1.6 GHz VLBI observations of SN 1979C: almost-free expansion

被引：12

作者：

Marcaide, J. M. ^{[1
]}

Marti-Vidal, I. ^{[1
,2
]}

Perez-Torres, M. A. ^{[3
]}

Alberdi, A. ^{[3
]}

Guirado, J. C. ^{[1
]}

Ros, E. ^{[1
,2
]}

Weiler, K. W. ^{[4
]}

机构：

[1] Univ Valencia, Dpt Astron & Astrofis, E-46100 Burjassot, Spain

[2] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[3] CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain

[4] USN, Res Lab, Washington, DC 20375 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2009年 / 503卷 / 03期

基金：

美国国家科学基金会;

关键词：

radio continuum: stars; supernovae: individual: SN 1979C; II SUPERNOVAE; EMISSION; SN1979C; RADIO;

D O I：

10.1051/0004-6361/200912485

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on 1.6GHz Very-Long-Baseline-Interferometry (VLBI) observations of supernova SN 1979C made on 18 November 2002. We derive a model-dependent supernova size. We also present a reanalysis of VLBI observations made by us on June 1999 and by other authors on February 2005. We conclude that, contrary to our earlier claim of strong deceleration in the expansion, SN1979C has been undergoing almost-free expansion (m = 0.91 +/- 0.09; R proportional to t(m)) for over 25 years.

引用

页码：869 / 872

页数：4

共 16 条

[1]

[Anonymous], 2000, The mathematica book

[2]

[Anonymous], 3348 IAU

[3] Shell revealed in SN1979C [J].

Bartel, N. ;

Bietenholz, M. F. .

ASTROPHYSICAL JOURNAL, 2008, 682 (02) :1065-1069

[4]

BARTEL N, 1991, SUPERNOVAE //, P503

[5] SN1979CVLBI: 22 years of almost free expansion [J].

Bartel, N ;

Bietenholz, MF .

ASTROPHYSICAL JOURNAL, 2003, 591 (01) :301-315

[6] HUBBLE CONSTANT DETERMINED USING VERY-LONG BASELINE INTERFEROMETRY OF A SUPERNOVA [J].

BARTEL, N ;

ROGERS, AEE ;

SHAPIRO, II ;

GORENSTEIN, MV ;

GWINN, CR ;

MARCAIDE, JM ;

WEILER, KW .

NATURE, 1985, 318 (6041) :25-30

[7] EMISSION FROM CIRCUMSTELLAR INTERACTION IN NORMAL TYPE-II SUPERNOVAE [J].

CHEVALIER, RA ;

FRANSSON, C .

ASTROPHYSICAL JOURNAL, 1994, 420 (01) :268-285

[8] THE RADIO AND X-RAY-EMISSION FROM TYPE-II SUPER-NOVAE [J].

CHEVALIER, RA .

ASTROPHYSICAL JOURNAL, 1982, 259 (01) :302-310

[9] The extragalactic distance scale key project .4. The discovery of Cepheids and a new distance to M100 using the Hubble space telescope [J].

Ferrarese, L ;

Freedman, WL ;

Hill, RJ ;

Saha, A ;

Madore, BF ;

Kennicutt, RC ;

Stetson, PB ;

Ford, HC ;

Graham, JA ;

Hoessel, JG ;

Han, MS ;

Huchra, J ;

Hughes, SM ;

Illingworth, GD ;

Kelson, D ;

Mould, JR ;

Phelps, R ;

Silbermann, NA ;

Sakai, S ;

Turner, A ;

Harding, P ;

Bresolin, F .

ASTROPHYSICAL JOURNAL, 1996, 464 (02) :568-&

[10]

GILL E, 1978, SIAM J NUMER ANAL, V15, P977

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