Narrow ultraviolet emission lines from SN 1987A - Evidence for CNO processing in the progenitor

Fransson, Claes; Cassatella, A.; Gilmozzi, R.; Kirshner, R.; Panagia, N.; Sonneborn, G.; Wamsteker, W.

doi:10.1086/167022

Cited by 161 publications

(101 citation statements)

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“…This peculiar composition, namely, the observed large nitrogen overabundance, is strikingly similar to what is seen in the ejecta of eruptive high-mass stars, such as the low-velocity remnants of SN1987A (Fransson et al 1989) and the so-called S Condensation of η Carinae (Gull 2008). It may result from the ashes of the CNO cycle that have been exposed at the star's surface as a consequence of core-envelope mixing episodes during the AGB phase of the present white dwarf.…”

Section: Spectroscopysupporting

confidence: 60%

Discovery of a Giant, Highly Collimated Jet From Sanduleak's Star in the Large Magellanic Cloud

Angeloni¹,

Mille²,

Bland-Hawthorn³

et al. 2011

ApJ

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Highly collimated gas ejections are among the most dramatic structures in the universe, observed to emerge from very different astrophysical systems-from active galactic nuclei down to young brown dwarf stars. Even with the huge span in spatial scales, there is convincing evidence that the physics at the origin of the phenomenon, namely, the acceleration and collimation mechanisms, is the same in all classes of jets. Here we report on the discovery of a giant, highly collimated jet from Sanduleak's star in the Large Magellanic Cloud (LMC). With a physical extent of 14 pc at the distance of the LMC, it represents the largest stellar jet ever discovered, and the first resolved stellar jet beyond the Milky Way. The kinematics and extreme chemical composition of the ejecta from Sanduleak's star bear strong resemblance with the low-velocity remnants of SN1987A and with the outer filaments of the most famous supernova progenitor candidate, η Carinae. Moreover, the precise knowledge of the jets distance implies that it will be possible to derive accurate estimates of most of its physical properties. Sanduleak's bipolar outflow will thus become a crucial test bed for future theoretical modeling of astrophysical jets.

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Section: Spectroscopysupporting

confidence: 60%

Discovery of a Giant, Highly Collimated Jet From Sanduleak's Star in the Large Magellanic Cloud

Angeloni¹,

Mille²,

Bland-Hawthorn³

et al. 2011

ApJ

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“…In modeling the LMC absorption, Z06 used the elemental abundance table of AG89, while H06 chose the table of W00 because the lower oxygen abundance fitted the K absorption edge in the EPIC data better. Fransson et al (1989) found N/O ¼ 1:6 AE 0:8, about 12 times higher 3 than the AG89 solar value, which they interpret as evidence of substantial CNO processing. Lundqvist & Fransson (1996) found N/O ¼ 1:1 AE 0:4, while Sonneborn et al (1997) found N/O ¼ 1:7 AE 0:5.…”

Section: Individual Abundances and Their Ratiosmentioning

confidence: 87%

Probing Elemental Abundances in SNR 1987A usingXMM‐Newton

Heng

Haberl

Aschenbach

et al. 2008

ApJ

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“…1, the very late times are, in fact, dominated by the emission from the circumstellar inner ring, which was ionized by the shock breakout [39]. Around 1500 days after the explosion the ring emission is stronger than that from the supernova ejecta itself.…”

Section: Core Collapse Supernovaementioning

confidence: 98%

Optical Light Curves of Supernovae

Leibundgut

Suntzeff

2003

Supernovae and Gamma-Ray Bursters

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Abstract. Photometry is the most easily acquired information about supernovae. The light curves constructed from regular imaging provide signatures not only for the energy input, the radiation escape, the local environment and the progenitor stars, but also for the intervening dust. They are the main tool for the use of supernovae as distance indicators through the determination of the luminosity.The light curve of SN1987A still is the richest and longest observed example for a core-collapse supernova. Despite the peculiar nature of this object, as explosion of a blue supergiant, it displayed all the characteristics of type II supernovae. The light curves of type Ib/c supernovae are more homogeneous, but still display the signatures of explosions in massive stars, among them early interaction with their circumstellar material.Wrinkles in the near-uniform appearance of thermonuclear (type Ia) supernovae have emerged during the past decade. Subtle differences have been observed especially at near infrared (NIR) wavelengths. Interestingly, the light curve shapes appear to correlate with a variety of other characteristics of these supernovae.The construction of bolometric light curves provides the most direct link to theoretical predictions and can yield sorely needed constraints for the models. First steps in this direction have been already made.

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Narrow ultraviolet emission lines from SN 1987A - Evidence for CNO processing in the progenitor

Cited by 161 publications

References 0 publications

Discovery of a Giant, Highly Collimated Jet From Sanduleak's Star in the Large Magellanic Cloud

Discovery of a Giant, Highly Collimated Jet From Sanduleak's Star in the Large Magellanic Cloud

Probing Elemental Abundances in SNR 1987A usingXMM‐Newton

Optical Light Curves of Supernovae

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