Zobrazeno 1 - 10
of 453
pro vyhledávání: '"Nicholls, C. P."'
Autor:
Gray, T. J., Stuchbery, A. E., Dobaczewski, J., Blazhev, A., Alshammari, H. A., Bignell, L. J., Bonnard, J., Coombes, B. J., Dowie, J. T. H., Gerathy, M. S. M., Kibédi, T., Lane, G. J., McCormick, B. P., Mitchell, A. J., Nicholls, C., Pope, J. G., Reinhard, P. -G., Spinks, N. J., Zhong, Y.
The $g$ factors of $11/2^-$ isomers in semimagic $^{109}$Sn and $^{111}$Sn (isomeric lifetimes $\tau = 2.9(3)$ ns and $\tau = 14.4(7)$ ns, respectively) were measured by an extension of the Time Differential Perturbed Angular Distribution technique,
Externí odkaz:
http://arxiv.org/abs/2310.11980
Publikováno v:
ApJ,835,209 (2017)
In this paper, we collect a sample of 81 ellipsoidal red giant binaries in the Large Magellanic Cloud (LMC), and we study their orbital natures individually and statistically. The sample contains 59 systems with circular orbits and 22 systems with ec
Externí odkaz:
http://arxiv.org/abs/1702.02376
Autor:
Nicholls, C. P., Lebzelter, T., Smette, A., Wolff, B., Hartman, H., Käufl, H. -U., Przybilla, N., Ramsay, S., Uttenthaler, S., Wahlgren, G. M., Bagnulo, S., Hussain, G. A. J., Nieva, M. -F., Seeman, U., Seifahrt, A.
Publikováno v:
A&A 598, A79 (2017)
Context. High resolution stellar spectral atlases are valuable resources to astronomy. They are rare in the $1 - 5\,\mu$m region for historical reasons, but once available, high resolution atlases in this part of the spectrum will aid the study of a
Externí odkaz:
http://arxiv.org/abs/1609.07873
We fit a sample of 49 R=6000 NIR (0.9 - 2.5 micron) T dwarf spectra obtained with Magellan's FIRE spectrograph with two different atmospheric model sets to compare the derived physical parameters such as Teff, log g, cloud opacity, and rotational vel
Externí odkaz:
http://arxiv.org/abs/1308.5235
Autor:
Nicholls, C. P., Melis, C., Soszyński, I., Udalski, A., Szymański, M. K., Kubiak, M., Pietrzyński, G., Poleski, R., Ulaczyk, K., Wyrzykowski, Ł., Kozłowski, S., Pietrukowicz, P.
We present mid-IR photometry and spectra of the merged binary V1309 Sco taken between 18 and 23 months after outburst. Strong mid-IR emission and a solid state absorption feature indicate the presence of a significant amount of dust in the circumstel
Externí odkaz:
http://arxiv.org/abs/1301.1694
Autor:
Burgasser, Adam J., Faherty, Jacqueline K., Schmidt, Sarah, West, Andrew A., Osorio, Maria Rosa Zapatero, Pineda, J. Sebastian, Burningham, Ben, Nicholls, C., Sanderson, Robyn, Shkolnik, Evgenya, Rodriguez, David, Riedel, Adric, Joergens, Viki
Kinematic investigations are being increasingly deployed in studies of the lowest mass stars and brown dwarfs to investigate their origins, characterize their atmospheres, and examine the evolution of their physical parameters. This article summarize
Externí odkaz:
http://arxiv.org/abs/1212.6942
Sequence E variables are close binary red giants that show ellipsoidal light variations. They are likely the immediate precursors of planetary nebulae (PNe) with close binary central. We have made a Monte Carlo simulation to determine the fraction of
Externí odkaz:
http://arxiv.org/abs/1204.2648
Autor:
Nicholls, C. P.
Publikováno v:
2011ASPC..445..167N
Roughly 30% of variable AGB stars show a Long Secondary Period, or LSP. These LSPs have posed something of a problem in recent years and their cause remains a mystery. By combining VLT-derived velocity curves with MACHO and OGLE light curves we were
Externí odkaz:
http://arxiv.org/abs/1201.1046
Autor:
Nicholls, C. P., Wood, P. R.
Modelling ellipsoidal variables with known distances can lead to exact determination of the masses of both components, even in the absence of eclipses. We present such modelling using light and radial velocity curves of ellipsoidal red giant binaries
Externí odkaz:
http://arxiv.org/abs/1201.1043
Sequence E variables are close binary red giants that show ellipsoidal light variations. They are likely to terminate their red giant evolution by a common envelope (CE) event when the red giant fills its Roche lobe, and produce close binary Planetar
Externí odkaz:
http://arxiv.org/abs/1111.4265