Publications
182 results found
Meikle W, Hernandez M, Fassia A, et al., 1998, Supernova 1998bu in NGC 3368, IAU Circular, 6905
P. Meikle, M. Hernandez, and A. Fassia, Imperial College, London, report: "A spectrum of SN 1998bu was obtained by J. Iglesias with the William Herschel Telescope of the Isaac Newton Group, La Palma, on May 12.9 UT. The ISIS spectrograph (range 315- 898 nm, resolution 0.8 nm) yields a spectrum of a type-Ia supernova a few days before maximum light. It is similar to the spectrum of SN 1990N at one week before B maximum (Leibundgut et al. 1991, Ap.J. 371, L23). The Si II absorption minimum is at 611.5 nm (host galaxy rest frame, adopting the heliocentric radial velocity +744.8 km/s for M96 given by Munari et al. on IAUC 6902).
Stathakis R, Cannon R, Callaghan M, et al., 1998, SN 1987A: the next bang., AAO Newsl., No. 84, p. 7 - 9
The collision between the expanding ejecta and the circumstellar media of supernova 1987A, that is expected to produce a second dramatic display, is discussed.
Bowers EJC, Meikle WPS, Geballe TR, et al., 1997, Infrared and optical spectroscopy of type Ia supernovae in the nebular phase, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 290, Pages: 663-679, ISSN: 0035-8711
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- Citations: 74
Kibble B, Miller S, Meikle W, 1997, Physics in Space, Publisher: Heinemann Educational Publishers, ISBN: 043568843X
Meikle WPS, Bowers EJC, Geballe TR, et al., 1997, Infrared and optical spectroscopy of Type Ia supernovae, Thermonuclear Supernovae, Vol: 486, Pages: 53-64, ISSN: 0258-2023
Meikle WPS, Cumming RJ, Geballe TR, et al., 1996, An early-time infrared and optical study of the type Ia supernovae SN 1994D and 1991T, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 281, Pages: 263-280, ISSN: 0035-8711
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- Citations: 89
Meikle W, Catchpole R, Lewis J, et al., 1994, Supernovae galore!, Spectrum, No. 4, p. 7 - 12
Clegg RES, Stevens IR, Meikle WPS, 1994, Circumstellar Media in Late Stages of Stellar Evolution, Publisher: Cambridge University Press, ISBN: 9780521465519
The papers contained in this volume arise from the 34th Herstmonceux conference, held in Cambridge, U.K., which addressed in particular the behavior of matter surrounding stars in the later stages of evolution. Highlights include the latest observational results that show how various types of stellar ejecta differ in shape, and a unified view of the physical processes involved; as well as the latest results on the media around Supernovae 1987a and 1993j. Other topics include late stages of evolution of low and high mass stars; physics of stellar winds; morphology of nebulae around stars; binary stars and bipolar nebulae; collimated flows and condensations; novae and supernovae revealing previous ejecta; and supernovae occurring in dense media. This timely volume will serve both as an excellent introduction for graduate students and a reference for researchers who want to keep abreast of developments in the field.
Cumming RJ, Lundqvist P, Meikle WPS, et al., 1994, Supernova 1994W in NGC 4041, IAU Circular, 6057
R. J. Cumming and P. Lundqvist, Stockholm Observatory; and W. P. S. Meikle, Imperial College, London, report: "A spectrogram (range 428-800 nm, resolution 0.12 nm) of SN 1994W was taken with the 4.2-m William Herschel Telescope (+ ISIS) at La Palma by M. Breare and M. Azzaro on Aug. 13.9 UT. The H-alpha profile shows the same features as described on IAUC 6046 and is unchanged since a high-resolution (0.03-nm) Isaac Newton Telescope spectrogram was taken by E. J. Zuiderwijk on July 31. In addition to the features reported on IAUC 6046, we identify broad (FWHM 2000 km/s) emission in He I at 447.1 and 706.5 nm, and narrow P-Cyg lines with absorption minima at about -500 km/s (relative to the velocity of H II emission from the galaxy near the supernova) in Mg II (448.1 nm), He I (587.6 and 667.8 nm), Si II (634.7 and 637.1 nm), and O I (777.3 nm). An additional broad (FWHM 1500 km/s) emission feature at 792 nm may be due to a blend of Mg II (789.6 and 787.7 nm). The constancy of the H I profiles and the presence of narrow P-Cyg absorption suggest that the supernova is exciting a massive, dense circumstellar shell, rather than a radiatively accelerated stellar wind. We expect the fastest supernova ejecta to reach this shell soon, causing the dramatic disappearance of the narrow absorptions as in SN 1984E (cf. IAUC 6048), broadening of the Balmer lines, and perhaps x-ray and radio emission. Continued observations at all wavelengths are encouraged."
Martin R, Lewis J, Cumming RJ, et al., 1994, Supernova data archive progress report., Spectrum, No. 2
Meikle W, Cumming RJ, Geballe TR, et al., 1994, Discovery of Helium in a Type Ia Supernova, he Analysis of Emission Lines. Poster papers from the Space Telescope Science Institute symposium in honor of the 70th birthdays of D.E. Osterbrock and M.J. Seaton, held 16-18 May, 1994 at the Space Telescope Science Institute, Baltimore, MD. Edited by Robert E. Williams and Mario Livio. Baltimore: STScI, 1994., p.43
Cumming RJ, Meikle WPS, Geballe TR, 1994, Supernova 1994D in NGC 4526, IAU Circular, 5953
R. J. Cumming, W. P. S. Meikle, and T. R. Geballe report: "Our claimed detection of CO absorption in SN 1994D (cf. IAUC 5951), based on preliminary data reduction by one of us (TRG), is incorrect. More careful reduction (by TRG) of the data demonstrates that the CO absorption is in the underlying galaxy. The same re-reduction reaffirms that the wide absorption feature centered at 1.052 microns is intrinsic to the supernova. In addition, weaker and resolved (but less broad) absorption is apparent at 2.04 microns; this feature is identified as He I 2.058 microns, and it provides strong support for interpretation of the 1.052-micron feature as highly blueshifted He I 1.083-micron absorption."
Cumming RJ, Meikle WPS, Geballe TR, et al., 1994, Supernova 1994D in NGC 4526, IAU Circular, 5951
R. J. Cumming, Royal Greenwich Observatory (RGO); W. P. S. Meikle, Imperial College; and T. R. Geballe, Joint Astronomy Center (JAC), report: "Near-infrared spectra (resolution 800-1200 km/s) of SN 1994D were obtained by J. V. Wall (RGO), C. R. Jenkins (RGO), Geballe, and D. M. Walther (JAC) with the U.K. Infrared Telescope (+ CGS4) on Mar. 12.52 (J, H, K bands) and 13.51 UT (K only). The J-band spectrum shows a wide absorption feature centered at 1.052 microns and extending blueward as far as 1.036 microns. If this is due to a P-Cyg profile of He I 1.083-microns, it implies ejecta velocities as high as 14 000 km/s. On Mar. 12.52, the K-band spectrum showed absorption features centred at 2.30, 2.33, 2.36, and 2.39 microns, all having a depth of 8-9 percent of the continuum. We identify these features with first-overtone CO absorption at the redshift of NGC 4526. The 2-0 band head at 2.300 microns is unresolved at a resolution of 850 km/s. The spectrum of Mar. 13.51 shows the 2-0 band at approximately the same strength and the band head still unresolved, but the other CO bands have weakened considerably. An optical spectrum taken using ISIS on the William Herschel Telescope on Mar. 10.14 by L. J. Smith (University College London), M. Pettini and D. L. King (RGO), and C. Martin (Isaac Newton Group) shows no evidence for narrow emission or absorption in H-alpha associated with the supernova. We judge that the origin of the CO features must be intrinsic to the supernova system. This is supported by the change in their visibility. The early appearance and narrowness of the features imply that the CO lay above the ejecta."
Lewis JR, Walton NA, Meikle WPS, et al., 1994, Optical observations of supernova 1993J from La Palma - I. Days 2 to 125, Monthly Notices of the Royal Astronomical Society, Vol: 266, Pages: L27-L39, ISSN: 0035-8711
Cumming RJ, Meikle WPS, Walton N, et al., 1994, Narrow lines from SN 1993J, Circumstellar Media in Late Stages of Stellar Evolution
Spyromilio J, Allen DA, Meikle WPS, et al., 1994, Infrared Spectroscopy of Supernovae, Infrared Astronomy with Arrays, The Next Generation, Editors: Ian S McLean, Publisher: Astrophysics and Space Science Library, Pages: Vol. 190, p.65-Vol. 190, p.65, ISBN: 0-7923-2778-0
CUMMING RJ, MEIKLE WPS, 1993, COLD BRIGHT MATTER NEAR SUPERNOVA 1987-A, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 262, Pages: 689-698, ISSN: 0035-8711
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- Citations: 9
Cumming RJ, Meikle WPS, 1993, Cold bright matter near supernova 1987A, Monthly Notices of the Royal Astronomical Society, Vol: 262, Pages: 689-698, ISSN: 0035-8711
CALDWELL JAR, MENZIES JW, BANFIELD RM, et al., 1993, SPECTROSCOPIC AND PHOTOMETRIC-OBSERVATIONS OF SUPERNOVA 1987A .7. DAYS 793 TO 1770, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 262, Pages: 313-324, ISSN: 0035-8711
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- Citations: 11
MEIKLE WPS, SPYROMILIO J, ALLEN DA, et al., 1993, SPECTROSCOPY OF SUPERNOVA 1987A AT 1-4-MU-M .2. DAYS 377 TO 1114, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 261, Pages: 535-572, ISSN: 0035-8711
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- Citations: 67
Cumming RJ, Meikle WPS, 1993, Cold Bright Matter Near Supernova 1987A, Massive Stars: Their Lives in the Interstellar Medium
Meikle W, Lewis J, Martin R, et al., 1993, Supernova 1993J, GEMINI Newsletter Royal Greenwich Obs., Vol. 40, p. 1 (1993)
Spyromilio J, Meikle WPS, Allen DA, et al., 1992, A large mass of iron in supernova 1991T, Monthly Notices of the Royal Astronomical Society, Vol: 258, Pages: 53P-56P, ISSN: 0035-8711
Meikle W, Allen DA, Spyromilio J, et al., 1991, Near-Infrared Spectroscopy of SN 1987A to Beyond Day 1000, Supernova 1987A and other supernovae
Varani G, Meikle WPS, Spyromilio J, et al., 1991, Near-Ir Spectroscopic Analysis of the Co/Fe Ratio in Supernova 1987A, Supernova 1987A and other supernovae
Meikle WPS, Cumming RJ, Spyromilio J, et al., 1991, High Resolution Spectroscopy of the Circumstellar Medium of SN 1987A, Supernova 1987A and other supernovae
Varani G, Meikle WPS, Spyromilio J, et al., 1991, Near-IR Spectroscopic Analysis of the Co/Fe Ratio in Supernova 1987A, Supernova 1987A and other supernovae
Spyromilio J, Allen DA, Meikle WPS, 1991, Asymmetry in the Wind from the Precursor to Supernova 1987A, Supernovae
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