Oxford Index Browse

You are looking at 1-10 of 865 items for:

Astrometry and Celestial Mechanics x clear all

Ab Initio Calculations for Detectable New Isomers of Interstellar Carbon-Chain Radicals C<sub>n</sub>(<i>n</i>=2–8)

Junko Takahashi.

in Publications of the Astronomical Society of Japan

June 2000; p ublished online June 2000 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Interstellar Medium. 0 words.

Detectable new isomers of interstellar carbon-chain (linear) radicals, Cn(n=2–8), were investigated theoretically based on ab initio quantum chemical calculations. The molecular...

Go to Oxford Journals »  home page

Absolute Proper Motions of H<sub>2</sub>O Masers Away from the Galactic Plane Measured with VERA in the “Superbubble” Region NGC 281

Mayumi Sato, Tomoya Hirota, Mareki Honma, Hideyuki Kobayashi, Tetsuo Sasao, Takeshi Bushimata, Yoon Kyung Choi, Hiroshi Imai, Kenzaburo Iwadate, Takaaki Jike, Seiji Kameno, Osamu Kameya, Ryuichi Kamohara, Yukitoshi Kan-ya, Noriyuki Kawaguchi, Masachika Kijima, Mi Kyoung Kim, Seisuke Kuji, Tomoharu Kurayama, Seiji Manabe, Kenta Maruyama, Makoto Matsui, Naoko Matsumoto, Takeshi Miyaji, Takumi Nagayama, Akiharu Nakagawa, Kayoko Nakamura, Chung Sik Oh, Toshihiro Omodaka, Tomoaki Oyama, Satoshi Sakai, Katsuhisa Sato, Katsunori M. Shibata, Motonobu Shintani, Yoshiaki Tamura, Miyuki Tsushima and Kazuyoshi Yamashita.

in Publications of the Astronomical Society of Japan

August 2007; p ublished online August 2007 .

Journal Article. Subjects: Galaxies; Astrometry and Celestial Mechanics; Interstellar Medium. 6774 words.

We report on absolute proper-motion measurements of an H2O maser source in the NGC 281 West molecular cloud, which is located [math] 320 pc above the Galactic plane and is associated with...

Go to Oxford Journals »  home page

Accelerating a water maser face-on jet from a high mass young stellar object

Kazuhito Motogi, Kazuo Sorai, Mareki Honma, Tomoya Hirota, Kazuya Hachisuka, Kotaro Niinuma, Koichiro Sugiyama, Yoshinori Yonekura and Kenta Fujisawa.

in Publications of the Astronomical Society of Japan

October 2016; p ublished online February 2015 .

Journal Article. Subjects: Interstellar Medium; Astrometry and Celestial Mechanics; Stars. 7969 words.

We report on long-term single-dish and VLBI monitoring for intermittent flare activities of a dominant blue-shifted H2O maser associated with a southern high mass young stellar object,...

Go to Oxford Journals »  home page

Accretion Corona Immersed in Disk Radiation Fields

Tadahiro Miwa, Jun Fukue, Yoichi Watanabe and Mako Katayama.

in Publications of the Astronomical Society of Japan

June 1998; p ublished online June 1998 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Galaxies. 0 words.

We theoretically examined an accretion-disk corona, which is infalling toward the central black hole. The corona was supposed to be initially at rest far from the center. It was also...

Go to Oxford Journals »  home page

Accretion Disks Phase Transitions: 2-D or Not 2-D?

Marek A. Abramowicz, Gunnlaugur Björnsson and Igor V. Igumenshchev.

in Publications of the Astronomical Society of Japan

April 2000; p ublished online April 2000 .

Journal Article. Subjects: Astrometry and Celestial Mechanics. 0 words.

We argue that the proper way to treat thin-thick accretion-disk transitions should take into account the 2-D nature of the problem. We illustrate the physical inconsistency of the 1-D...

Go to Oxford Journals »  home page

Accretion Disks with a Cloudy Sky — Photon Floater

Jun Fukue.

in Publications of the Astronomical Society of Japan

February 1996; p ublished online February 1996 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Galaxies; Planetary Systems. 0 words.

Materials rotating above/below an accretion disk around a central object suffer from the influence of the strong radiation fields of the disk as well as the gravity of the central object....

Go to Oxford Journals »  home page

Accretion Geometry of the Low-Mass X-Ray Binary Aquila X-1 in the Soft and Hard States

Soki Sakurai, Shin'Ya Yamada, Shunsuke Torii, Hirofumi Noda, Kazuhiro Nakazawa, Kazuo Makishima and Hiromitsu Takahashi.

in Publications of the Astronomical Society of Japan

August 2012; p ublished online August 2012 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Stars. 8060 words.

The neutron-star Low-Mass X-ray Binary Aquila X-1 was observed seven times in total with the Suzaku X-ray observatory from September 28 to October 30 in 2007, in the decaying phase of an...

Go to Oxford Journals »  home page

Accretion in Gravitationally Contracting Clouds

Kohji Tomisaka.

in Publications of the Astronomical Society of Japan

October 1996; p ublished online October 1996 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Stars. 0 words.

Accretion flow in a contracting magnetized isothermal cloud was studied using magnetohydrodynamical simulations and a nested grid technique. First, the interstellar magnetized cloud...

Go to Oxford Journals »  home page

Accretion Rates and the Accretion Efficiency in AGNs

Wei-Hao Bian and Yong-Heng Zhao.

in Publications of the Astronomical Society of Japan

June 2003; p ublished online June 2003 .

Journal Article. Subjects: Astrometry and Celestial Mechanics; Galaxies. 3521 words.

We used the standard geometrical-thin accretion theory to obtain the accretion rates in Seyfert 1 galaxies and quasars. Combining the accretion rates with the bolometric luminosity, we...

Go to Oxford Journals »  home page

Accretion-Disk Corona Advected by External Radiation Drag I.

Yoichi Watanabe and Jun Fukue.

in Publications of the Astronomical Society of Japan

December 1996; p ublished online December 1996 .

Journal Article. Subjects: Astrometry and Celestial Mechanics. 0 words.

We examined an accretion-disk corona (β-corona) which is dynamically driven via the radiation drag exerted by a central luminous source and the accretion disk, itself. We adopted the...

Go to Oxford Journals »  home page