Results 61 to 70 of about 17,929 (222)

Evolutionary Aspects of Circumstellar Matter in Binary Systems [PDF]

Symposium - International Astronomical Union, 1973
Several groups of close binary stars are considered in an attempt to explain their present state as a consequence of a large-scale mass transfer or mass loss in the past: Algol-like semidetached binaries, some shell stars (AX Mon), some binary X-ray sources (Cen X-3, Her X-1), the recurrent nova T CrB, helium-rich binaries v Sgr and KS Per, and the ...
openaire   +1 more source

Constraints on gamma-ray burst and supernova progenitors through circumstellar absorption lines. (II): Post-LBV Wolf-Rayet stars

, 2007
Van Marle et al. (2005) showed that circumstellar absorption lines in early Type Ib/c supernova and gamma-ray burst afterglow spectra may reveal the progenitor evolution of the exploding Wolf-Rayet star. While the quoted paper deals with Wolf-Rayet stars
A. J. van Marle, Bowen, Doggett, Dopita, Eldridge, Fassia, Fiore, Franco, Freyer, G. García-Segura, Garc'ia-Segura, Garc'ia-Segura, Garc'ia-Segura, Iwamoto, Langer, Langer, Lazzati, Mazzali, Meynet, Meynet, Miller, N. Langer, Nakamura, Petrovic, Prochaska, Schaefer, Schaller, Starling, Stone, van Marle, van Marle, van Marle, van Marle, van Marle, Weaver, Woosley   +35 more
core   +1 more source

Observations of Circumstellar Matter in Close Binary Systems [PDF]

Publications of the Astronomical Society of the Pacific, 1970
Observational evidence for the existence of matter between the components of binary stars is summarized and discussed. Five kinds of evidence are considered: the presence of emission features in spectra; the distortion of velocity curves; spectrophotometry of variable absorption features in spectra; the distortion of light curves; changes of orbital ...
openaire   +1 more source

Detection of Pre-Shock Dense Circumstellar Material of SN 1978K [PDF]

, 1998
The supernova SN 1978K has been noted for its lack of emission lines broader than a few thousand km/s since its discovery in 1990. Modeling of the radio spectrum of the peculiar SN 1978K indicates the existence of HII absorption along the line of sight ...
Adeline Caulet, Cappellaro E., Chugai N. N., Esteban C., Hagen H.-J., Hutsemekers D., Kurt W. Weiler, Marcos J. Montes, Nino Panagia, Schuyler D. Van Dyk, You-Hua Chu, Zheng W.   +11 more
core   +3 more sources

Ion‐Scale Characteristics of the Martian Magnetic Pile‐Up Boundary Layer

Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.
Abstract The Martian magnetic pile‐up boundary (MPB) delineates the interface between the magnetosheath and the induced magnetosphere, but its global ion‐scale characteristics remaining unclear. Utilizing a three‐dimensional Hall magnetohydrodynamic (MHD) model, this study aims to reveal the features of the MPB layer, including magnetic field, current ...
Shibang Li, Siqi Wang, Haoyu Lu, Jinbin Cao, Xiaoshu Wu, Yasong Ge, James A. Wild, Chuanfei Dong, Nihan Chen, Yihui Song, Jianxuan Wang, Yuchen Cao, Jianing Zhao   +12 more
wiley   +1 more source

The Presolar Grain Database. I. Silicon Carbide

The Astrophysical Journal Supplement Series
The Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009.
Thomas Stephan, Reto Trappitsch, Peter Hoppe, Andrew M. Davis, Maitrayee Bose, Asmaa Boujibar, Frank Gyngard, K. Mairin Hynes, Nan Liu, Larry R. Nittler, Ryan C. Ogliore   +10 more
doaj   +1 more source

Afterglows of Mildly Relativistic Supernovae: Baryon Loaded Blastwaves

, 2011
Relativistic supernovae have been discovered until recently only through their association with long duration Gamma Ray Bursts (GRB). As the ejecta mass is negligible in comparison to the swept up mass, the blastwaves of such explosions are well ...
Chakraborti, Sayan, Ray, Alak
core   +1 more source

JWST Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of M4

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121) along its entire white dwarf (WD) cooling sequence (CS).
Luigi R. Bedin, Mattia Libralato, Maurizio Salaris, Domenico Nardiello, Michele Scalco, Massimo Griggio, Jay Anderson, Pierre Bergeron, Andrea Bellini, Roman Gerasimov, Adam J. Burgasser, Daniel Apai   +11 more
wiley   +1 more source

Evidence from infrared observations of circumstellar matter around chromospherically active binaries* [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
We analyse a sample of 12 RS CVn-type systems for which accurate photometry exists, extending from optical to near-infrared and even to IRAS bandpasses in some cases. We reconstruct the energy distribution expected from the binaries, taking into account the radii and spectral types of the components, and we compare them with the observed fluxes.
F. Scaltriti, BUSSO, Maurizio Maria, M. Ferrari Toniolo, L. Origlia, P. Persi, M. Robberto, G. Silvestro   +6 more
openaire   +2 more sources

The Dusty Aftermath of the V1309 Sco Binary Merger

, 2013
We present mid-IR photometry and spectra of the merged binary V1309 Sco taken between 18 and 23 months after outburst. Strong mid-IR emission and a solid state absorption feature indicate the presence of a significant amount of dust in the circumstellar ...
Kozłowski, S., Kubiak, M., Melis, C., Nicholls, C. P., Pietrukowicz, P., Pietrzyński, G., Poleski, R., Soszyński, I., Szymański, M. K., Udalski, A., Ulaczyk, K., Wyrzykowski, Ł.   +11 more
core   +1 more source