Origins Seminars
Origins Seminars
  • Видео 125
  • Просмотров 22 646
Organosulfur Chemistry in the Birthplaces of Stars and Planets (Suchitra Narayanan, UH/Harvard)
Talk given November 12, 2024. Of the elements critical for life, sulfur is poorly understood due to its 1-2 orders of magnitude depletion in the gas phase of star-forming regions (also known as the “missing sulfur problem”). To reconcile this, sulfur is believed to be locked up in icy grains; however, the sum of the solid sulfur inventory in ices accounts for only ≤ 4% of the cosmic sulfur abundance. The most updated astrochemical gas-grain reaction network predicts that this observed sulfur depletion could be explained if the majority of the sulfur exists in the form of solid organosulfur species. However, due to the limited number of solid-state sulfur experiments, this model, like many...
Просмотров: 182

Видео

Hungry, Hungry White Dwarfs: Tidal Disruption of Planetesimals Post-Natal Kick (Tatsuya Akiba, CU)
Просмотров 446Месяц назад
Many white dwarfs are polluted by metals, implying a recent accretion event. The tidal disruption of planetesimals is a viable source of white dwarf pollution and offers a unique window into the bulk composition of exoplanet bodies. The question of how planetary material enters the tidal disruption radius of the white dwarf, however, is unresolved. Using a series of N-body simulations, we explo...
Snapshots of Giant Planet Migration: case studies of eccentric warm Jupiters (Arvind Gupta, NOIRLab)
Просмотров 286Месяц назад
The production of Jupiter-sized planets with orbital periods of P less than 10 days - “hot Jupiters” - has presented an enticing challenge for our understanding of exoplanet dynamics and planet formation. A number of viable migration models have been put forth, but post-migration orbital evolution often erases important clues to the dynamical history of individual systems, making it difficult t...
Kaleidoscope of irradiated disks: VLT/MUSE observations of proplyds (Mari-Liis Aru, ESO)
Просмотров 258Месяц назад
Talk given November 4, 2024. The evolutionary pathways of protoplanetary disks, the birthplaces of planets, differ depending on the surrounding environment. In massive star clusters, UV radiation affects disks via external photoevaporative winds, depleting the disks outside-in and severely shortening their lifetimes. Known as proplyds, such irradiated disks are typically surrounded by a teardro...
Magnetic field strength and gas density: A multiscale analysis (David Whitworth, UNAM)
Просмотров 3512 месяца назад
Talk given October 21, 2024. Magnetic Fields are ubiquitous in the universe, from planetary magnetospheres to the primordial background field. They play key roles in various aspects ISM physics within galaxies, from their growth and pressure support across the multiphase medium to the suppression of star formation in regions of high field strengths. Since the seminal work of Crutcher at al 2010...
Dynamics of Star Formation on Different Scales: Envelopes, Multiples, Disks & Jets (Yisheng Tu, UVA)
Просмотров 2733 месяца назад
Talk given October 14, 2024. Star and planet formation is a complex process involving processes across all scales. In this talk I will present three sets of simulations, each focusing on a different scale, to illustrate the key processes involved in each scale. At the largest, molecular cloud core scale, the “gravo-magneto-sheetlet”, an intrinsic 3D structure due to the interaction between turb...
The JWST-MIRI View of a Gas-Rich Disk with a Large Dust Cavity (Kamber Schwarz, MPIA)
Просмотров 2673 месяца назад
Talk given October 7, 2024. SY Cha is a T Tauri star surrounded by a protoplanetary disk with a large cavity seen in the millimeter continuum but with the spectral energy distribution of a full disk. I will present the first results from JWST-MIRI Medium Resolution Spectrometer (MRS) observations taken as part of the MIRI mid-INfrared Disk Survey (MINDS) GTO Program. The derived molecular colum...
A framework for modeling the evolution of young stellar objects (Theo Richardson, UF)
Просмотров 933 месяца назад
Talk given September 30, 2024. Measuring the properties of young stellar objects (YSOs) is a key part of research into the pre-main-sequence evolution of stars. Due to the complex geometry of YSOs, measurement generally takes the form of comparing observed radiation to existing template populations of YSO SEDs modeled using radiative transfer. However, owing to uncertainty on the precise mechan...
Exoplanetary Epics: Environmental Storytelling Across Planetary Systems (Quadry Chance, UF)
Просмотров 923 месяца назад
Talk given September 23, 2004. With thousands of confirmed exoplanets, we now have access to clues about planets and planet formation embedded in planet hosts' past and present environments. This has already yielded many successful models of how we expect planetary systems to behave. Examining where some of these models start to break down and determining if we need new components has been the ...
Magnetic Fields in Star Formation: 1st Complete 3D Vector Observations (Mehrnoosh Tahani, Stanford)
Просмотров 2304 месяца назад
Talk given September 16, 2024. Polarimetry observations over the past decade have highlighted the critical roles that magnetic fields play in the formation of clouds and stars. Despite their importance, observing these magnetic fields, particularly in 3D, remains significantly challenging. In this talk, I will briefly discuss how we overcame these challenges in determining the 3D magnetic field...
OSIRIS-REx: Insights from the Asteroid Bennu & Initial Analysis of the Returned Samples (D Lauretta)
Просмотров 3004 месяца назад
The OSIRIS-REx mission has been a pivotal step in our understanding of near-Earth asteroids and the early solar system. This presentation will delve into the mission's journey to Bennu, the challenges faced in collecting samples, and the wealth of data returned. It will highlight key findings from the initial analysis of the samples, offering insights into Bennu's composition and its implicatio...
Reflected light imaging of exoplanets - 5 years of development with MagAO-X (Sebastiaan Haffert, UA)
Просмотров 7937 месяцев назад
Origins Seminar presented April 29, 2024 Abstract: The imminent era of the Extremely Large Telescopes, like the 25-meter Giant Magellan Telescope, will offer unprecedented sensitivity and spatial resolution, enabling new discoveries in all areas of astronomy and astrophysics. Among its top priorities is the discovery and characterization of Earth-like planets that could have climates like ours ...
Testing external photoevaporation through optical forbidden lines in Orion (Karina Mauco, ESO)
Просмотров 959 месяцев назад
Origins Seminar presented 25 March 2024 Abstract: Most planetary systems, including our Solar System, form in massive star clusters, where external photoevaporation by UV radiation from OB stars profoundly influences the evolution of protoplanetary disks. The Orion star-forming region is a unique laboratory to study this process, mainly because it is the closest (~400 pc) star-forming region co...
Thermal Properties of the Hot Core Population in Sagittarius B2 Deep South (Desmond Jeff, NRAO/UF)
Просмотров 829 месяцев назад
Origins Seminar presented 11 March 2024 Abstract: Hot molecular cores are thought to represent a key phase of protostellar evolution and the evolution of the ISM, as the antecedents to ultra-compact HII regions and formation sites of complex organic molecules. However, owing to the complex interplay between gas-phase and grain-surface chemistry in pre and protostellar cores, the temporal and ph...
Disk wind & mid-IR variability: T Cha with JWST (Naman Bajaj, Chengyan Xie/UA; Andrew Sellek/Leiden)
Просмотров 12610 месяцев назад
Origins Seminar presented 4 March 2024 Abstract: Circumstellar disk dispersal is a brief, yet critical, end stage of disk evolution, dictating the end of planet formation and migration. Thermal winds powered by high-energy stellar photons have long been theorized to drive disk dispersal. However, evidence for these winds is currently based only on small (~3-6 km/s) blue-shifts in [Ne II] 12.81 ...
Illuminating Protoplanetary Disk Substructures & Effects on Exoplanets (Taylor Kutra, Lowell Obs)
Просмотров 15910 месяцев назад
Illuminating Protoplanetary Disk Substructures & Effects on Exoplanets (Taylor Kutra, Lowell Obs)
Demystifying the Sub-Neptune Frontier with JWST (Anjali Piette, Carnegie EPL)
Просмотров 16611 месяцев назад
Demystifying the Sub-Neptune Frontier with JWST (Anjali Piette, Carnegie EPL)
Unveiling the asymmetry of the Lagrange points (Agustín Herón, Pontif Universidad Católica de Chile)
Просмотров 8711 месяцев назад
Unveiling the asymmetry of the Lagrange points (Agustín Herón, Pontif Universidad Católica de Chile)
Atmospheric Chemical Reaction Network Topology: Potential Exoplanet Biosignatures -Tessa Fisher (UA)
Просмотров 73Год назад
Atmospheric Chemical Reaction Network Topology: Potential Exoplanet Biosignatures -Tessa Fisher (UA)
Debris Disk Origins in Slow Photoevaporation Around Intermediate-Mass Stars - Ryohei Nakatani (JPL)
Просмотров 69Год назад
Debris Disk Origins in Slow Photoevaporation Around Intermediate-Mass Stars - Ryohei Nakatani (JPL)
AI4Astro: Exploring Star Formation and ISM through Artificial Intelligence - Duo Xu (UVA)
Просмотров 49Год назад
AI4Astro: Exploring Star Formation and ISM through Artificial Intelligence - Duo Xu (UVA)
Characterizing the climates of temperate rocky exoplanets in the era of JWST -Tad Komacek (Maryland)
Просмотров 139Год назад
Characterizing the climates of temperate rocky exoplanets in the era of JWST -Tad Komacek (Maryland)
The Ongoing Hunt to Detect the Radio Emissions of Exoplanets - Jake Turner (Cornell University)
Просмотров 161Год назад
The Ongoing Hunt to Detect the Radio Emissions of Exoplanets - Jake Turner (Cornell University)
NASA’s Europa Clipper mission to study the habitability of Europa (Alfred McEwen, UA LPL)
Просмотров 192Год назад
NASA’s Europa Clipper mission to study the habitability of Europa (Alfred McEwen, UA LPL)
Exo-Atmospheres from Ground & Space/Bioverse & Biosignatures ((M. Mansfield/K. Hardegree-Ullman; UA)
Просмотров 71Год назад
Exo-Atmospheres from Ground & Space/Bioverse & Biosignatures ((M. Mansfield/K. Hardegree-Ullman; UA)
A Multi-Wavelength Perspective on Planet Formation Conditions - Catherine Espaillat (Boston U)
Просмотров 5 тыс.Год назад
A Multi-Wavelength Perspective on Planet Formation Conditions - Catherine Espaillat (Boston U)
Probing Young Planet Population with 3D Self-Consistent Thermodynamics - Shangjia Zhang (UNLV)
Просмотров 162Год назад
Probing Young Planet Population with 3D Self-Consistent Thermodynamics - Shangjia Zhang (UNLV)
Bioverse and the Habitable Zone Hypothesis - Martin Schlecker (UA/SO/Alien Earths Team)
Просмотров 133Год назад
Bioverse and the Habitable Zone Hypothesis - Martin Schlecker (UA/SO/Alien Earths Team)
Dust Evolution in the Dense Infrared-Dark Clouds - Wanggi Lim (IPAC/Caltech)
Просмотров 80Год назад
Dust Evolution in the Dense Infrared-Dark Clouds - Wanggi Lim (IPAC/Caltech)
Trends on Irradiated Brown Dwarfs w/ Phase-resolved HST/WFC3 Spectroscopy - Rachael Amaro (SO/UA)
Просмотров 41Год назад
Trends on Irradiated Brown Dwarfs w/ Phase-resolved HST/WFC3 Spectroscopy - Rachael Amaro (SO/UA)

Комментарии

  • @zhavlan1258
    @zhavlan1258 Месяц назад

    Hello. My name is Zhavlan, I am from Almaty. New physics experiment has no problem observing scientific discoveries. The problem is with people of science, are they ready to lose authority; as popularizers of science, as academicians, Nobel laureates... For the sake of the ecology of our planet, I ask you to help carry out work on new experiences. New technologies remove limitations in direct physical measurements of gravitons. 🆘! More than $13 billion in environmental losses could be avoided. We are looking for help and hope for your courage to protect the nature of our planet. Construction of gravitational wave detectors is underway in China and India. There is also the launch of heavy rockets with interplanetary satellites, such as LISA and so on, not counting other resources. We need physicists who understand the difference between direct physical experience and indirect one. In the past, the Light Ether Theory had many indirect confirmations and even greater recognition from elite physicists, well, as is fashionable now; Einstein's theory of relativity. And as soon as Michelson conducted a direct experiment, the popularity of physics changed. Now a question for you: can you refer to direct experience in determining the constant speed of light? New hollow optical fiber technology allows even schoolchildren to do this. Using the Michelson-Morley Hybrid Gyro device... We will see this “Light is the ordered vibration of gravitational quanta, and the dominant gravitational fields adjust the speed of light in a vacuum.” If the device is in zero gravity and at rest relative to the dominant gravitational field, the difference in the path of light is zero. When registering gravitational waves, the noise is 99.99%, and the useful signal is 0.01% - correct. Large corporations benefit from such devices. When registering gravitational quanta, the possibility of receiving a useful signal is 75%; the noise will be 25% - the device needs improvement, Einstein dreamed of such a device.

  • @leezebede4469
    @leezebede4469 2 месяца назад

    7:39

  • @zhavlan1258
    @zhavlan1258 2 месяца назад

    Всех благ Вашему каналу. Физики ❤есть которые понимают разницу, между прямым физическим опытом и косвенным? В прошлом у *теории светового эфира* было очень много косвенных подтверждений и ещё больше признаний от элиты физиков, ну как в наше время модно СТО Эйнштейна. И стоило проделать прямой опыт Майкельсону, как популярность физики изменилась. Теперь к Вам вопрос. Вы можете сослаться на прямой опыт по определению константы скорости света? Современные технологии оптического волокна позволяют на *прямом опыте* проделывать это даже школьникам. Два варианта приборов предложены в предыдущем коммент… И мы увидим что "Свет - это упорядоченная вибрация гравитационных квантов и доминантные гравитационные поля корректируют скорость света в вакууме" у приборов в невесомости и в покое относительно Доминантного Гравитационного Поля, разница в проходе пути светом - ноль. Если поможете то Мы сможем *значительно* помочь экологии а для большой науки, сэкономить большие ресурсы. В Китае и Индии в плане строительства детекторов Гравитационных Волн. Также есть запуск тяжёлых ракет с межпланетными спутниками, типа LISA и так далее. Это более 4 миллиард $, не считая других ресурсов. При регистрации гравитационных волн на шумы приходится 99,99% а на полезный сигнал 0,01% - нуждается в поправке. При регистрации квантов гравитации возможность получать полезный сигнал 75% на шумы будет приходится 25% - нуждается в улучшении.

  • @zhavlan1258
    @zhavlan1258 2 месяца назад

    Всех благ Вашему каналу. Физики ❤ есть которые понимают разницу, между прямым физическим опытом и косвенным? В прошлом у *теории светового эфира* было очень много косвенных подтверждений и ещё больше признаний от элиты физиков, ну как в наше время модно СТО Эйнштейна. И стоило проделать прямой опыт Майкельсону, как популярность физики изменилась. Теперь к Вам вопрос. Вы можете сослаться на прямой опыт по определению константы скорости света? Современные технологии оптического волокна позволяют на *прямом опыте* проделывать это даже школьникам. Два варианта приборов предложены в предыдущем коммент… И мы увидим что "Свет - это упорядоченная вибрация гравитационных квантов и доминантные гравитационные поля корректируют скорость света в вакууме" у приборов в невесомости и в покое относительно Доминантного Гравитационного Поля, разница в проходе пути светом - ноль. Если поможете то Мы сможем *значительно* помочь экологии а для большой науки, сэкономить большие ресурсы. В Китае и Индии в плане строительства детекторов Гравитационных Волн. Также есть запуск тяжёлых ракет с межпланетными спутниками, типа LISA и так далее. Это более 4 миллиард $, не считая других ресурсов. При регистрации гравитационных волн на шумы приходится 99,99% а на полезный сигнал 0,01% - нуждается в поправке. При регистрации квантов гравитации возможность получать полезный сигнал 75% на шумы будет приходится 25% - нуждается в улучшении.

  • @zhavlan1258
    @zhavlan1258 2 месяца назад

    Всех благ Вашему каналу. Физики есть ❤ которые понимают разницу, между прямым физическим опытом и косвенным? В прошлом у *теории светового эфира* было очень много косвенных подтверждений и ещё больше признаний от элиты физиков, ну как в наше время модно СТО Эйнштейна. И стоило проделать прямой опыт Майкельсону, как популярность физики изменилась. Теперь к Вам вопрос. Вы можете сослаться на прямой опыт по определению константы скорости света? Современные технологии оптического волокна позволяют на *прямом опыте* проделывать это даже школьникам. Два варианта приборов предложены в предыдущем коммент… И мы увидим что "Свет - это упорядоченная вибрация гравитационных квантов и доминантные гравитационные поля корректируют скорость света в вакууме" у приборов в невесомости и в покое относительно Доминантного Гравитационного Поля, разница в проходе пути светом - ноль. Если поможете то Мы сможем *значительно* помочь экологии а для большой науки, сэкономить большие ресурсы. В Китае и Индии в плане строительства детекторов Гравитационных Волн. Также есть запуск тяжёлых ракет с межпланетными спутниками, типа LISA и так далее. Это более 4 миллиард $, не считая других ресурсов. При регистрации гравитационных волн на шумы приходится 99,99% а на полезный сигнал 0,01% - нуждается в поправке. При регистрации квантов гравитации возможность получать полезный сигнал 75% на шумы будет приходится 25% - нуждается в улучшении.

  • @ZhanMorli
    @ZhanMorli 7 месяцев назад

    Hello. With the help of the “HYBRID gyroscope” you can make scientific discoveries; in astronomy, astrophysics, cosmology, higher theoretical physics,... I am writing to you with a proposal for the joint invention of a HYBRID gyroscope from non-circular, TWO coils with a new type of optical fiber with a “hollow core photonic-substituted vacuum zone or (NANF)” where - the light travels 48000 meters in each arm, while it does not exceed the parameters 40/40/40 cm, and the weight is 4 kg. Manufacturers of “Fiber Optic Gyroscopes” can produce HYBRID gyroscopes for educational and practical use in schools and higher education institutions. Einstein dreamed of measuring the speed of a train, an airplane - through the Michelson-Morley experiment of 1881/2024, and only then would the experiment be more than 70% complete. This can be done using a fiber optic HYBRID gyroscope. Based on the completion of more than 70% of Michelson's experiment, the following postulates can be proven: Light is an ordered vibration of gravitational quanta, and dominant gravitational fields adjust the speed of light in a vacuum. (We are not looking for ether, we will see the work of gravitational quanta) The result is a «theory of everything» in a simple teaching device and a new tape measure for measuring the universe.

  • @foamersimpson6690
    @foamersimpson6690 10 месяцев назад

    Not sure if I buy this.

  • @ATwoBitUniverse
    @ATwoBitUniverse 11 месяцев назад

    ❤🌌

  • @originsseminarsandeostalks4264
    @originsseminarsandeostalks4264 2 года назад

    51:00 Speaker correction: The diameter of the impactor should be 400m instead of 800m.