SwePub
Sök i LIBRIS databas

  Utökad sökning

onr:"swepub:oai:DiVA.org:su-30944"
 

Sökning: onr:"swepub:oai:DiVA.org:su-30944" > High-resolution obs...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003589naa a2200457 4500
001oai:DiVA.org:su-30944
003SwePub
008091101s2005 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-309442 URI
0247 a https://doi.org/10.1111/j.1365-2966.2005.09102.x2 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Pérez-Torres, M. A.4 aut
2451 0a High-resolution observations of SN 2001gd in NGC 5033
264 1b Oxford University Press (OUP),c 2005
338 a print2 rdacarrier
520 a We report on 8.4-GHz very-long-baseline interferometry (VLBI) observations of SN 2001gd in the spiral galaxy NGC 5033 made on 2002 June 26 (2002.48) and 2003 April 8 (2003.27). We used the interferometric visibility data to estimate angular diameter sizes for the supernova by model fitting. Our data nominally suggest a relatively strong deceleration for the expansion of SN 2001gd, but we cannot dismiss the possibility of a free supernova expansion. From our VLBI observations on 2003 April 8, we inferred a minimum total energy in relativistic particles and magnetic fields in the supernova shell of Emin= (0.3-14) × 1047 erg, and a corresponding equipartition average magnetic field of Bmin= 50-350 mG. We also present multiwavelength Very Large Array (VLA) measurements of SN 2001gd made at our second VLBI epoch at frequencies of 1.4, 4.9, 8.4, 15.0, 22.5 and 43.3 GHz. The VLA data are well fitted by an optically thin, synchrotron spectrum (α=-1.0 +/- 0.1; Sν~να), partially absorbed by thermal plasma. We obtain a supernova flux density of 1.02 +/- 0.05 mJy at the observing frequency of 8.4 GHz for the second epoch, which results in an isotropic radio luminosity of (6.0 +/- 0.3) × 1036 erg s-1 between 1.4 and 43.3 GHz, at an adopted distance of 13.1 Mpc. Finally, we report on an XMM-Newton X-ray detection of SN 2001gd on 2002 December 18. The supernova X-ray spectrum is consistent with optically thin emission from a soft component (associated with emission from the reverse shock) at a temperature of around 1 keV. The observed flux corresponds to an isotropic X-ray luminosity of LX= (1.4 +/- 0.4) × 1039 erg s-1 in the 0.3-5 keV band. We suggest that both radio and X-ray observations of SN 2001gd indicate that a circumstellar interaction similar to that displayed by SN 1993J in M 81 is taking place.
653 a supernovae: individual: SN2001gd
653 a galaxies: individual: NGC5033
653 a radio continuum: stars
653 a X-rays: individual SN 2001gd
653 a Astronomy
653 a astronomi
7001 a Alberdi, A.4 aut
7001 a Marcaide, J. M.4 aut
7001 a Guerrero, M. A.4 aut
7001 a Lundqvist, P.u Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)lundq
7001 a Shapiro, I. I.4 aut
7001 a Ros, E.4 aut
7001 a Lara, L.4 aut
7001 a Guirado, J. C.4 aut
7001 a Weiler, K. W.4 aut
7001 a Stockdale, C. J.4 aut
7102 a Stockholms universitetb Institutionen för astronomi4 org
7730 t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 360, s. 1055-1062q 360<1055-1062x 0035-8711x 1365-2966
8564 u https://academic.oup.com/mnras/article-pdf/360/3/1055/3182240/360-3-1055.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-30944
8564 8u https://doi.org/10.1111/j.1365-2966.2005.09102.x

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy