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SOFIA mid-infrared observations of Supernova 1987A in 2016 --- forward shocks and possible dust re-formation in the post-shocked region?
Mikako Matsuura, James M. De Buizer, Richard G. Arendt +10
The equatorial ring of Supernova (SN) 1987A has been exposed to forward shocks from the SN blast wave, and it has been suggested that these forward shocks have been causing on-goin…
ALMA spectral survey of Supernova 1987A --- molecular inventory, chemistry, dynamics and explosive nucleosynthesis
M. Matsuura, R. Indebetouw, S. Woosley +26
We report the first molecular line survey of Supernova 1987A in the millimetre wavelength range. In the ALMA 210--300 and 340--360 GHz spectra, we detected cold (20--170 K) CO, 28S…
Herschel imaging of the dust in the Helix Nebula (NGC 7293)
G. C. Van de Steene, P. A. M. van Hoof, K. M. Exter +19
In our series of papers presenting the Herschel imaging of evolved planetary nebulae, we present images of the dust distribution in the Helix nebula (NGC 7293). Images at 70, 160,…
A Herschel study of NGC 650
P. A. M. van Hoof, G. C. Van de Steene, K. M. Exter +15
As part of the Herschel Guaranteed Time Key Project MESS (Mass loss of Evolved StarS) we have imaged a sample of planetary nebulae. In this paper we present the PACS and SPIRE imag…
The enigmatic nature of the circumstellar envelope and bow shock surrounding Betelgeuse as revealed by Herschel. I. Evidence of clumps, multiple arcs, and a linear bar-like structure
L. Decin, N. L. J. Cox, P. Royer +13
Context. The interaction between stellar winds and the interstellar medium (ISM) can create complex bow shocks. The photometers on board the Herschel Space Observatory are ideally…
Nucleosynthetic Layers in the Shocked Ejecta of Cassiopeia A
Karl Isensee, Greg Olmschenk, Lawrence Rudnick +6
We present a 3-dimensional analysis of the supernova remnant Cassiopeia A using high resolution spectra from the Spitzer Space Telescope. We observe supernova ejecta both immediate…
An independent distance estimate to CW Leo
M. A. T. Groenewegen, M. J. Barlow, J. A. D. L. Blommaert +13
CW Leo has been observed six times between October 2009 and June 2012 with the SPIRE instrument on board the Herschel satellite. Variability has been detected in the flux emitted b…
The Circumstellar Environment of R Coronae Borealis: White Dwarf Merger or Final Helium Shell Flash?
Geoffrey C. Clayton, Ben E. K. Sugerman, S. Adam Stanford +21
In 2007, R Coronae Borealis (R CrB) went into an historically deep and long decline. In this state, the dust acts like a natural coronagraph at visible wavelengths, allowing faint…
Warm water vapour in the sooty outflow from a luminous carbon star
L. Decin, M. Agundez, M. J. Barlow +34
In 2001, the discovery of circumstellar water vapour around the ageing carbon star IRC+10216 was announced. This detection challenged the current understanding of chemistry in old…
MESS (Mass-loss of Evolved StarS), a Herschel Key Program
M. A. T. Groenewegen, C. Waelkens, M. J. Barlow +39
MESS (Mass-loss of Evolved StarS) is a Guaranteed Time Key Program that uses the PACS and SPIRE instruments on board the Herschel Space Observatory to observe a representative samp…
Imaging Planetary Nebulae with Herschel-PACS and SPIRE
P. A. M. van Hoof, K. M. Exter, G. C. Van de Steene +25
In this paper we will discuss the images of Planetary Nebulae that have recently been obtained with PACS and SPIRE on board the Herschel satellite. This comprises results for NGC 6…
Carbon Monoxide in the Cassiopeia A Supernova Remnant
J. Rho, T. H. Jarrett, W. T. Reach +2
We report the likely detection of near-infrared 2.29 m first overtone Carbon Monoxide (CO) emission from the young supernova remnant Cassiopeia A (Cas A). The continuum-subtract…
Dust Formation Observed in Young Supernova Remnants with Spitzer
J. Rho, W. T. Reach, A. Tappe +8
We present dust features and masses observed in young supernova remnants (SNRs) with Spitzer IRS mapping and staring observations of four youngest supernova remnants: SNR 1E102.2-7…