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The first interstellar object observed in our solar system, 1I/`Oumuamua, exhibited several peculiar properties, including extreme elongation and non-gravitational acceleration. Bergner and Seligman (hereafter BS23) proposed that…

Astrophysics of Galaxies · Physics 2023-07-19 Thiem Hoang , Abraham Loeb

As part of the NASA Starlight collaboration, we look at the implications of radiation effects from impacts with the interstellar medium (ISM) on a directed energy driven relativistic spacecraft. The spacecraft experiences a stream of…

Investigating the bubbles generated by the interaction between asymptotic giant branch stellar outflows and the interstellar medium (ISM) is pivotal for elucidating the mechanism by which evolved low- to intermediate-mass stars enrich the…

Solar and Stellar Astrophysics · Physics 2025-09-30 Jun-Yang Liu , Yong Zhang , Xu-Jia Ouyang

The circumgalactic medium (CGM) of nearby star-forming galaxies show clear indications of \ion{O}{6} absorption accompanied by little to no \ion{N}{5} absorption. This unusual spectral signature, accompanied by absorption from lower…

Astrophysics of Galaxies · Physics 2018-09-17 Edward Buie , William Gray , Evan Scannapieco

Relativistic jets are believed to have a substantial impact on the gas dynamics and evolution of the interstellar medium (ISM) of their host galaxies. In this paper, we aim to draw a link between the simulations and the observable…

The Yarkovsky--O'Keefe--Radzievskii--Paddack (YORP) effect governs the spin evolution of small asteroids. The axial component of YORP, which alters the rotation rate of the asteroid, is mostly independent of its thermal inertia, while the…

Earth and Planetary Astrophysics · Physics 2021-06-23 Oleksiy Golubov , Vladyslav Unukovych , Daniel J. Scheeres

Asteroid collisions are one of the main processes responsible for the evolution of bodies in the main belt. Using observations of the Dimorphos impact by the DART spacecraft, we estimate how asteroid collisions in the main belt may look in…

Earth and Planetary Astrophysics · Physics 2024-03-07 E. O. Ofek , D. Polishook , D. Kushnir , G. Nir , S. Ben-Ami , Y. Shvartzvald , N. L. Strotjohann , E. Segre , A. Blumenzweig , M. Engel , D. Bodewits , J. W. Noonan

The cycling of material from the interstellar medium (ISM) into stars and the return of stellar ejecta into the ISM is the engine that drives the "galactic ecology" in normal spirals, a cornerstone in the formation and evolution of galaxies…

The spin state of small asteroids can change on a long timescale by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, the net torque that arises from anisotropically scattered sunlight and proper thermal radiation from an…

Comets and asteroids have long captured human curiosity, and until recently, all documented examples belonged to our Solar System. That changed with the discovery of the first known interstellar object, 1I/2017 U1 ('Oumuamua), in 2017. Two…

Earth and Planetary Astrophysics · Physics 2025-04-03 Josep M. Trigo-Rodríguez , Damya Souami , Maria Gritsevich , Marcin Wesołowski , Gennady Borisov

We obtained thorough photometric observations of two binary near-Earth asteroids (66391) Moshup = 1999 KW4 and (88710) 2001 SL9 taken from 2000 to 2019 and derived physical and dynamical properties of the binary systems. We found that the…

Using no conventional measurements in position space, information extraction rates exceeding one bit per photon are achieved by employing high-dimensional correlated orbital angular momentum (OAM) states for object recognition. The…

Quantum Physics · Physics 2015-03-23 Casey A. Fitzpatrick , David S. Simon , Alexander V. Sergienko

The subject of this work is the physical characterization of asteroids, focusing on the thermal inertia of near-Earth asteroids (NEAs). Thermal inertia governs the Yarkovsky effect, a non-gravitational force which significantly alters the…

Earth and Planetary Astrophysics · Physics 2012-08-21 Michael Mueller

Evidence for a transitional stage in the formation of a low-mass star is reported, intermediate between the fully embedded and the T Tauri phases. Millimeter aperture synthesis observations in the HCO+ J=1-0 and 3-2, HCN 1-0, 13CO 1-0, and…

Astrophysics · Physics 2009-11-06 Michiel R. Hogerheijde

The origin of the interstellar object 1I/'Oumuamua has defied explanation. We perform calculations of the non-gravitational acceleration that would be experienced by bodies composed of a range of different ices and demonstrate that a body…

Earth and Planetary Astrophysics · Physics 2021-06-02 Alan P. Jackson , Steven J. Desch

Gravitational instabilities play an important role in galaxy evolution and in shaping the interstellar medium (ISM). The ISM is observed to be highly turbulent, meaning that observables like the gas surface density and velocity dispersion…

Astrophysics of Galaxies · Physics 2015-06-23 Oscar Agertz , Alessandro B. Romeo , Kearn Grisdale

The angular momentum (AM) content of massive stellar cores helps to determine the natal spin rates of neutron stars and black holes. Asteroseismic measurements of low-mass stars have proven that stellar cores rotate slower than predicted by…

High Energy Astrophysical Phenomena · Physics 2022-02-16 Jim Fuller , Wenbin Lu

We explore the impact of diffusive cosmic rays (CRs) on the evolution of the interstellar medium (ISM) under varying assumptions of supernova explosion environment. In practice, we systematically vary the relative fractions of supernovae…

Astrophysics of Galaxies · Physics 2022-12-28 Christine M. Simpson , Rüdiger Pakmor , Christoph Pfrommer , Simon C. O. Glover , Rowan Smith

Interstellar space is filled with a dilute mixture of charged particles, atoms, molecules and dust grains, called the interstellar medium (ISM). Understanding its physical properties and dynamical behavior is of pivotal importance to many…

Astrophysics of Galaxies · Physics 2014-12-18 Ralf S. Klessen , Simon C. O. Glover

We calculate accretion mass of interstellar objects (ISOs) like `Oumuamua onto low-mass population III stars (Pop.~III survivors), and estimate surface pollution of Pop.~III survivors. An ISO number density estimated from the discovery of…

Solar and Stellar Astrophysics · Physics 2018-07-18 Ataru Tanikawa , Takeru K. Suzuki , Yasuo Doi
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