HST/ACS imaging of a Balmer-dominated shock in Kepler’s supernova remnant

Sankrit, Ravi; Blair, William P.; DeLaney, Tracey; Rudnick, Lawrence; Harrus, I.; Ennis, J.

doi:10.1016/j.asr.2004.11.018

Cited by 38 publications

(66 citation statements)

References 10 publications

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“…Using these values we find D=5.1 0.7 0.8 -+ kpc, where the error intervals are based on the uncertainties quoted above for the shock velocity and the error on a single measurement of the proper motion, which is 0 002 yr −1 (see Section 4). Our newly derived distance to Kepler is significantly higher than our earlier estimate (Sankrit et al 2005), which was based on the proper motion measurement of the NW filament (near positions 7 and 8 of this study). The difference is primarily due to the higher proper motion, 0 09±0 02 yr −1 , used in the earlier study compared to the value used here.…”

Section: Distance To Kepler's Snrcontrasting

confidence: 45%

“…recent theoretical calculations of van Adelsberg et al (2008). We conclude that our new value for the distance is more reliable than that obtained by Sankrit et al (2005).…”

Section: Distance To Kepler's Snrmentioning

confidence: 59%

“…This study represents a significant improvement over that of Sankrit et al (2005)-in the current study 26 filament positions were accessible for measurement as compared with two in the earlier work, and the statistical errors on the measurements were reduced by an order of magnitude. We used the average proper motion for four filament positions and the shock velocity reported in the literature to obtain a distance of 5.1 kpc to Kepler, which is about 30% higher than the value obtained by Sankrit et al (2005).…”

Section: Discussionmentioning

confidence: 72%

“…kpc (Sankrit et al 2005). In recent years, distances of either 4 or 5 kpc have been assumed in almost all the published literature on Kepler.…”

Section: Introductionmentioning

confidence: 99%

“…Proper motions of Balmer filaments have been measured by Sankrit et al (2005), based on a comparison of a ground based image obtained in 1987 with one from the Hubble Space Telescope (HST) obtained in 2003. The low angular resolution of the ground based image and the crowded star field toward Kepler permitted us to measure the motion only at two locations near each other along a single filament in the northwest.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Second Epoch Hubble Space Telescope Observations of Kepler’s Supernova Remnant: The Proper Motions of Balmer Filaments*

Sankrit

Raymond

Blair

et al. 2016

ApJ

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We report on the proper motions of Balmer-dominated filaments in Kepler's supernova remnant using high resolution images obtained with the Hubble Space Telescope at two epochs separated by about 10 years. We use the improved proper motion measurements and revised values of shock velocities to derive a distance to Kepler of 5.1 0.7 0.8 -+ kpc. The main shock around the northern rim of the remnant has a typical speed of 1690 km s −1 and is encountering material with densities of about 8 cm −3 . We find evidence for the variation of shock properties over small spatial scales, including differences in the driving pressures as the shock wraps around a curved cloud surface. We find that the Balmer filaments ahead of the ejecta knot on the northwest boundary of the remnant are becoming fainter and more diffuse. We also find that the Balmer filaments associated with circumstellar material in the interior regions of the remnant are due to shocks with significantly lower velocities and that the brightness variations among these filaments trace the density distribution of the material, which may have a disk-like geometry.

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Section: Distance To Kepler's Snrcontrasting

confidence: 45%

“…recent theoretical calculations of van Adelsberg et al (2008). We conclude that our new value for the distance is more reliable than that obtained by Sankrit et al (2005).…”

Section: Distance To Kepler's Snrmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 72%

“…kpc (Sankrit et al 2005). In recent years, distances of either 4 or 5 kpc have been assumed in almost all the published literature on Kepler.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Second Epoch Hubble Space Telescope Observations of Kepler’s Supernova Remnant: The Proper Motions of Balmer Filaments*

Sankrit

Raymond

Blair

et al. 2016

ApJ

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Supernova 1604, Kepler’s Supernova, and Its Remnant

Vink

2016

Handbook of Supernovae

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Supernova 1604 is the last Galactic supernova for which historical records exist. Johannes Kepler's name is attached to it, as he published a detailed account of the observations made by himself and European colleagues. Supernova 1604 was very likely a Type Ia supernova, which exploded 350 pc to 750 pc above the Galactic plane. Its supernova remnant, known as Kepler's supernova remnant, shows clear evidence for interaction with nitrogen-rich material in the north/northwest part of the remnant, which, given the height above the Galactic plane, must find its origin in mass loss from the supernova progenitor system. The combination of a Type Ia supernova and the presence of circumstellar material makes Kepler's supernova remnant a unique object to study the origin of Type Ia supernovae. The evidence suggests that the progenitor binary system of supernova 1604 consisted of a carbon-oxygen white dwarf and an evolved companion star, which most likely was in the (post) asymptotic giant branch of its evolution. A problem with this scenario is that the companion star must have survived the explosion, but no trace of its existence has yet been found, despite a deep search.

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Supernova 1604, Kepler’s Supernova, and its Remnant

Vink¹

2017

Handbook of Supernovae

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HST/ACS imaging of a Balmer-dominated shock in Kepler’s supernova remnant

Cited by 38 publications

References 10 publications

Second Epoch Hubble Space Telescope Observations of Kepler’s Supernova Remnant: The Proper Motions of Balmer Filaments*

Second Epoch Hubble Space Telescope Observations of Kepler’s Supernova Remnant: The Proper Motions of Balmer Filaments*

Supernova 1604, Kepler’s Supernova, and Its Remnant

Supernova 1604, Kepler’s Supernova, and its Remnant

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