Results 91 to 100 of about 658,780 (159)

NE2025: An Updated Electron Density Model for the Galactic Interstellar Medium

The Astrophysical Journal
Free electrons in the Galactic interstellar medium (ISM) disperse and scatter coherent radio waves, by amounts that depend on the distance to the radio source.
Stella Koch Ocker, James M. Cordes
doaj   +1 more source

Visible/UV Scattering by Interstellar Dust [PDF]

Symposium - International Astronomical Union, 1989
Studies of interstellar dust based on observations of scattered and dust-emitted radiation from grains are reviewed.
openaire   +1 more source

Redeveloping a CLEAN Deconvolution Algorithm for Scatter-broadened Radio Pulsar Signals

The Astrophysical Journal
Broadband radio waves emitted from pulsars are distorted and delayed as they propagate toward the Earth due to interactions with the free electrons that compose the interstellar medium (ISM), with lower radio frequencies being more impacted than higher ...
Olivia Young, Michael T. Lam
doaj   +1 more source

3 Interstellar Ram Jets

, 2016
Published in Proceedings of TVIW 2016, February 28-March 2, Chattanooga, TN / David E. Fields and Abby SherriffThe mass ratio problem in interstellar flight presents a major problem.
Jackson, Albert Allen
core  

The NANOGrav nine-year data set: Monitoring interstellar scattering delays

, 2016
We report on an effort to extract and monitor interstellar scintillation parameters in regular timing observations collected for the North American Nanohertz Observatory for Gravitational Waves pulsar timing array.
Lazio, T., Demorest, P., Fonseca, Emmanuel, Chatterjee, Shami, Cordes, James M., Ransom, Scott M., Zhu, W. W., Nice, D. J., Arzoumanian, Zaven, Jones, M., Lam, M., Ellis, Justin A., Ellis, J., Ellis, J. A., Palliyaguru, N., Swiggum, J., Pennucci, T., Stinebring, D. R., McLaughlin, M. A., Zhu, Weiwei, Levin, L., Stinebring, D., Crowter, K., Stinebring, Daniel R., Stairs, Ingrid H., Stovall, Kevin, Dolch, T., Lazio, T. Joseph W., Demorest, Paul B., Ransom, S., Stovall, K., Swiggum, Joseph K., Nice, D., McLaughlin, Maura A., Crowter, Kathryn, Jones, G., Cordes, J. M., Levin, Lina, Ransom, S. M., Gonzalez, M. E., Jones, M. L., Jones, Glenn, Ferdman, Robert D., Pennucci, Timothy T., Cordes, J., Ferdman, R., Demorest, P. B., Lazio, T. J. W., Gonzalez, M., Lam, Michael T., Pennucci, Timothy Thomas, Stairs, I., Chatterjee, S., Nice, David J., Stairs, I. H., Gonzalez, Marjorie E., Jones, Megan L., McLaughlin, M., Arzoumanian, Z., Fonseca, E., Dolch, Timothy, Ferdman, R. D., Lam, M. T., Swiggum, J. K., Palliyaguru, Nipuni, Zhu, W.   +65 more
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A detailed study of the reflection nebula, NGC 7023 [PDF]

, 1982
Polarisation and intensity maps in three broad wavebands are presented for the reflection nebula NGC7023. The data are used to investigate the structure, dust distribution and grain characteristics of the material surrounding the central illuminating ...
Moore, Philip Joseph Ruaraigh McDonald
core  

Transient Blurring of the Scintillation Arc of Pulsar B1737+13

The Astrophysical Journal
For many pulsars, the scattering structures responsible for scintillation are typically dominated by a single, thin screen along the line of sight, which persists for years or decades.
Yen-Hua Chen, Sammy Siegel, Daniel Baker, Ue-Li Pen, Dan Stinebring   +4 more
doaj   +1 more source

Precise Measurements of TeV Halos around Geminga and Monogem Pulsars with HAWC

The Astrophysical Journal
We present the most precise measurements to date for the spatial extension and energy spectrum of the γ -ray region between a pulsar’s wind nebula and the interstellar medium, better known as the halo, present around Geminga and PSR B0656+14 (Monogem ...
A. Albert, R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, A. Bernal, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, U. Cotti, J. Cotzomi, S. Coutiño de León, E. de la Fuente, D. Depaoli, N. Di Lalla, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, M. Durocher, J. C. Díaz-Vélez, K. Engel, C. Espinoza, K. L. Fan, K. Fang, N. Fraija, J. A. García-González, F. Garfias, H. Goksu, M. M. González, J. A. Goodman, S. Groetsch, J. P. Harding, S. Hernández-Cadena, I. Herzog, P. Hüntemeyer, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, W. H. Lee, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Montes, J. A. Morales-Soto, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, H. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, G. Schwefer, J. Serna-Franco, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Urea-Mena, E. Varela, L. Villaseñor, X. Wang, I. J. Watson, E. Willox, H. Wu, S. Yun-Cárcamo, H. Zhou, C. de León, HAWC Collaboration, M. Di Mauro   +94 more
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Pulsar scintillation studies with LOFAR

Astronomy & Astrophysics
Context. The interstellar scintillation observed in radio pulsars arises from interference between electromagnetic waves scattered by electron density fluctuations in the turbulent interstellar plasma, providing a critical tool for probing the small ...
Cai Yanqing, Wu Ziwei, Zhu Weiwei, Verbiest Joris P. W., Liu Yulan, Moochickal Ambalappat Krishnakumar, Brüggen Marcus, Ciardi Benedetta, Dettmar Ralf-Jürgen, Fang Ziyao, Fu Qiuyang, Hoeft Matthias, Jin Jiawei, Künkel Lars, Künsemöller Jörn, Liu Caisong, Meng Lingqi, Miao Xueli, Niu Jiarui, Rejep Rukiya, Schwarz Dominik J., Shaifullah Golam M., Tiburzi Caterina, Vocks Christian, Wucknitz Olaf, Xue Mengyao, Yuan Mao, Yue Youling, Zhang Chunfeng, Zhang Zhen   +29 more
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Probing the Interstellar Medium from Scintillation of the Swooshing Pulsar B0919+06

The Astrophysical Journal
Radio observations of pulsars offer a potential method to probe the intricate microstructure in the turbulent interstellar medium. Here we report on a high-resolution dynamic spectral analysis of the “swooshing pulsar” B0919+06 observed with the Five ...
Z. Wang, Z. G. Wen, J. P. Yuan, N. Wang, Z. Wang, J. L. Chen, H. G. Wang, W. Han, H. Wang, X. F. Duan, C. B. Lyu, J. P. Wang, Z. W. Wu   +12 more
doaj   +1 more source