Search Results - "Raassen, A J J"

Solar chemical composition in the hot gas of cool-core ellipticals, groups, and clusters of galaxies by Mernier, F, Werner, N, de Plaa, J, Kaastra, J S, Raassen, A J J, Gu, L, Mao, J, Urdampilleta, I, Simionescu, A

“…Abstract The hot intracluster medium (ICM) pervading galaxy clusters and groups is rich in metals, which were synthesized by billions of supernovae and have…”
Get full text

Mass-invariance of the iron enrichment in the hot haloes of massive ellipticals, groups, and clusters of galaxies by Mernier, F, de Plaa, J, Werner, N, Kaastra, J S, Raassen, A J J, Gu, L, Mao, J, Urdampilleta, I, Truong, N, Simionescu, A

“…ABSTRACT X-ray measurements find systematically lower Fe abundances in the X-ray emitting haloes pervading groups (kT ≲ 1.7 keV) than in clusters of galaxies…”
Get full text

Branching Fractions and Transition Probabilities for UV Transitions in the Spectrum of Cr ii by Ward, Jacob W., Li, Jacqueline J., Schwartz, Jared, Nave, Gillian, Raassen, Ton A. J. J., Uylings, Peter H. M.

“…Abstract We present transition probabilities for 268 spectral lines of singly ionized chromium (Cr ii ) in the wavelength region 208–414 nm. Branching…”
Get full text

First Light Measurements of Capella with the Low-Energy Transmission Grating Spectrometer aboard the Chandra X-Ray Observatory by Brinkman, A. C, Gunsing, C. J. T, Kaastra, J. S, van der Meer, R. L. J, Mewe, R, Paerels, F, Raassen, A. J. J, van Rooijen, J. J, Bräuninger, H, Burkert, W, Burwitz, V, Hartner, G, Predehl, P, Ness, J.-U, Schmitt, J. H. M. M, Drake, J. J, Johnson, O, Juda, M, Kashyap, V, Murray, S. S, Pease, D, Ratzlaff, P, Wargelin, B. J

“…We present the first X-ray spectrum obtained by the Low-Energy Transmission Grating Spectrometer (LETGS) aboard the Chandra X-Ray Observatory. The spectrum is…”
Get full text

The X-ray spectra of the flaring and quiescent states of YZ CMi observed by XMM–Newton by Raassen, A. J. J., Mitra-Kraev, U., Güdel, M.

“…We analyse the X-ray spectrum of the active late-type star YZ CMi (M4.5V); for quiescent as well as active stages, we derive emission measure (EM)…”
Get full text

A COMPREHENSIVE X-RAY ABSORPTION MODEL FOR ATOMIC OXYGEN by Gorczyca, T W, Bautista, M A, HASOGLU, M F, Garcia, J, GATUZZ, E, Kaastra, J S, Kallman, T R, Manson, S T, Mendoza, C, RAASSEN, A J J, de Vries, C P, ZATSARINNY, O

“…An analytical formula is developed to accurately represent the photoabsorption cross section of O I for all energies of interest in X-ray spectral modeling. In…”
Get full text

Spectra of Ni V and Fe V in the Vacuum Ultraviolet by Ward, J. W, Raassen, A. J. J, Kramida, A, Nave, G

“…This work presents 97 remeasured Fe V wavelengths (1200 \r{A} to 1600 \r{A}) and 123 remeasured Ni V wavelengths (1200 \r{A} to 1400 \r{A}) with uncertainties…”
Get full text

X-ray spectra of the Fe-L complex III: systematic uncertainties in the atomic data by Gu, Liyi, Shah, Chintan, Mao, Junjie, Raassen, A. J. J, de Plaa, Jelle, Pinto, Ciro, Akamatsu, Hiroki, Werner, Norbert, Simionescu, Aurora, Mernier, Francois, Sawada, Makoto, Mohanty, Pranav, Amaro, Pedro, Gu, Ming Feng, Porter, F. Scott, Lopez-Urrutia, Jose R. Crespo, Kaastra, Jelle S

“…A&A 664, A62 (2022) There has been a growing request from the X-ray astronomy community for a quantitative estimate of systematic uncertainties originating…”
Get full text

Magnesium and silicon in interstellar dust: an X-ray overview by Rogantini, D, Costantini, E, Zeegers, S. T, Mehdipour, M, Psaradaki, I, Raassen, A. J. J, de Vries, C. P, Waters, L. B. F. M

“…A&A 641, A149 (2020) The dense Galactic environment is a large reservoir of interstellar dust. Therefore, this region represents a perfect laboratory to study…”
Get full text

X-ray spectra of the Fe-L complex by Gu, Liyi, Raassen, A. J. J, Mao, Junjie, de Plaa, Jelle, Shah, Chintan, Pinto, Ciro, Werner, Norbert, Simionescu, Aurora, Mernier, Francois, Kaastra, Jelle S

“…A&A 627, A51 (2019) The Hitomi results on the Perseus cluster lead to improvements in our knowledge of atomic physics which are crucial for the precise…”
Get full text

Charge exchange in galaxy clusters by Gu, Liyi, Mao, Junjie, de Plaa, Jelle, Raassen, A. J. J, Shah, Chintan, Kaastra, Jelle S

“…A&A 611, A26 (2018) Though theoretically expected, the charge exchange emission from galaxy clusters has not yet been confidently detected. Accumulating hints…”
Get full text

X-ray spectra of the Fe-L complex II: atomic data constraints from EBIT experiment and X-ray grating observations of Capella by Gu, Liyi, Shah, Chintan, Mao, Junjie, Raassen, A. J. J, de Plaa, Jelle, Pinto, Ciro, Akamatsu, Hiroki, Werner, Norbert, Simionescu, Aurora, Mernier, François, Sawada, Makoto, Mohanty, Pranav, Amaro, Pedro, Gu, Ming Feng, Porter, F. Scott, López-Urrutia, José R. Crespo, Kaastra, Jelle S

“…A&A 641, A93 (2020) The Hitomi results for the Perseus cluster have shown that accurate atomic models are essential to the success of X-ray spectroscopic…”
Get full text

Plasma code for astrophysical charge exchange emission at X-ray wavelengths by Gu, Liyi, Kaastra, Jelle, Raassen, A. J. J

“…A&A 588, A52 (2016) Charge exchange X-ray emission provides unique insights into the interactions between cold and hot astrophysical plasmas. Besides its own…”
Get full text

Density diagnostics of ionized outflows in active galactic nuclei: X-ray and UV absorption lines from metastable levels in Be-like to C-like ions by Mao, Junjie, Kaastra, J. S, Mehdipour, M, Raassen, A. J. J, Gu, Liyi, Miller, J. M

“…A&A 607, A100 (2017) Ionized outflows in Active Galactic Nuclei (AGN) are thought to influence their nuclear and local galactic environment. However, the…”
Get full text

Line absorption of He-like triplet lines by Li-like ions. Caveats of using line ratios of triplets for plasma diagnostics by Mehdipour, M, Kaastra, J. S, Raassen, A. J. J

“…A&A 579, A87 (2015) He-like ions produce distinctive series of triplet lines under various astrophysical conditions. However, this emission can be affected by…”
Get full text

Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi by Aharonian, Hitomi Collaboration, Felix, Akamatsu, Hiroki, Akimoto, Fumie, Allen, Steven W, Angelini, Lorella, Audard, Marc, Awaki, Hisamitsu, Axelsson, Magnus, Bamba, Aya, Bautz, Marshall W, Blandford, Roger, Brenneman, Laura W, Brown, Gregory V, Bulbul, Esra, Cackett, Edward M, Chernyakova, Maria, Chiao, Meng P, Coppi, Paolo S, Costantini, Elisa, de Plaa, Jelle, de Vries, Cor P, den Herder, Jan-Willem, Done, Chris, Dotani, Tadayasu, Ebisawa, Ken, Eckart, Megan E, Enoto, Teruaki, Ezoe, Yuichiro, Fabian, Andrew C, Ferrigno, Carlo, Foster, Adam R, Fujimoto, Ryuichi, Fukazawa, Yasushi, Furuzawa, Akihiro, Galeazzi, Massimiliano, Gallo, Luigi C, Gandhi, Poshak, Giustini, Margherita, Goldwurm, Andrea, Gu, Liyi, Guainazzi, Matteo, Haba, Yoshito, Hagino, Kouichi, Hamaguchi, Kenji, Harrus, Ilana M, Hatsukade, Isamu, Hayashi, Katsuhiro, Hayashi, Takayuki, Hayashida, Kiyoshi, Hell, Natalie, Hiraga, Junko S, Hornschemeier, Ann, Hoshino, Akio, Hughes, John P, Ichinohe, Yuto, Iizuka, Ryo, Inoue, Hajime, Inoue, Yoshiyuki, Ishida, Manabu, Ishikawa, Kumi, Ishisaki, Yoshitaka, Iwai, Masachika, Kaastra, Jelle, Kallman, Tim, Kamae, Tsuneyoshi, Kataoka, Jun, Katsuda, Satoru, Kawai, Nobuyuki, Kelley, Richard L, Kilbourne, Caroline A, Kitaguchi, Takao, Kitamoto, Shunji, Kitayama, Tetsu, Kohmura, Takayoshi, Kokubun, Motohide, Koyama, Katsuji, Koyama, Shu, Kretschmar, Peter, Krimm, Hans A, Kubota, Aya, Kunieda, Hideyo, Laurent, Philippe, Lee, Shiu-Hang, Leutenegger, Maurice A, Limousin, Olivier, Loewenstein, Michael, Long, Knox S, Lumb, David, Madejski, Greg, Maeda, Yoshitomo, Maier, Daniel, Makishima, Kazuo, Markevitch, Maxim, Matsumoto, Hironori, Matsushita, Kyoko, McCammon, Dan, McNamara, Brian R, Mehdipour, Missagh, Miller, Eric D, Miller, Jon M

“…Abstract The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with ∼5 eV resolution in the 2–9 keV band, offers an unprecedented benchmark of…”
Get full text

Science with hot astrophysical plasmas by Kaastra, J. S, Gu, L, Mao, J, Mehdipour, M, Mernier, F, de Plaa, J, Raassen, A. J. J, Urdampilleta, I

“…We present some recent highlights and prospects for the study of hot astrophysical plasmas. Hot plasmas can be studied primarily through their X-ray emission…”
Get full text

The X-ray spectrum of delta Orionis observed by LETGS aboard Chandra by Raassen, A. J. J, Pollock, A. M. T

“…A&A, 550, 55 (2013) We analyze the high-resolution X-ray spectrum of the supergiant O-star delta Orionis (O9.5II) with line ratios of He-like ions and a…”
Get full text

A novel scenario for the possible X-ray line feature at ~3.5 keV: Charge exchange with bare sulfur ions by Gu, L, Kaastra, J, Raassen, A. J. J, Mullen, P. D, Cumbee, R. S, Lyons, D, Stancil, P. C

“…Motivated by recent claims of a compelling ~3.5 keV emission line from nearby galaxies and galaxy clusters, we investigate a novel plasma model incorporating a…”
Get full text

Calibration and in orbit performance of the reflection grating spectrometer onboard XMM-Newton by de Vries, C. P, Herder, J. W. den, Gabriel, C, Gonzalez-Riestra, R, Ibarra, A, Kaastra, J. S, Pollock, A. M. T, Raassen, A. J. J, Paerels, F. B. S

“…A&A 573, A128 (2015) Context: XMM-Newton was launched on 10 December 1999 and has been operational since early 2000. One of the instruments onboard XMM-Newton…”
Get full text