Oxford Index Search Results

You are looking at 41-55 of 55 items for:

Companions x Astronomical Instrumentation, Methods, and Techniques x clear all

Show only full text

Refine by type

Refine by product

 

Direct Imaging Search for Extrasolar Planets in the Pleiades

Kodai Yamamoto, Taro Matsuo, Hiroshi Shibai, Yoichi Itoh, Mihoko Konishi, Jun Sudo, Ryoko Tanii, Misato Fukagawa, Takahiro Sumi, Tomoyuki Kudo, Jun Hashimoto, Nobuhiko Kusakabe, Lyu Abe, Wolfgang Brandner, Brandt Timothy D., Joseph Carson, Thayne Currie, Egner Sebastian E., Markus Feldt, Miwa Goto, Carol Grady, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko Hayashi, Thomas Henning, Klaus Hodapp, Miki Ishii, Masanori Iye, Markus Janson, Ryo Kandori, Knapp Gillian R., Masayuki Kuzuhara, Jungmi Kwon, Mike McElwain, Shoken Miyama, Ichi Jun-Morino, Moro-Martin Amaya, June Nishikawa, Tetsuo Nishimura, Soo Tae-Pyo, Eugene Serabyn, Hiroshi Suto, Ryuji Suzuki, Michihiro Takami, Naruhisa Takato, Hiroshi Terada, Christian Thalmann, Daigo Tomono, Turner Edwin L., John Wisniewski, Makoto Watanabe, Toru Yamada, Hideki Takami, Tomonori Usuda and Motohide Tamura.

in Publications of the Astronomical Society of Japan

August 2013; p ublished online August 2013 .

Journal Article. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Stars. 8784 words.

We carried out an imaging survey for extrasolar planets around stars in the Pleiades (125 Myr, 135 pc) in the [math] and [math] bands using HiCIAO combined with adaptive optics, AO188, on...

Go to Oxford Journals »  full text

Antares

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 88 words.

The star Alpha Scorpii, an M1 supergiant over 10 000 times as luminous as the Sun and with a diameter about 400 times the Sun’s. It is a semiregular variable, ranging between magnitudes 0.9...

Go to Oxford Reference »  home page

Sirius

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 104 words.

The star Alpha Canis Majoris, magnitude −1.46, the brightest star in the sky. It is popularly known as the Dog Star because it lies in the constellation Canis Major, the Greater Dog. It is...

Go to Oxford Reference »  home page

Rasalgethi

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 101 words.

The star Alpha Herculis, an M5 supergiant or bright giant that is one of the largest stars known, with an estimated diameter some 400 times the Sun's. It is a semiregular variable that...

Go to Oxford Reference »  home page

recycled pulsar

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 121 words.

A pulsar of unusually low magnetic field (1–100 tesla) and low spin-down rate, frequently of very short pulse period, and often found in a binary system. Recycled pulsars are believed to be...

Go to Oxford Reference »  home page

Am star

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 91 words.

A star of spectral type A whose spectrum additionally contains very strong metallic lines (hence the suffix ‘m’) more typical of type F. Am stars are usually members of close binary...

Go to Oxford Reference »  home page

shell galaxy

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 91 words.

An elliptical galaxy surrounded by faint arcs or shells of stars, usually aligned at right angles to its major axis. One to twenty shells may be seen, nearly concentric but incomplete. They...

Go to Oxford Reference »  home page

Epsilon Aurigae

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 97 words.

An eclipsing binary with a very long orbital period (9892 days) and many unusual characteristics. A visible star, now thought to be an F0 giant, is eclipsed for approximately 610 days by a...

Go to Oxford Reference »  home page

Ep galaxy

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 104 words.

An elliptical galaxy showing some peculiarity in appearance, such as a dust patch with a few blue supergiant stars, filamentary gas with strong optical emission lines, or an...

Go to Oxford Reference »  home page

Andromeda Galaxy

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 144 words.

The spiral galaxy nearest to our own, and the largest member of the *Local Group; also called M31 and NGC 224. It lies 2.5 million l.y. away and is visible to the naked eye as an elongated...

Go to Oxford Reference »  home page

runaway star

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 130 words.

A young star moving at high velocity, perhaps hundreds of kilometres per second, suggesting that it has been ejected by some violent event from its birthplace. Such stars were probably once...

Go to Oxford Reference »  home page

SS433

Edited by Ian Ridpath.

in A Dictionary of Astronomy

P ublished online February 2018 .

Reference Entry. Subjects: Astronomy and Astrophysics; Astronomical Instrumentation, Methods, and Techniques; Galaxies. 155 words.

An X-ray binary about 15 000 l.y. away in the constellation Aquila, consisting of a hot supergiant with a compact companion, probably a black hole of about 16 solar masses. It lies in an...

Go to Oxford Reference »  home page

Spiral Structures and Shocks in Accretion Discs in Close Binary Systems: the Role of the Stellar Mass Ratio.

Giuseppe Lanzafame, Fabio Maravigna and Gaetano Belvedere.

in Publications of the Astronomical Society of Japan

June 2000; p ublished online June 2000 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Astronomical Instrumentation, Methods, and Techniques; Stars. 0 words.

In this work we investigated, in the Smooth Particle Hydrodynamics (SPH) framework, the development of spiral structures and shock fronts in the radial flow of accretion discs in close...

Go to Oxford Journals »  full text

Emission-Line Eclipse Mapping of Velocity Fields in a Dwarf-Nova Accretion Disk

Makoto Makita and Shin Mineshige.

in Publications of the Astronomical Society of Japan

June 2002; p ublished online June 2002 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Astronomical Instrumentation, Methods, and Techniques; Stars. 3778 words.

We propose a new method, emission-line eclipse mapping, to map the velocity fields of an accretion disk in position space. Quiescent dwarf novae usually exhibit double-peaked emission-line...

Go to Oxford Journals »  full text

Extreme asymmetry in the polarized disk of V1247 Orionis

Yurina Ohta, Misato Fukagawa, Michael L. Sitko, Takayuki Muto, Stefan Kraus, Carol A. Grady, John P. Wisniewski, Jeremy R. Swearingen, Hiroshi Shibai, Takahiro Sumi, Jun Hashimoto, Tomoyuki Kudo, Nobuhiko Kusakabe, Munetake Momose, Yoshiko Okamoto, Takayuki Kotani, Michihiro Takami, Thayne Currie, Christian Thalmann, Markus Janson, Eiji Akiyama, Katherine B. Follette, Satoshi Mayama, Lyu Abe, Wolfgang Brandner, Timothy D. Brandt, Joseph C. Carson, Sebastian E. Egner, Markus Feldt, Miwa Goto, Olivier Guyon, Yutaka Hayano, Masahiko Hayashi, Saeko S. Hayashi, Thomas Henning, Klaus W. Hodapp, Miki Ishii, Masanori Iye, Ryo Kandori, Gillian R. Knapp, Masayuki Kuzuhara, Jungmi Kwon, Taro Matsuo, Michael W. McElwain, Shoken Miyama, Jun-Ichi Morino, Amaya Moro-Martín, Tetsuo Nishimura, Tae-Soo Pyo, Eugene Serabyn, Takuya Suenaga, Hiroshi Suto, Ryuji Suzuki, Yasuhiro H. Takahashi, Hideki Takami, Naruhisa Takato, Hiroshi Terada, Daigo Tomono, Edwin L. Turner, Tomonori Usuda, Makoto Watanabe, Toru Yamada and Motohide Tamura.

in Publications of the Astronomical Society of Japan

August 2016; p ublished online May 2016 .

Journal Article. Subjects: Stars; Planetary Systems; Astronomical Instrumentation, Methods, and Techniques. 7289 words.

We present the first near-infrared scattered-light detection of the transitional disk around V1247 Ori, which was obtained using high-resolution polarimetric differential imaging...

Go to Oxford Journals »  full text: open access