Search Results - "Smoker, J"

Debris discs with multiple absorption features in metallic lines: circumstellar or interstellar origin? by Iglesias, D, Bayo, A, Olofsson, J, Wahhaj, Z, Eiroa, C, Montesinos, B, Rebollido, I, Smoker, J, Sbordone, L, Schreiber, M R, Henning, Th

Get full text

A giant outburst two years before the core-collapse of a massive star by Botticella, M. T, Pastorello, A, Nielsen, T. B, Bufano, F, Stanishev, V, Elias-Rosa, N, Mattila, S, Patat, F, Navasardyan, H, Augusteijn, T, Nakano, S, Smartt, S. J, Harutyunyan, A, Cappellaro, E, Deng, J, Keenan, F. P, Cao, C, Turatto, M, Lorenzi, V, Smoker, J. V, Agnoletto, I, Yamaoka, H, Zampieri, L, Itagaki, K, Bonnet-Bidaud, J.-M, Eldridge, J. J, Valenti, S, Mazzali, P. A, Meng, X, Xu, D, Iijima, T, Boles, T, Benetti, S, Dennefeld, M, Young, D

“…The death of massive stars produces a variety of supernovae, which are linked to the structure of the exploding stars. The detection of several precursor stars…”
Get full text

A magnetic massive star has experienced a stellar merger by Frost, A J, Sana, H, Mahy, L, Wade, G, Barron, J, Le Bouquin, J-B, Mérand, A, Schneider, F R N, Shenar, T, Barbá, R H, Bowman, D M, Fabry, M, Farhang, A, Marchant, P, Morrell, N I, Smoker, J V

“…Massive stars (those ≥8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in…”
Get full text

Distance limits to intermediate- and high-velocity clouds by Smoker, J. V., Fox, A. J., Keenan, F. P.

“…We present optical spectra of 403 stars and quasi-stellar objects in order to obtain distance limits towards intermediate- and high-velocity clouds (IHVCs),…”
Get full text

Large- and small-scale structure of the intermediate- and high-velocity clouds towards the LMC and SMC by Smoker, J. V., Fox, A. J., Keenan, F. P.

“…We employ Ca ii K and Na i D interstellar absorption-line spectroscopy of early-type stars in the Large and Small Magellanic Clouds (LMC, SMC) to investigate…”
Get full text

A remarkable change of the spectrum of the magnetic Of?p star HD 148937 reveals evidence of an eccentric, high-mass binary by Wade, G A, Smoker, J V, Evans, C J, Howarth, I D, Barba, R, Cox, N L J, Morrell, N, Nazé, Y, Cami, J, Farhang, A, Walborn, N R, Arias, J, Gamen, R

“…We report new spectroscopic observations of the magnetic Of?p star HD 148937 obtained since 2015 that differ qualitatively from its extensive historical record…”
Get full text

Metallicity and Physical Conditions in the Magellanic Bridge by Lehner, N, Howk, J. C, Keenan, F. P, Smoker, J. V

“…We present a new analysis of the diffuse gas in the Magellanic Bridge (R.A. [image] 3 super(h)) based on HST STIS E140M and FUSE spectra of two early-type…”
Get full text

An episode of extremely low precipitable water vapour over Paranal observatory by Kerber, F., Querel, R. R., Rondanelli, R., Hanuschik, R., van den Ancker, M., Cuevas, O., Smette, A., Smoker, J., Rose, T., Czekala, H.

“…We report on an episode of extremely low precipitable water vapour (PWV) of approximately 0.1 mm with a duration of more than 12 h at European Southern…”
Get full text

Early-type stars observed in the ESO UVES Paranal Observatory Project - III. Sub-parsec and au-scale structure in the interstellar medium by Smoker, J. V., Bagnulo, S., Cabanac, R., Keenan, F. P., Fossati, L., Ledoux, C., Jehin, E., Melo, C.

“…UVES interstellar observations from the Paranal Observatory Project are presented for early-type stars located in the line of sight to the nearby open clusters…”
Get full text

Early-type stars observed in the ESO UVES Paranal Observatory Project – IV. Studies of CN, CH+ and CH in the interstellar medium by Smoker, J., Ledoux, C., Jehin, E., Keenan, F. P., Kennedy, M., Cabanac, R., Melo, C.

“…High spectral resolution (∼80 000) and signal-to-noise observations from the Ultraviolet and Visual Echelle Spectrograph Paranal Observatory Project (UVES-POP)…”
Get full text

Early-type stars observed in the ESO UVES Paranal Observatory Project - I. Interstellar Na i UV, Ti ii and Ca ii K observations by Hunter, I., Smoker, J. V., Keenan, F. P., Ledoux, C., Jehin, E., Cabanac, R., Melo, C., Bagnulo, S.

“…We present an analysis of interstellar Na i (λair= 3302.37 and 3302.98 Å), Ti ii(λair= 3383.76 Å) and Ca ii K (λair= 3933.66 Å) absorption features for 74…”
Get full text

Macroturbulent and rotational broadening in the spectra of B-type supergiants by Ryans, R. S. I., Dufton, P. L., Rolleston, W. R. J., Lennon, D. J., Keenan, F. P., Smoker, J. V., Lambert, D. L.

“…Abstract The absorption-line spectra of early B-type supergiants show significant broadening that implies that an additional broadening mechanism…”
Get full text

Iron abundances of B-type post-asymptotic giant branch stars in globular clusters: Barnard 29 in M 13 and ROA 5701 in ω Cen by Thompson, H. M. A., Keenan, F. P., Dufton, P. L., Ryans, R. S. I., Smoker, J. V., Lambert, D. L., Zijlstra, A. A.

“…High-resolution optical and ultraviolet (UV) spectra of two B-type post-asymptotic giant branch (post-AGB) stars in globular clusters, Barnard 29 in M 13 and…”
Get full text

Ca ii K interstellar observations towards early-type disc and halo stars, abundances and distances of intermediate- and high-velocity clouds by Smoker, J. V., Lynn, B. B., Christian, D. J., Keenan, F. P.

“…We present Ca-iiK (λair= 3933.661-Å) interstellar observations towards 20 early-type stars, to place lower distance limits to intermediate- and high-velocity…”
Get full text

Early-type stars in the Galactic halo from the Palomar–Green survey – III. Completion of a magnitude range limited sample by Lynn, B. B., Keenan, F. P., Dufton, P. L., Saffer, R. A., Rolleston, W. R. J., Smoker, J. V.

“…High-resolution (R≈ 40 000) echelle spectroscopic observations of 13 high-latitude early-type stars are presented. These stars comprise the final part of a…”
Get full text

Observations towards early-type stars in the ESO-POP Survey – II. Searches for intermediate- and high-velocity clouds by Smoker, J. V., Hunter, I., Kalberla, P. M. W., Keenan, F. P., Morras, R., Hanuschik, R., Thompson, H. M. A., Silva, D., Bajaja, E., Poppel, W. G. L., Arnal, M.

“…We present Ca ii K and Ti ii optical spectra of early-type stars taken mainly from the ultraviolet and visual echelle spectrograph (UVES) Paranal Observatory…”
Get full text

A non-LTE abundance analysis of the post-AGB star ROA 5701 by Thompson, H. M. A., Keenan, F. P., Dufton, P. L., Ryans, R. S. I., Smoker, J. V.

“…An analysis of high-resolution Anglo-Australian Telescope (AAT)/University College London Échelle Spectrograph (UCLÉS) optical spectra for the ultraviolet…”
Get full text

High-resolution spectroscopic observations of post-asymptotic giant branch candidates from the Edinburgh—Cape Survey by Lynn, B. B., Keenan, F. P., Dufton, P. L., Rolleston, W. R. J., Smoker, J. V., Ryans, R. S. I., Kilkenny, D., O'Donoghue, D., Hambly, N., McGillivray, H. T.

“…High spectral resolution (R∼ 40 000) and signal-to-noise optical spectra, obtained at the Very Large Telescope (VLT), are presented for three post—asymptotic…”
Get full text

High-resolution spectroscopic observations of B-type stars from the Edinburgh-Cape Survey - III. Completion of a magnitude range limited survey by Lynn, B. B., Keenan, F. P., Dufton, P. L., Kilkenny, D., Rolleston, W. R. J., Smoker, J. V., Ryans, R. S. I., Hambly, N., McGillivray, H. T., O'Donoghue, D.

“…ABSTRACT High spectral resolution (R∼ 40 000) and signal‐to‐noise ratio observations of five high Galactic latitude early‐type stars taken from the…”
Get full text

High-resolution Keck I spectroscopy of Galactic halo post-asymptotic giant branch stars by Mooney, C. J., Rolleston, W. R. J., Keenan, F. P., Dufton, P. L., Smoker, J. V., Ryans, R. S. I., Aller, L. H.

“…Absolute and differential abundance analyses have been performed from high-resolution, high signal-to-noise ratio optical (Keck I) spectra for three evolved…”
Get full text