delilah Gates, Princeton University
Brody Lab-Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 Black holes are remarkable objects predicted by Einstein's theory of gravity, General Relativity. Despite their mysterious nature observational evidence suggests that black holes are abundant in our universe. The defining feature of a black hole is the event horizon, a region from which nothing can escape. Evidence of black holes thus relies on observing the effects black holes have on their surroundings. Black holes can be observed and studied using wave-related phenomena: frequency shifting of light emitted near them, reverberation of sounds through their surrounding medium, and even ripples throughout the fabric of space and time. |
Sunday, December 10, 2023
Hegeman 105 4:00 pm – 6:00 pm EST/GMT-5
The Physics Study Room is a great place to study, meet with your study group, or consult a Physics tutor. |
Friday, December 8, 2023
Thorsten Schimannek, LPTHE-Sorbonne Universite
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 String theory originated as an attempt to understand the nature of strong interactions but has subsequently transformed into a candidate for a "theory of everything." Nowadays, the idea that our universe is fundamentally described by a theory of strings is still facing both technical and philosophical problems. However, independent of its status as a theory of nature, it has been remarkably successful as a "physical theory of mathematics." Much of this success is related to the idea of compactification of extra dimensions, leading to a dictionary between geometry and physics, and the phenomenon of duality, meaning that strings propagating on a given geometry can be physically indistinguishable from other types of strings propagating on a different geometry. In this talk I will give a (non-technical) introduction to these concepts and illustrate the beautiful interplay between physics and mathematics at the example of counting curves in higher dimensional spaces. |
Sunday, December 3, 2023
Hegeman 105 4:00 pm – 6:00 pm EST/GMT-5
The Physics Study Room is a great place to study, meet with your study group, or consult a Physics tutor. |
Friday, December 1, 2023
Ben Holtzman, Columbia University
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 |
Friday, November 3, 2023
Munazza Alam, Space Telescope Science Institute
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 In the past two decades, we have discovered thousands of planets outside of the Solar System, many of which are nothing like our own. We can learn a great deal about the properties of these planets if we observe them when they pass in front of (transit) their host stars. During transit, a small fraction of starlight filters through the planet's atmosphere. By precisely measuring the spectrum of this filtered starlight, we can learn about the makeup of the planet's atmosphere. Observing planets with this technique allows us to understand the composition of their atmospheres as well as how they formed and evolved. In this talk, I will discuss how I use data from Hubble, JWST, and large ground-based telescopes to detect and characterize the atmospheres of Jupiters to super-Earths. Munazza Alam is an astronomer, National Geographic Young Explorer, and staff scientist at the Space Telescope Science Institute in Baltimore, MD. She earned her Bachelor's degree in physics and astronomy from CUNY Hunter College in New York City, and received her PhD in astronomy and astrophysics from Harvard University in 2021. Munazza uses data from the Hubble and James Webb Space Telescopes for her research, as well as world-class ground-based facilities at the Mauna Kea Observatories in Hilo, Hawai’i and the Las Campanas Observatory in La Serena, Chile. In her free time, she enjoys oil pastels and watercolors. |
Friday, October 27, 2023
Reem-Kayden Center 4:00 pm – 6:00 pm EDT/GMT-4
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Friday, October 27, 2023
Corey Allard, Harvard University
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 |
Thursday, October 26, 2023
Reem-Kayden Center Laszlo Z. Bito '60 Auditorium 5:00 pm – 7:00 pm EDT/GMT-4
Majoring (or interested) in science or math but unsure about whether grad school is right for you? The Bard Interdisciplinary Science Research Accelerator is sponsoring a panel discussion, Q&A, and networking event with admissions administrators and faculty from across the region. We’ll talk about what master’s and PhD programs are out there, what they are like, and how to optimize the rest of your time spent at Bard. Panelists: Delilah Gates Gravity Initiative Postdoctoral Associate Research Scholar, Princeton University Andrew Harder Director of Graduate Admissions, Mathematics Department, Lehigh University Emily Harms Senior Associate Dean, The Rockefeller University Felicia Keesing David and Rosalie Rose Distinguished Professor of Science, Mathematics, and Computing, Bard College Chris Lafratta Professor of Chemistry, Bard College Chuck Doran Distinguished Visiting Professor of Mathematics and Physics, Bard College Open to all Bard students, especially those moderated in mathematics or the sciences. |
Friday, October 20, 2023
Artemis Spyrou, Michigan State University
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 Since its birth roughly 60 years ago, the field of Nuclear Astrophysics strives to provide a comprehensive description of element synthesis in the Universe. While parts of stellar nucleosynthesis are well understood, others remain elusive to this day. Especially, the production of elements heavier than iron has been one of the major open questions in the field. Multiple processes and stellar sites contribute to the complex puzzle of heavy element production. Interpreting the astronomical observations requires the understanding of the nuclear processes that drive stellar explosions. This colloquium will focus on the critical nuclear properties needed to explain heavy element nucleosynthesis. I will discuss recent experimental results, as well as new initiatives and future plans at the next generation rare isotope facility, the Facility for Rare Isotope Beams (FRIB) at Michigan State University. |
Friday, October 6, 2023
Paul Cadden-Zimansky, associate professor of physics, and Christopher LaFratta, professor of chemistry
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 This year's Nobel Prize in physics recognized pioneering work in the creation of flashes of light that last less than a quadrillionth of a second. In this talk, aimed at a general audience, we'll explain how the cause of a mysterious set of "overtones" in the interaction of lasers and atoms was unraveled, how solving this mystery set off a race to break an unbreakable time-barrier, and how breaking this time-barrier has allowed scientists to take the highest of high-speed photographs, glimpsing the previously unobservable world of electron motions at the subatomic scale. |
Friday, April 21, 2023
Ligia Coelho, Cornell University
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 Biopigments are colorful molecules found in all branches of life and are responsible for coloring Earth's landscapes. These molecules provide organisms with various benefits, such as protection against radiation, temperature changes, lack of resources, and dryness - conditions that are common on Earth and beyond. If life exists elsewhere, it will need to find analogous mechanisms to cope with these conditions. Biopigments have unique reflectance spectral features and are potential pervasive signatures of life. The potential colors of extraterrestrial surfaces can be studied using future large space-based telescopes such as the Large Ultraviolet Optical Infrared Surveyor (LUVOIR) and the Habitable Exoplanet Observatory (HabEx). To aid in the search for life on terrestrial planets, we are developing a comprehensive spectra catalog of the colors of life linked to specific ecosystems – since different biopigments (with different spectral features) will be part of the response against different environmental conditions. This free spectra library covers the visible to near-infrared and provides a guide for the search for surface life on planets like ours or other habitable planets that may be colder, drier, or just different than Earth. |
Friday, April 14, 2023
Yeonsu Jung, Harvard University
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 Exploring the design principles of biological soft matter is a complex task due to disorder, nonlinearity, and interactions, among other factors. In this presentation, I will discuss my research on several biological and bio-inspired soft matter systems, including water uptake by plant roots in soil, animal architecture built based on granular jamming and entanglement principles, and stingray-inspired wearable proximity sensor. To tackle the complexity of biological soft matter, I use a combined experimental and theoretical approach. Image-based visualization techniques, including Particle Image Velocimetry, Interferometry, and X-ray Tomography, are essential for accurately describing complex systems. With proper image analysis, these methods yield microscopic-scale quantitative data. The explanatory power of theoretical modeling and computation complements the limitations of experimental approaches. Additionally, understanding the design principles of biological systems can inspire the development of bio-inspired inventions. My research aims to not only understand biological phenomena but also develop complex systems inspired by living organisms through collaboration with material scientists and roboticists. During the presentation, I will discuss how combining experimental and theoretical techniques can provide a fundamental understanding of biological systems. Furthermore, I will explore how studying the design principles of biological systems can lead to the development of artificial systems beneficial for environment and human society. |
Friday, April 7, 2023
Jennifer Winters, Harvard University
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 Small, low-mass stars are the most numerous types of stars in the Galaxy, with 75% of all stars expected to be of spectral class M (and thus known as M dwarfs), corresponding to masses roughly 10–60% that of our Sun. However, due to their low luminosities, studying this population has been particularly challenging, and many of their properties—such as their ages, activities, multiplicity—remain unconstrained. With numerous on-going surveys searching for planets around these low-mass systems, it is critical that the stars themselves be thoroughly understood. In this talk, I will present the results of my survey to identify and discover the very closest companions to the nearest M dwarfs. I will then highlight LTT 1445, a triple M dwarf system at 7 parsecs that hosts two transiting rocky planets, to illustrate why it is so critical that we understand exoplanets' host stars. |
Friday, March 31, 2023
Victoria Xu, Massachusetts Institute of Technology
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 From atom interferometry to laser interferometry, experiments are leveraging quantum mechanics to expand our gravitational view of the Universe. In atom interferometry, we have realized ultra-long coherence times for atoms in spatially-separated superpositions, which can be used for precision table-top tests of exotic physics and gravity. In laser interferometry, as one of the most sensitive instruments ever built, the Advanced Laser Interferometer Gravitational-wave Observatory (Advanced LIGO) operates at the limit of quantum noise to detect gravitational waves (GWs) from cataclysmic cosmic events, such as the mergers of black hole and neutron star binaries. Already, the detectors inject quantum light (“squeezed” vacuum) to reduce the high-frequency quantum noise from shot noise. Major upgrades have now been commissioned to additionally reduce the excess low-frequency quantum noise from opto-mechanical backaction. This involves coupling our squeezed light source to a 300-m long, narrow-band, optical “filter” cavity, which rotates the squeezing quadrature below 100 Hz to evade low-frequency quantum noise in the astrophysically-critical band. This low-frequency squeeze rotation will at last configure the LIGO interferometers for optimal sensing, capable of exceeding the standard quantum limit to our measurement sensitivity. In the next observing run of Advanced LIGO, our quantum-enhanced sensitivity will expand the observable horizon of GW astronomy by 70%, expected to bring GW detection from a near-weekly to near-daily occurrence just 9 years after the dawn of GW astronomy. |
Friday, March 17, 2023
Mary Knapp, Massachusetts Institute of Technology
Hegeman 107 12:00 pm – 1:00 pm EDT/GMT-4 We have maps of the sky across the electromagnetic spectrum - from high energy gamma rays through UV, optical, and infrared to radio frequencies. One part of the spectrum is yet unexplored, however - very low frequency radio (< 10 MHz / 30 m). This part of the spectrum is blocked by the Earth's ionosphere and is challenging to observe due to its very long wavelengths. If we could access the low frequency radio sky, we could look back in time to the cosmological Dark Ages, study the plasma and magnetic fields that fill the spaces between stars, track solar storms as they barrel toward Earth, and listen for the radio signatures of exoplanetary magnetic fields. In this talk, I'll discuss low frequency radio science and past, present, and future efforts to build telescopes that can observe the low frequency sky. I will describe the AERO-VISTA mission, which will map Earth's auroral radio environment. I will also discuss future telescope concepts on the Moon and in space that seek to unveil this hidden part of the EM spectrum. |
Friday, March 10, 2023
Ajit Subramaniam, Columbia University
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 The Tropical and Equatorial Atlantic Ocean has been well studied by physical oceanographers and meteorologists because of its importance to ocean circulation, deoxygenation, and rainfall in the Sahel but less is known about how the physics of this region controls biological processes. The Tropical Atlantic is thought to have enhanced biological productivity and play an important role in global carbon flux - Longhurst (1993) estimated that the tropical Atlantic Ocean (10N – 10S) contributed more to global carbon fixation than the entire North Atlantic open ocean including the well-studied Spring Bloom. The Equatorial upwelling process is widely accepted as being seasonal and is evident in satellite observations as lower monthly sea surface temperature and concomitant higher monthly chlorophyll concentrations between June and September of each year. We will discuss the role of physical forcing factors such as the Amazon River outflow, the position of the Inter-Tropical Convergence Zone, and Tropical Instability Wave activity in controlling the availability of nutrients and consequently, the phytoplankton community structure from cruises we participated in this region. |
Friday, March 3, 2023
Mary Knapp, Massachusetts Institute of Technology
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 We have maps of the sky across the electromagnetic spectrum - from high energy gamma rays through UV, optical, and infrared to radio frequencies. One part of the spectrum is yet unexplored, however - very low frequency radio (< 10 MHz / 30 m). This part of the spectrum is blocked by the Earth's ionosphere and is challenging to observe due to its very long wavelengths. If we could access the low frequency radio sky, we could look back in time to the cosmological Dark Ages, study the plasma and magnetic fields that fill the spaces between stars, track solar storms as they barrel toward Earth, and listen for the radio signatures of exoplanetary magnetic fields. In this talk, I'll discuss low frequency radio science and past, present, and future efforts to build telescopes that can observe the low frequency sky. I will describe the AERO-VISTA mission, which will map Earth's auroral radio environment. I will also discuss future telescope concepts on the Moon and in space that seek to unveil this hidden part of the EM spectrum. |
Friday, February 24, 2023
Luchang Jin, University of Connecticut
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 Quantum field theory is the foundation of current high-energy physics. Quantum field theory can be properly formulated on a grid or lattice of points in space and time, which provides a non-perturbative definition of the quantum field theory and a way to perform numerical simulations. Lattice is a powerful tool to study quantum field theories, especially in the presence of strong interactions. In this talk, we will introduce the lattice approach to quantum field theory and its application to simulating quantum chromodynamics and electrodynamics, using path integral and Monte Carlo methods. In particular, we will report the results of one of our recent calculations, the electromagnetic correction to the mass of the lightest meson—subatomic particles formed by a quark and anti-quark pair, bound together by the strong interaction. |
Friday, February 10, 2023
Tajana Marie Schneiderman, Cornell University
Hegeman 107 12:00 pm – 1:00 pm EST/GMT-5 Circumstellar disks of gas and dust are integral parts of planetary systems from formation to maturation. Protoplanetary disks, the name for circumstellar material at the earliest stages of a stellar lifetime, provide key information about the formation processes of planets, and therefore of the initial conditions that set system evolution in motion. Debris disks, the name for circumstellar material after the protoplanetary disk dissipates, are remnants of earlier processes and carry clues to the formation conditions and evolutionary pathways of mature systems. In this talk, I will demonstrate that understanding circumstellar material is key to interpreting planetary histories by examining two case studies. First, I will present my laboratory work seeking to understand the behavior of noble gases in disk ice analogs. These experiments help explain the extent to which each gas traces different sources of volatiles within the protoplanetary disk. They also present initial clues as to the source of Jovian noble gas abundances. Second, I will discuss observations of the circumstellar material in the HD 172555 system. Here, gas and dust analysis indicates the first evidence for a planetary atmosphere stripped in the aftermath of a giant impact. |