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The 18 May 2024 superbolide over the Iberian Peninsula: USG space sensors and ground-based independent observations 2024 年 5 月 18 日伊比利亚半岛上空的超级大暴雨：美国政府空间传感器和地面独立观测数据
arXiv - PHYS - Popular Physics Pub Date : 2024-05-23 DOI: arxiv-2405.15024
Eloy Peña-Asensio, Pau Grèbol-Tomàs, Josep M. Trigo-Rodríguez, Pablo Ramírez-Moreta, Rainer Kresken
{"title":"The 18 May 2024 superbolide over the Iberian Peninsula: USG space sensors and ground-based independent observations","authors":"Eloy Peña-Asensio, Pau Grèbol-Tomàs, Josep M. Trigo-Rodríguez, Pablo Ramírez-Moreta, Rainer Kresken","doi":"arxiv-2405.15024","DOIUrl":"https://doi.org/arxiv-2405.15024","url":null,"abstract":"On 18 May 2024, a superbolide traversed the western part of the Iberian\u0000Peninsula, culminating its flight over the Atlantic Ocean and generating\u0000significant media attention. This event was caused by a weak carbonaceous\u0000meteoroid of 93.0$pm$0.8 cm, with a density of 1613$pm$12 kg,m$^{-3}$,\u0000entering the atmosphere at 40.1$pm$0.4 km,s$^{-1}$ with an angle of\u000010.93$pm$0.02$^circ$. The luminous phase started at 137.88$pm$0.05 km and\u0000ended at an altitude of 53.78$pm$0.07 km. The meteoroid's heliocentric orbit\u0000was characterized by an inclination of 14.42$pm$0.23$^circ$, a high\u0000eccentricity of 0.950$pm$0.004, a semi-major axis of 2.31$pm$0.13 au, and a\u0000notably short perihelion distance of 0.116$pm$0.003 au. The superbolide was\u0000recorded by multiple ground-based stations of the Spanish Meteor Network\u0000(SPMN), the European Space Agency (ESA), and the U.S. Government (USG) space\u0000sensors. Our analysis shows a good agreement with the radiant and velocity data\u0000reported by the Center for Near-Earth Object Studies (CNEOS), with a deviation\u0000of 1.6$^circ$ and -0.4 km,s$^{-1}$, respectively. Due to the absence of\u0000observable deceleration, we successfully reconciled satellite radiometric data\u0000with a purely dynamic atmospheric flight model, constraining the meteoroid's\u0000mass and coherently fitting its velocity profile.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Breaking news on last achievements on the definition of the black-body total internal energy 关于黑体总内能定义最新成果的即时新闻
arXiv - PHYS - Popular Physics Pub Date : 2024-05-20 DOI: arxiv-2405.15806
Lino Reggiani, Eleonora Alfinito
{"title":"Breaking news on last achievements on the definition of the black-body total internal energy","authors":"Lino Reggiani, Eleonora Alfinito","doi":"arxiv-2405.15806","DOIUrl":"https://doi.org/arxiv-2405.15806","url":null,"abstract":"The internal total-energy of the black-body is a physical quantity of\u0000paramount importance in the development of modern physics. Accordingly,\u0000together with a brief historical development, we report and comment last\u0000breaking news (2018-2024) concerning the definition and properties of this\u0000quantity. The first comment concerns with the inclusion of the Casimir energy\u0000that avoids the vacuum catastrophe implied by he presence of zero-point energy,\u0000thus leading to further quantum contributions associated with boundary effects.\u0000The second comment concerns with a semi-classical simulation of a one\u0000dimensional black-body whose results suggest a possible reconsideration on the\u0000role of classical physics on the quantum black-body.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Introducing the Exoplanet Escape Factor and the Fishbowl Worlds (Two conceptual tools for the search of extra terrestrial civilizations) 介绍系外行星逃逸因子和鱼缸世界（寻找地外文明的两个概念工具）
arXiv - PHYS - Popular Physics Pub Date : 2024-05-11 DOI: arxiv-2405.08018
Elio Quiroga Rodriguez
{"title":"Introducing the Exoplanet Escape Factor and the Fishbowl Worlds (Two conceptual tools for the search of extra terrestrial civilizations)","authors":"Elio Quiroga Rodriguez","doi":"arxiv-2405.08018","DOIUrl":"https://doi.org/arxiv-2405.08018","url":null,"abstract":"The search for extraterrestrial intelligence on exoplanets is a rich field of\u0000conceptual exploration. Author introduces two definitions that could help to\u0000narrow down the possibilities that an extraterrestrial civilization may or may\u0000not have initiated exploration of its own star system and beyond. It is\u0000concluded that in some cases certain extraterrestrial civilizations may not be\u0000able to leave their home worlds to biological extinction, purely because of\u0000physical limitations.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141064224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum Error Correction for Kids 儿童量子纠错
arXiv - PHYS - Popular Physics Pub Date : 2024-05-10 DOI: arxiv-2405.06795
Richard A. Wolf
{"title":"Quantum Error Correction for Kids","authors":"Richard A. Wolf","doi":"arxiv-2405.06795","DOIUrl":"https://doi.org/arxiv-2405.06795","url":null,"abstract":"No one should wait until college to get acquainted with core concepts of\u0000quantum information. Given the human bias of favouring the familiar over the\u0000unknown, early exposure to concepts of quantum information helps learners build\u0000stronger appetence for the field, as well as allowing them to develop an\u0000intuitive approach to it. In this work, I present an intuitive gamified\u0000approach to one of the core concepts in quantum error correction: the\u0000stabiliser formalism.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140936504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Demystifying Arrow of Time 解密时间之箭
arXiv - PHYS - Popular Physics Pub Date : 2024-05-09 DOI: arxiv-2405.15796
Zura Kakushadze
{"title":"Demystifying Arrow of Time","authors":"Zura Kakushadze","doi":"arxiv-2405.15796","DOIUrl":"https://doi.org/arxiv-2405.15796","url":null,"abstract":"Scientific discussions of the arrow of time often get quite confusing due to\u0000highly complex systems they deal with. Popular literature then often coveys\u0000messages that tend to get lost in translation. The purpose of this note is to\u0000demystify the arrow of time by stripping off the unnecessary complexities and\u0000thereby simplifying the discussion. We do this by providing examples that are\u0000exactly solvable and make it easy to see the root cause of the apparent\u0000\"time-irreversibility\". We also discuss \"time-reversal\" solutions, where the\u0000initial state evolves such that it reaches the state which is the same as the\u0000initial state moving backward in time. These solutions are simple enough to be\u0000comprehensible to a highschooler. We discuss the arrow of time both in the\u0000classical and quantum settings, including in the cosmological context.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chirality in rotating nuclei 旋转原子核的手性
arXiv - PHYS - Popular Physics Pub Date : 2024-05-08 DOI: arxiv-2405.05986
S. Frauendorf
{"title":"Chirality in rotating nuclei","authors":"S. Frauendorf","doi":"arxiv-2405.05986","DOIUrl":"https://doi.org/arxiv-2405.05986","url":null,"abstract":"The article explains on a non-expert level how triaxial rotating nuclei may\u0000attain a chiral structure.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140936503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detectability of Solar Panels as a Technosignature 作为技术特征的太阳能电池板的可探测性
arXiv - PHYS - Popular Physics Pub Date : 2024-05-07 DOI: arxiv-2405.04560
Ravi Kopparapu, Vincent Kofman, Jacob Haqq-Misra, Vivaswan Kopparapu, Manasvi Lingam
{"title":"Detectability of Solar Panels as a Technosignature","authors":"Ravi Kopparapu, Vincent Kofman, Jacob Haqq-Misra, Vivaswan Kopparapu, Manasvi Lingam","doi":"arxiv-2405.04560","DOIUrl":"https://doi.org/arxiv-2405.04560","url":null,"abstract":"In this work, we assess the potential detectability of solar panels made of\u0000silicon on an Earth-like exoplanet as a potential technosignature.\u0000Silicon-based photovoltaic cells have high reflectance in the UV-VIS and in the\u0000near-IR, within the wavelength range of a space-based flagship mission concept\u0000like the Habitable Worlds Observatory (HWO). Assuming that only solar energy is\u0000used to provide the 2022 human energy needs with a land cover of ~2.4%, and\u0000projecting the future energy demand assuming various growth-rate scenarios, we\u0000assess the detectability with an 8 m HWO-like telescope. Assuming the most\u0000favorable viewing orientation, and focusing on the strong absorption edge in\u0000the ultraviolet-to-visible (0.34 - 0.52 um), we find that several 100s of hours\u0000of observation time is needed to reach a SNR of 5 for an Earth-like planet\u0000around a Sun-like star at 10pc, even with a solar panel coverage of ~23% land\u0000coverage of a future Earth. We discuss the necessity of concepts like Kardeshev\u0000Type I/II civilizations and Dyson spheres, which would aim to harness vast\u0000amounts of energy. Even with much larger populations than today, the total\u0000energy use of human civilization would be orders of magnitude below the\u0000threshold for causing direct thermal heating or reaching the scale of a\u0000Kardashev Type I civilization. Any extraterrrestrial civilization that likewise\u0000achieves sustainable population levels may also find a limit on its need to\u0000expand, which suggests that a galaxy-spanning civilization as imagined in the\u0000Fermi paradox may not exist.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140936497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Did the Big Bang and cosmic inflation really happen? (A tale of alternative cosmological models) 宇宙大爆炸和宇宙膨胀真的发生了吗？(另类宇宙学模型的故事）
arXiv - PHYS - Popular Physics Pub Date : 2024-04-29 DOI: arxiv-2404.18503
Marcin Postolak
{"title":"Did the Big Bang and cosmic inflation really happen? (A tale of alternative cosmological models)","authors":"Marcin Postolak","doi":"arxiv-2404.18503","DOIUrl":"https://doi.org/arxiv-2404.18503","url":null,"abstract":"A popular science article designed to introduce people familiar with basic\u0000cosmological nomenclature with models alternative to cosmological inflation.\u0000The paper briefly discusses the modern view of the Big Bang model, inflation\u0000(both its advantages and potential deficiencies). This is followed by a\u0000discussion of historical alternative models and modern approaches such as\u0000matter bounce, ekpyrotic Universe, Conformal Cyclic Cosmology, Hartle-Hawking\u0000state and loop quantum cosmology. The final aspect of the paper is to present\u0000the advantages and potential problems associated with alternative models and to\u0000present the conceptual challenges associated with the uniqueness of cosmology\u0000as a specific domain of physics.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140828403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reflections on the denialism of the Earth's curvature based on the general public participation in the collective reproduction of Eratosthenes' experiment 基于公众参与埃拉托斯特尼实验的集体再现对否认地球曲率的思考
arXiv - PHYS - Popular Physics Pub Date : 2024-04-18 DOI: arxiv-2404.12202
Karen Luz Burgoa Rosso, José Alberto Casto Nogales Vera, Ana Eliza Ferreira Alvim Silva
{"title":"Reflections on the denialism of the Earth's curvature based on the general public participation in the collective reproduction of Eratosthenes' experiment","authors":"Karen Luz Burgoa Rosso, José Alberto Casto Nogales Vera, Ana Eliza Ferreira Alvim Silva","doi":"arxiv-2404.12202","DOIUrl":"https://doi.org/arxiv-2404.12202","url":null,"abstract":"In this paper, we propose the replication of scientific experiments, with the\u0000participation of the general public, as one of the possible strategies to\u0000confront science deniers. Using the social media of the Federal University of\u0000Lavras (UFLA), the project entitled : The Magic of Physics and the Universe,\u0000invited the public to reproduce the experiment carried out by the Greek\u0000Eratosthenes over 2,100 years ago, which he proved that the Earth is spherical.\u0000We present a report of this experience to suggest that it is possible for\u0000citizens to experience scientific knowledge and observe the phenomena in a\u0000simple way, in order to develop a critical interpretation of false information\u0000that circulates in society. This proposal distinctively geeks to deconstruct\u0000the denial of the Earth's curvature through direct and collective participation\u0000of citizens in Eratosthenes' experiment, which permit more reflection on how\u0000the scientific method used to study this subject works.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermographic study of freezing water drops: An insight on Mpemba effect 冰冻水滴的热成像研究：对姆彭巴效应的认识
arXiv - PHYS - Popular Physics Pub Date : 2024-04-17 DOI: arxiv-2404.11684
Argelia Balbuena Ortega, Emiliano Hernández-Figueroa, J. Antonio del Río
{"title":"Thermographic study of freezing water drops: An insight on Mpemba effect","authors":"Argelia Balbuena Ortega, Emiliano Hernández-Figueroa, J. Antonio del Río","doi":"arxiv-2404.11684","DOIUrl":"https://doi.org/arxiv-2404.11684","url":null,"abstract":"Despite decades of research, the Mpemba Effect challenges scientists,\u0000prompting further investigation and refinement of existing hypotheses. This\u0000work uses optical tools such as thermography to analyze and study the Mpemba\u0000effect on drops. We analyze times and contact angle changes with temperature\u0000with an easily controlled experiment. This work contributes to the ongoing\u0000discourse surrounding the Mpemba Effect, emphasizing the need for\u0000interdisciplinary collaboration and experimental rigor to unravel the\u0000complexities of this intriguing phenomenon. A deeper understanding of the\u0000Mpemba Effect enhances our knowledge of thermodynamics and fluid dynamics and\u0000opens avenues for practical applications in fields such as cryopreservation,\u0000meteorology, and materials science.","PeriodicalId":501348,"journal":{"name":"arXiv - PHYS - Popular Physics","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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