Determination of the Pattern Speed of Barred Spiral Galaxies

被引：12

作者：

Hirota, Akihiko ^{[1
]}

Kuno, Nario ^{[2
,6
]}

Sato, N. ^{[3
]}

Nakanishi, Hiroyuki ^{[5
]}

Tosaki, Tomoka ^{[2
]}

Matsui, Hidenori ^{[4
]}

Habe, Asao ^{[4
]}

Sorai, Kazuo ^{[4
]}

机构：

[1] Univ Tokyo, Dept Astron, Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

[2] Natl Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, Minamimaki, Nagano 3841305, Japan

[3] Wakayama Univ, Student Ctr Independent Res Sci, Wakayama 6408510, Japan

[4] Hokkaido Univ, Grad Sch Sci, Div Phys, Kita Ku, Sapporo, Hokkaido 0600810, Japan

[5] Kagoshima Univ, Fac Sci, Kagoshima 8900068, Japan

[6] Grad Univ Adv Studies SOKENDAI, Tokyo 1818588, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2009年 / 61卷 / 03期

关键词：

galaxies: bar; galaxies: fundamental parameters; galaxies:; individual; (NGC; 2903; NGC; 3627; M; 83); galaxies: kinematics and dynamics; ISM: molecules; methods: numerical; TREMAINE-WEINBERG METHOD; MOLECULAR GAS; HYDRODYNAMICAL SIMULATIONS; DYNAMICAL INTERPRETATION; CO OBSERVATIONS; DARK-MATTER; BIMA SURVEY; KINEMATICS; BARS; M83;

D O I：

10.1093/pasj/61.3.441

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We evaluated the availability of a method proposed by Kuno et al. (2000, PASJ, 52, 775) for measuring the pattern speed of barred galaxies, and applied it to observational data. We made error estimations using a hydrodynamical galaxy model to test the validity of the method. Error estimations suggest that the method is able to determine the pattern speed within an error of 10%-20%. The method was applied to (CO)-C-12 (1-0) data of three late-type barred galaxies: NGC 2903, M 83, and NGC 3627. The derived pattern speed was 40 km s(-1) kpc(-1) for NGC 2903, 57 km s(-1) kpc(-1) for M 83, 39 km s(-1) kpc(-1) for NGC 3627, respectively. For the sake of a comparison with measurements in other galaxies, we used the distance-independent value R (equivalent to R-CR/R-bar), and found that bars in the three late-type spirals are "slow" (R > 1.4). Our results support recent claims that bars are not always "fast" (R <= 1.4), at least for late-type spiral galaxies.

引用

页码：441 / 450

页数：10

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