Results 71 to 80 of about 35,066 (146)

Multi-wavelength Signatures of Cosmic Rays in the Milky Way

, 2017
Cosmic rays (CRs) propagate in the Milky Way and interact with the interstellar medium and magnetic fields. These interactions produce emissions that span the electromagnetic spectrum, and are an invaluable tool for understanding the intensities and ...
Harrington, P., Orlando, E., Strong, A. W.   +2 more
core   +1 more source

Step‐by‐Step Towards Biological Homochirality – from Prebiotic Randomness To Perfect Asymmetry

Chemistry – An Asian Journal, Volume 20, Issue 1, January 2, 2025.
This review focuses on the theories related to the emergence of biological homochirality, from assembly of building blocks at the monomer level, to polymerization into functional homochiral biopolymers. Abstract The history of life's formation and the origin of its stereochemistry are nearly as multifaceted as the life itself.
Ivana Mejdrová, Ewa Węgrzyn, Thomas Carell   +2 more
wiley   +1 more source

Detection of microgauss coherent magnetic fields in a galaxy five billion years ago

, 2017
Magnetic fields play a pivotal role in the physics of interstellar medium in galaxies, but there are few observational constraints on how they evolve across cosmic time.
Basu, A., Beck, R., Carilli, C., Gaensler, B. M., Keeton, C., Kronberg, P. P., Mao, S. A., Wucknitz, O., Zweibel, E.   +8 more
core   +1 more source

Chemical telemetry of OH observed to measure interstellar magnetic fields

, 2005
We present models for the chemistry in gas moving towards the ionization front of an HII region. When it is far from the ionization front, the gas is highly depleted of elements more massive than helium.
A. Allen, A.J. Walsh, A.J.B. Downes, E. Keto, H.J. Habing, J.P. Williams, K.M. Menten, K.M. Menten, M. Elitzur, M.D. Gray, P. Caselli, P.P. Papadopoulos, Philip C. Myers, R.M. Crutcher, S. Viti, Serena Viti, T. Stantcheva, T.J. Millar, T.L. Bourke, T.W. Hartquist, T.W. Hartquist, Thomas W. Hartquist, Y.H. Le Teuff   +22 more
core   +2 more sources

The Huge Magnetic Toroids in the Milky Way Halo

The Astrophysical Journal
The magnetic fields in our Milky Way can be revealed by the distribution of Faraday rotation measures (RMs) of radio sources behind the Galaxy and of radio pulsars inside the Galaxy. Based on the antisymmetry of the Faraday sky in the inner Galaxy to the
J. Xu, J. L. Han
doaj   +1 more source

Concerning the origin of the magnetic fields on stars and in interstellar space [PDF]

Origin of magnetic fields on stars and in interstellar ...
Biermann, L.
core   +1 more source

Turbulence in the Star-forming Interstellar Medium: Steps toward Constraining Theories with Observations

, 2003
Increasingly sophisticated observational tools and techniques are now being developed for probing the nature of interstellar turbulence. At the same time, theoretical advances in understanding the nature of turbulence and its effects on the structure of ...
Heyer, Mark, Zweibel, Ellen
core   +1 more source

Most-likely DCF Estimates of Magnetic Field Strength

The Astrophysical Journal
The Davis–Chandrasekhar–Fermi (DCF) method is widely used to evaluate magnetic fields in star-forming regions. Yet it remains unclear how well DCF equations estimate the mean plane-of-the-sky field strength in a map region. To address this question, five
Philip C. Myers, Ian W. Stephens, Simon Coudé   +2 more
doaj   +1 more source

Astrophysical turbulence modeling

, 2011
The role of turbulence in various astrophysical settings is reviewed. Among the differences to laboratory and atmospheric turbulence we highlight the ubiquitous presence of magnetic fields that are generally produced and maintained by dynamo action.
Alexandrova O, Allende Prieto C, Antia H M, Asplund M, Axel Brandenburg, Bahcall J N, Bahcall J N, Bahcall J N, Ballot J, Barge P, Bate M R, Benevolenskaya E E, Beresnyak A, Berezinskii V S, Binney J, Boldyrev S, Boldyrev S, Boldyrev S, Boldyrev S, Bonnor W B, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A, Brandenburg A Kuroda T, Brown B P, Brummell N H, Brun A S, Brun A S, Brunt C M, Brunt C M, Busse F H, Cai K, Choudhuri A R, Crutcher R M, Crutcher R M, Davidson P A, de Avillez M A, De Villiers J-P, Del Sordo F Brandenburg A, Dolag K, Durisen R H, Frank J, Frisch U, Fryxell B, Galtier S, Gammie C F, Goldreich P, Green C A, Green C A, Haugen N E L, Hawley J F, Haxton W C, Hodgson L S, Hubbard A, Hubbard A Brandenburg A, Inaba S, Inutsuka S, Iroshnikov P S, Jappsen A-K, Johansen A Oishi J S Mac Low M-M Klahr H Henning T Youdin A, Kadomtsev B B, Kitchatinov L L, Kleeorin N, Korpi M J, Krause F, Kritsuk A G, Kritsuk A G, Kritsuk A G, Kritsuk A G, Kritsuk A G, Krolik J H, Krumholz M R, Krumholz M R, Käpylä P J Korpi M J, Küker M, Larson R B, Larson R B, Lighthill M J, Lithwick Y, Lithwick Y, Mac Low M-M, Machida M, Machida M, Miesch M S, Miesch M S, Mihalas D, Mitra D, Mitra D, Moffatt H K, Nordlund Å, O'Shea B W, Padoan P, Padoan P, Padoan P, Padoan P, Padoan P, Padoan P Nordlund Å, Pan L, Parker E N, Perez J C, Ponty Y, Pouquet A Baerenzung J Pietarila Graham J Mininni P Politano H Ponty Y, Pulkkinen P, Rempel M, Rempel M, Richard O, Richtmyer R D, Rieutord M, Roettiger K, Roettiger K, Rogers T M, Ruediger G, Ruzmaikin A, Schekochihin A A, Schekochihin A A, Schekochihin A A, Shakura N I, Shore S N, Smith C W, Solanki S K, Spiegel E A, Stefani F, Stein R F, Stein R F, Steinmetz M, Stone J M, Subramanian K, Troland T H, Truelove J K, Tuominen I, Turner N J, Vishniac E T, Vishniac E T, Vázquez-Semadeni E, Wik D R, Wyngaard J C, Yusef-Zadeh F, Åke Nordlund   +143 more
core   +1 more source

Sub-Alfvénic Turbulence: Magnetic-to-kinetic Energy Ratio, Modification of Weak Cascade, and Implications for Magnetic Field Strength Measurements

The Astrophysical Journal
We study the properties of sub-Alfvénic magnetohydrodynamic (MHD) turbulence, i.e., turbulence with Alfvén mach number M _A = V _L / V _A < 1, where V _L is the velocity at the injection scale and V _A is the Alfvén velocity.
A. Lazarian, Ka Wai Ho, Ka Ho Yuen, Ethan Vishniac   +3 more
doaj   +1 more source