FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2040596038> ?p ?o ?g. }

• W2040596038 endingPage "730" @default.
• W2040596038 startingPage "730" @default.
• W2040596038 abstract "view Abstract Citations (104) References (52) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS HST Observations of the Ring around SN 1987A Plait, Philip C. ; Lundqvist, Peter ; Chevalier, Roger A. ; Kirshner, Robert P. Abstract Hubble Space Telescope observations of SN 1987A show that the circumstellar material near the supernova forms a clumpy elliptical ring. We analyze six epochs of images made with the Faint Object Camera imaging the lines of [O III] and H尾 over the interval 1990 August-1993 October, and three epochs of observations with the Planetary Camera in the continuum and [N II] line over the interval 1992 April-1993 May. The elliptical ring in the [O III] images has a semimajor axis of 858 +/- 11 milliarcsec and a semiminor axis of 621 +/- 11 milliarcsec (6.4 x 10^17^ and 4.6 x 10^17^ +/- 8.1 x 10^15^ cm, respectively, for a distance of 50 kpc), which implies an inclination angle of 44^deg^ +/- 1^deg^, if the ring is a circle inclined to our line of sight. The apparent width of the ring in [O III] is 121 +/- 22 milliarcsec (9.0 x 10^16^ +/- 1.6 x 10^16^ cm) based on our deconvolved image, which represents an upper limit to the width of the ring. The position angle of the major axis on the sky is 89^deg^ +/- 3^deg^. One of the clumps on the ring is a superposed star, whose energy distribution is consistent with an A-type dwarf (V = 20.2 mag) in the Large Magellanic Cloud. The radial profile of the ring is not symmetric, with the inner boundary sharper than the outer. Based on the radial profiles and the flux interior to the ring, we concluded that the ring is indeed a tilted ring, and not a spheroidal shell. While the observed width of the ring is ~10^17^ cm, we find that the average path length through the emitting gas is ~4 x 10^15^ cm, so the filling factor is small. The ring has faded by a factor of ~3.7 in [O III] from 1990 August to 1993 October. The characteristic electron density from the [O III] 位5007 emission line averages 1.2 x 10^4^ cm^-3^, based on recombination models of the emission. Because the fading rate is uncorrelated with the surface brightness, the density appears to be independent of the brightness, which implies significant path length differences through the ring. By assuming the current structure observed in optical lines applies to the early structure in ultraviolet lines, we construct light curve models to compare with early IUE observations. The clumpy structure of the ring has relatively little effect on the light curves. The [O III] images show faint arclike nebulosity probably associated with the bipolar nebula around SN 1987A and projected inside the ring, which may have affected previous observations of the ring. Finally, we find that the fading rate provides evidence, though weak, favoring an expanding ring over a contracting one. Publication: The Astrophysical Journal Pub Date: February 1995 DOI: 10.1086/175213 Bibcode: 1995ApJ...439..730P Keywords: Image Analysis; Interstellar Matter; Stellar Envelopes; Supernova 1987a; Brightness; Faint Object Camera; H Beta Line; Hubble Space Telescope; Image Processing; Spectrum Analysis; Astronomy full text sources ADS | data products SIMBAD (9) NED (2) MAST (2) ESA (1)" @default.
• W2040596038 created "2016-06-24" @default.
• W2040596038 creator A5009552842 @default.
• W2040596038 creator A5018349920 @default.
• W2040596038 creator A5052552964 @default.
• W2040596038 creator A5085107775 @default.
• W2040596038 date "1995-02-01" @default.
• W2040596038 modified "2023-10-13" @default.
• W2040596038 title "HST observations of the ring around SN 1987A" @default.
• W2040596038 doi "https://doi.org/10.1086/175213" @default.
• W2040596038 hasPublicationYear "1995" @default.
• W2040596038 type Work @default.
• W2040596038 sameAs 2040596038 @default.
• W2040596038 citedByCount "87" @default.
• W2040596038 countsByYear W20405960382012 @default.
• W2040596038 countsByYear W20405960382013 @default.
• W2040596038 countsByYear W20405960382014 @default.
• W2040596038 countsByYear W20405960382015 @default.
• W2040596038 countsByYear W20405960382016 @default.
• W2040596038 countsByYear W20405960382017 @default.
• W2040596038 countsByYear W20405960382018 @default.
• W2040596038 countsByYear W20405960382019 @default.
• W2040596038 countsByYear W20405960382021 @default.
• W2040596038 countsByYear W20405960382022 @default.
• W2040596038 crossrefType "journal-article" @default.
• W2040596038 hasAuthorship W2040596038A5009552842 @default.
• W2040596038 hasAuthorship W2040596038A5018349920 @default.
• W2040596038 hasAuthorship W2040596038A5052552964 @default.
• W2040596038 hasAuthorship W2040596038A5085107775 @default.
• W2040596038 hasBestOaLocation W20405960381 @default.
• W2040596038 hasConcept C121332964 @default.
• W2040596038 hasConcept C127592171 @default.
• W2040596038 hasConcept C1276947 @default.
• W2040596038 hasConcept C150846664 @default.
• W2040596038 hasConcept C178790620 @default.
• W2040596038 hasConcept C185592680 @default.
• W2040596038 hasConcept C195475122 @default.
• W2040596038 hasConcept C2780378348 @default.
• W2040596038 hasConcept C2780928442 @default.
• W2040596038 hasConcept C44870925 @default.
• W2040596038 hasConcept C68271606 @default.
• W2040596038 hasConcept C98444146 @default.
• W2040596038 hasConceptScore W2040596038C121332964 @default.
• W2040596038 hasConceptScore W2040596038C127592171 @default.
• W2040596038 hasConceptScore W2040596038C1276947 @default.
• W2040596038 hasConceptScore W2040596038C150846664 @default.
• W2040596038 hasConceptScore W2040596038C178790620 @default.
• W2040596038 hasConceptScore W2040596038C185592680 @default.
• W2040596038 hasConceptScore W2040596038C195475122 @default.
• W2040596038 hasConceptScore W2040596038C2780378348 @default.
• W2040596038 hasConceptScore W2040596038C2780928442 @default.
• W2040596038 hasConceptScore W2040596038C44870925 @default.
• W2040596038 hasConceptScore W2040596038C68271606 @default.
• W2040596038 hasConceptScore W2040596038C98444146 @default.
• W2040596038 hasLocation W20405960381 @default.
• W2040596038 hasOpenAccess W2040596038 @default.
• W2040596038 hasPrimaryLocation W20405960381 @default.
• W2040596038 hasRelatedWork W1613387763 @default.
• W2040596038 hasRelatedWork W1655693475 @default.
• W2040596038 hasRelatedWork W1966666784 @default.
• W2040596038 hasRelatedWork W2017610738 @default.
• W2040596038 hasRelatedWork W2080342365 @default.
• W2040596038 hasRelatedWork W2952553241 @default.
• W2040596038 hasRelatedWork W3105595104 @default.
• W2040596038 hasRelatedWork W4239413067 @default.
• W2040596038 hasRelatedWork W4304143205 @default.
• W2040596038 hasRelatedWork W95707854 @default.
• W2040596038 hasVolume "439" @default.
• W2040596038 isParatext "false" @default.
• W2040596038 isRetracted "false" @default.
• W2040596038 magId "2040596038" @default.
• W2040596038 workType "article" @default.