Zobrazeno 1 - 7
of 7
pro vyhledávání: '"D. H. Hartman"'
Autor:
J. C. Rastinejad, W. Fong, A. J. Levan, N. R. Tanvir, C. D. Kilpatrick, A. S. Fruchter, S. Anand, K. Bhirombhakdi, S. Covino, J. P. U. Fynbo, G. Halevi, D. H. Hartmann, K. E. Heintz, L. Izzo, P. Jakobsson, T. Kangas, G. P. Lamb, D. B. Malesani, A. Melandri, B. D. Metzger, B. Milvang-Jensen, E. Pian, G. Pugliese, A. Rossi, D. M. Siegel, P. Singh, G. Stratta
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 1, p 14 (2024)
The existence of a secondary (in addition to compact object mergers) source of heavy element ( r -process) nucleosynthesis, the core-collapse of rapidly rotating and highly magnetized massive stars, has been suggested by both simulations and indirect
Externí odkaz:
https://doaj.org/article/ac19908e354a449e8321b26e9d6c7bf6
Autor:
Y. Sheng, M. Rajagopal, A. Kaur, M. Ajello, A. Domínguez, A. Rau, S. B. Cenko, J. Greiner, D. H. Hartmann, I. Cox, S. Joffre, C. Karwin, A. McDaniel, R. Silver, N. Torres-Albà
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 63 (2024)
BL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a challenge in measuring the redshift of the BL Lacs. In this paper, we measure the redshift of BL Lacs usin
Externí odkaz:
https://doaj.org/article/7153b66b699c4db4b9c8d1f62aa9e009
Autor:
A. J. Levan, G. P. Lamb, B. Schneider, J. Hjorth, T. Zafar, A. de Ugarte Postigo, B. Sargent, S. E. Mullally, L. Izzo, P. D’Avanzo, E. Burns, J. F. Agüí Fernández, T. Barclay, M. G. Bernardini, K. Bhirombhakdi, M. Bremer, R. Brivio, S. Campana, A. A. Chrimes, V. D’Elia, M. Della Valle, M. De Pasquale, M. Ferro, W. Fong, A. S. Fruchter, J. P. U. Fynbo, N. Gaspari, B. P. Gompertz, D. H. Hartmann, C. L. Hedges, K. E. Heintz, K. Hotokezaka, P. Jakobsson, D. A. Kann, J. A. Kennea, T. Laskar, E. Le Floc’h, D. B. Malesani, A. Melandri, B. D. Metzger, S. R. Oates, E. Pian, S. Piranomonte, G. Pugliese, J. L. Racusin, J. C. Rastinejad, M. E. Ravasio, A. Rossi, A. Saccardi, R. Salvaterra, B. Sbarufatti, R. L. C. Starling, N. R. Tanvir, C. C. Thöne, A. J. van der Horst, S. D. Vergani, D. Watson, K. Wiersema, R. A. M. J. Wijers, Dong Xu
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 1, p L28 (2023)
We present James Webb Space Telescope (JWST) and Hubble Space Telescope (HST) observations of the afterglow of GRB 221009A, the brightest gamma-ray burst (GRB) ever observed. This includes the first mid-IR spectra of any GRB, obtained with JWST/Near
Externí odkaz:
https://doaj.org/article/e0b6ea15557a457382411275e35f81e1
Autor:
Mark N. Goltz, D. H. Hartman
Publikováno v:
Environmental Engineering and Policy. 3:1-7
Environmental managers at U.S. Department of Defense (DoD) installations overseas are faced with the challenge of managing contaminated sites at these installations with little information on the extent of contamination or the risk posed by the site.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4eefc7680d74f8d6a08213f26baa6237
https://doi.org/10.1007/s100220100035
https://doi.org/10.1007/s100220100035
Publikováno v:
Optical Society of America Annual Meeting.
Semiconductor lasers may play an important role in future photonic telecommunication switching networks. By mode-locking these semiconductor laser devices, compact and efficient sources become available for use in future photonic networks, ultrafast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ace0ca1ce2d4d31bb31c90076afc6ef
https://doi.org/10.1364/oam.1992.wu2
https://doi.org/10.1364/oam.1992.wu2
Publikováno v:
Il Nuovo Cimento A. 51:131-158
A measurement of the primary spectrum of the cosmic radiation in the energy range of 5·1011 eV to ∼5·1015 eV has been made, employing the detection of atmospheric Cerenkov-light pulses produced in extensive air showers. Through the use of an all
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::723e1dfc0c85b3afa8967bd4c8768348
https://doi.org/10.1007/bf02822329
https://doi.org/10.1007/bf02822329
Autor:
K.-I. Nishikawa, P. Hardee, B. Zhang, I. Duţan, M. Medvedev, E. J. Choi, K. W. Min, J. Niemiec, Y. Mizuno, A. Nordlund, J. T. Frederiksen, H. Sol, M. Pohl, D. H. Hartmann
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1535-1541 (2013)
We have investigated the generation of magnetic fields associated with velocity shear between an unmagnetized relativistic jet and an unmagnetized sheath plasma. We have examined the strong magnetic fields generated by kinetic shear (Kelvin–Helm
Externí odkaz:
https://doaj.org/article/b952273a9efe42488138d04979d3052b