M. Matsuura
A STUBBORNLY LARGE MASS OF COLD DUST IN THE EJECTA OF SUPERNOVA 1987A
Matsuura, M.; Dwek, E.; Barlow, M. J.; Babler, B.; Baes, M.; Meixner, M.; Cernicharo, José; Clayton, Geoff C.; Dunne, L.; Fransson, C.; Fritz, Jacopo; Gear, Walter; Gomez, H. L.; Groenewegen, M. A. T.; Indebetouw, R.; Ivison, R. J.; Jerkstrand, A.; Lebouteiller, V.; Lim, T. L.; Lundqvist, P.; Pearson, C. P.; Roman-Duval, J.; Royer, P.; Staveley-Smith, Lister; Swinyard, B. M.; van Hoof, P. A. M.; van Loon, J. Th.; Verstappen, Joris; Wesson, Roger; Zanardo, Giovanna; Blommaert, Joris A. D. L.; Decin, Leen; Reach, W. T.; Sonneborn, George; Van de Steene, Griet C.; Yates, Jeremy A.
Authors
E. Dwek
M. J. Barlow
B. Babler
M. Baes
M. Meixner
José Cernicharo
Geoff C. Clayton
L. Dunne
C. Fransson
Jacopo Fritz
Walter Gear
H. L. Gomez
M. A. T. Groenewegen
R. Indebetouw
R. J. Ivison
A. Jerkstrand
V. Lebouteiller
T. L. Lim
P. Lundqvist
C. P. Pearson
J. Roman-Duval
P. Royer
Lister Staveley-Smith
B. M. Swinyard
P. A. M. van Hoof
Jacobus Van Loon j.t.van.loon@keele.ac.uk
Joris Verstappen
Roger Wesson
Giovanna Zanardo
Joris A. D. L. Blommaert
Leen Decin
W. T. Reach
George Sonneborn
Griet C. Van de Steene
Jeremy A. Yates
Abstract
We present new Herschel photometric and spectroscopic observations of Supernova 1987A, carried out in 2012. Our dedicated photometric measurements provide new 70 μm data and improved imaging quality at 100 and 160 μm compared to previous observations in 2010. Our Herschel spectra show only weak CO line emission, and provide an upper limit for the 63 μm [O i] line flux, eliminating the possibility that line contaminations distort the previously estimated dust mass. The far-infrared spectral energy distribution (SED) is well fitted by thermal emission from cold dust. The newly measured 70 μm flux constrains the dust temperature, limiting it to nearly a single temperature. The far-infrared emission can be fitted by 0.5 ± 0.1 M☉ of amorphous carbon, about a factor of two larger than the current nucleosynthetic mass prediction for carbon. The observation of SiO molecules at early and late phases suggests that silicates may also have formed and we could fit the SED with a combination of 0.3 M☉ of amorphous carbon and 0.5 M☉ of silicates, totalling 0.8 M☉ of dust. Our analysis thus supports the presence of a large dust reservoir in the ejecta of SN 1987A. The inferred dust mass suggests that supernovae can be an important source of dust in the interstellar medium, from local to high-redshift galaxies.
Journal Article Type | Article |
---|---|
Online Publication Date | Feb 9, 2015 |
Deposit Date | May 30, 2023 |
Journal | The Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 800 |
Issue | 1 |
Pages | 50 |
DOI | https://doi.org/10.1088/0004-637x/800/1/50 |
Keywords | Space and Planetary Science; Astronomy and Astrophysics |
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