Results 11 to 20 of about 2,045,808 (218)

Distribution of magnetically confined circumstellar matter in oblique rotators [PDF]

Astronomy and Astrophysics, 2004
We consider the mechanical equilibrium and stability of matter trapped in the magnetosphere of a rapidly rotating star. Assuming a dipolar magnetic field and arbitrary inclination of the magnetic axis with respect to the axis of rotation we find stable equilibrium positions a) in a (warped) disk roughly aligned with the magnetic equatorial plane and b)
Sami Solanki, V Holzwarth
exaly   +4 more sources

Circumstellar matter studied by spectrally-resolved interferometry [PDF]

, 2012
This paper describes some generalities about spectro-interferometry and the role it has played in the last decade for the better understanding of circumstellar matter. I provide a small history of the technique and its origins, and recall the basics of differential phase and its central role for the recent discoveries.
Millour, Florentin
core   +6 more sources

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 ...
exaly   +2 more sources

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core   +6 more sources

Unravelling the Asphericities in the Explosion and Multifaceted Circumstellar Matter of SN 2023ixf

The Astrophysical Journal
We present a detailed investigation of photometric, spectroscopic, and polarimetric observations of the Type II SN 2023ixf. Earlier studies have provided compelling evidence for a delayed shock breakout from a confined dense circumstellar matter (CSM ...
Avinash Singh, Rishabh Singh Teja, Takashi J. Moriya, Keiichi Maeda, Koji S Kawabata, Masaomi Tanaka, Ryo Imazawa, Tatsuya Nakaoka, Anjasha Gangopadhyay, Masayuki Yamanaka, Vishwajeet Swain, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Ramya M. Anche, Yasuo Sano, A. Raj, V. K. Agnihotri, Varun Bhalerao, D. Bisht, M. S. Bisht, K. Belwal, S. K. Chakrabarti, Mitsugu Fujii, Takahiro Nagayama, Katsura Matsumoto, Taisei Hamada, Miho Kawabata, Amit Kumar, Ravi Kumar, Brian K. Malkan, Paul Smith, Yuta Sakagami, Kenta Taguchi, Nozomu Tominaga, Arata Watanabe   +35 more
doaj   +3 more sources

High-resolution Spectroscopy of SN 2023ixf’s First Week: Engulfing the Asymmetric Circumstellar Material

The Astrophysical Journal, 2023
We present a series of high-resolution echelle spectra of SN 2023ixf in M101, obtained nightly during the first week or so after discovery using PEPSI on the Large Binocular Telescope.
Nathan Smith, Jeniveve Pearson, David J. Sand, Ilya Ilyin, K. Azalee Bostroem, Griffin Hosseinzadeh, Manisha Shrestha   +6 more
doaj   +1 more source

Problems of modelization of circumstellar matter out of equilibrium [PDF]

Symposium - International Astronomical Union, 1994
Circumstellar envelopes of young and evolved stars are responsible for many important phenomena concerning the exchange of matter, angular momentum, energy and maybe magnetic field between the core structure of stars and the interstellar medium. In particular, it is through them that matter enriched in heavy elements flows from evolved stars towards ...
J-P. J. Lafon, E. Huguet
openaire   +1 more source

Takeout and Delivery: Erasing the Dusty Signature of Late-stage Terrestrial Planet Formation

The Astrophysical Journal, 2023
The formation of planets like Earth is expected to conclude with a series of late-stage giant impacts that generate warm dusty debris, the most anticipated visible signpost of terrestrial planet formation in progress.
Joan R. Najita, Scott J. Kenyon
doaj   +1 more source

SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium. I. The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy

The Astrophysical Journal, 2023
We have performed intensive follow-up observations of a Type IIn/Ia-CSM supernova (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the results of our observations focusing on optical/near-infrared (NIR)
Kohki Uno, Keiichi Maeda, Takashi Nagao, Tatsuya Nakaoka, Kentaro Motohara, Akito Tajitsu, Masahiro Konishi, Shuhei Koyama, Hidenori Takahashi, Masaomi Tanaka, Hanindyo Kuncarayakti, Miho Kawabata, Masayuki Yamanaka, Kentaro Aoki, Keisuke Isogai, Kenta Taguchi, Mao Ogawa, Koji S. Kawabata, Yuzuru Yoshii, Takashi Miyata, Ryo Imazawa   +20 more
doaj   +1 more source

Circumstellar matter in Algols and Serpentids [PDF]

Space Science Reviews, 1989
A systematic search is reported for phenomena associated with circumstellar matter in interacting binary systems of the Algol and W Serpentis type. Ultraviolet emission lines have been detected by the author in 10 Algols and 6 Serpentids. No conspicuous difference exists between systems with disk accretion and those with direct stream impact.
openaire   +2 more sources