Results 31 to 40 of about 14,620 (167)

Properties of X-ray Flares on Young Stars [PDF]

International Astronomical Union Colloquium, 1995
AbstractThe interest in the giant flares found on young stars results from the fact that their energetics is vastly different from solar flares. The recent ROSAT observations of young clusters yield a good basis for a systematic study of these flares.We have investigated 18 very deep pointed observations of star forming regions in IC348, Chamaeleon, ρ ...
Th. Preibisch, R. Neuhäuser
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X-ray properties of early-type stars [PDF]

Symposium - International Astronomical Union, 1994
Extensive stellar surveys with the Einstein Observatory (Chlebowski et al., 1989) and with ROSAT have clearly confirmed the presence of stellar X-ray emission over nearly the whole range of the HR diagram. In the ROSAT all-sky survey data approximately 20000 stellar X-ray sources were detected (Schmitt et al., 1992).
Thomas W. Berghöfer, Jürgen H. M. M. Schmitt   +1 more
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X-RAY STAR CLUSTERS IN THE CARINA COMPLEX [PDF]

The Astrophysical Journal Supplement Series, 2011
ABSTRACT The distribution of young stars found in the Chandra Carina Complex Project (CCCP) is examined for clustering structure. X-ray surveys are advantageous for identifying young stellar populations compared to optical and infrared surveys in suffering less contamination ...
Feigelson, Eric D., Getman, Konstantin V., Townsley, Leisa K., Broos, Patrick S., Povich, Matthew S., Garmire, Gordon P., King, Robert R., Montmerle, Thierry, Preibisch, Thomas, Smith, Nathan, Stassun, Keivan G., Wang, Junfeng, Wolk, Scott, Zinnecker, Hans   +13 more
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Bringing the Norma Dark Cloud to Light in X-Rays

The Astronomical Journal
The filamentary dark cloud complex in Norma reveals signs of active low-mass star formation including protostars, H α emission line stars, Herbig–Haro objects, and the eruptive FU Orionis-like star V346 Nor.
Stephen L. Skinner, Manuel Güdel, Luisa M. Rebull   +2 more
doaj   +1 more source

Flares in late-type stars: X-ray [PDF]

International Astronomical Union Colloquium, 1995
Flare-like brightenings, similar to those observed on the Sun but on a larger energy scale, are observed in a variety of late-type stars, including classical M dwarf flare stars, RS CVn-type binaries and pre-main sequence (PMS) objects. These events, which are observable over the whole electromagnetic spectrum, are interpreted as due to rapid release ...
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The Sun as an X‐Ray Star. III. Flares [PDF]

The Astrophysical Journal, 2001
32 pages, 8 figures, 3 ...
Reale, F., Peres, G., Orlando, S.
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Thermonuclear Superburst of MAXI J1752−457 Observed with NinjaSat and MAXI

The Astrophysical Journal Letters
An uncatalogued bright X-ray transient was detected with MAXI on 2024 November 9, named MAXI J1752−457. The NinjaSat X-ray observatory promptly observed the source from November 10 to 18, while the small angular separation from the Sun hampered follow-up
Amira Aoyama, Teruaki Enoto, Takuya Takahashi, Sota Watanabe, Tomoshi Takeda, Wataru Iwakiri, Kaede Yamasaki, Satoko Iwata, Naoyuki Ota, Arata Jujo, Toru Tamagawa, Tatehiro Mihara, Chin-Ping Hu, Akira Dohi, Nobuya Nishimura, Motoko Serino, Motoki Nakajima, Takao Kitaguchi, Yo Kato, Nobuyuki Kawai, (NinjaSat collaboration)   +20 more
doaj   +1 more source

Constraints on Neutron Star Structure from the Clocked X-Ray Burster 1RXS J180408.9−342058

The Astrophysical Journal, 2023
Type I X-ray bursts are rapid-brightening transient phenomena on the surfaces of accreting neutron stars (NSs). Some X-ray bursts, called clocked bursters, exhibit regular behavior with similar light-curve profiles in their burst sequences.
A. Dohi, W. B. Iwakiri, N. Nishimura, T. Noda, S. Nagataki, M. Hashimoto   +5 more
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Ultraluminous X-ray sources and star formation [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
Chandra observations of the Cartwheel galaxy reveal a population of ultraluminous X-ray sources (ULXs) with lifetimes < 10^7 yr associated with a spreading wave of star formation which began some 3 x 10^8 yr ago. A population of high-mass X-ray binaries provides a simple model: donor stars of initial masses M_2 > 15 Msun transfer mass on their ...
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X-ray insights into star and planet formation [PDF]

Proceedings of the National Academy of Sciences, 2010
Although stars and planets form in cold environments, X-rays are produced in abundance by young stars. This review examines the implications of stellar X-rays for star and planet formation studies, highlighting the contributions of NASA’s (National Aeronautics and Space Administration) Chandra X-ray Observatory.
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