Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Marang, F"'
Publikováno v:
2023A&A...670A..39Z
Aims: The analysis of combined photometry and spectroscopy of eccentric eclipsing binary systems facilitates the derivation of precise values for the parameters of the component stars and their orbits, thereby providing stringent tests of theories of
Externí odkaz:
http://arxiv.org/abs/2302.04595
ASAS, MACHO, OGLE and SAAO JHKL light curves of 13 stars, that have at some time been classified as D-type symbiotics, are analysed. Most of the near-IR light-curves that have been monitored over many years show long-term changes due to variable dust
Externí odkaz:
http://arxiv.org/abs/0906.4136
Autor:
Santander-Garcia, M., Corradi, R. L. M., Whitelock, P. A., Munari, U., Mampaso, A., Marang, F., Boffi, F., Livio, M.
We investigate the dynamics of the nebula around the symbiotic star Hen 2-147, determine its expansion parallax, and compare it with the distance obtained via the Period-Luminosity relation for its Mira variable. The geometry of the nebula is found t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701404
MWC 560 (V694 Mon) is one of the most enigmatic symbiotic system with a very active accretion-powered hot component. Such activity can be supported only by a luminous asymptotic giant branch star, i.e. a Mira or SR variable, with a high mass-loss rat
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611815
Autor:
O'Donoghue, D., Buckley, D. A. H., Balona, L. A., Bester, D., Botha, L., Brink, J., Carter, D. B., Charles, P. A., Christians, A., Ebrahim, F., Emmerich, R., Esterhuyse, W., Evans, G. P., Fourie, C., Fourie, P., Gajjar, H., Gordon, M., Gumede, C., de Kock, M., Koeslag, A., Koorts, W. P., Kriel, H., Marang, F., Meiring, J. G., Menzies, J. W., Menzies, P., Metcalfe, D., Meyer, B., Nel, L., O'Connor, J., Osman, F., Plessis, C. du, Rall, H., Riddick, A., Romero-Colmenero, E., Potter, S. B., Sass, C., Schalekamp, H., Sessions, N., Siyengo, S., Sopela, V., Steyn, H., Stoffels, J., Stoltz, J., Swart, G., Swat, A., Swiegers, J., Tiheli, T., Vaisanen, P., Whittaker, W., van Wyk, F.
Publikováno v:
Mon.Not.Roy.Astron.Soc.372:151-162,2006
We describe briefly the properties of the recently completed Southern African Large Telescope (SALT), along with its first light imager SALTICAM. Using this instrument, we present 4.3 hr of high speed unfiltered photometric observations of the eclips
Externí odkaz:
http://arxiv.org/abs/astro-ph/0607266
Autor:
Carciofi, A. C., Miroshnichenko, A. S., Kusakin, A. V., Bjorkman, J. E., Bjorkman, K. S., Marang, F., Kuratov, K. S., a-Lario, P. Garcí, Calderón, J. V. Perea, Fabregat, J., Magalhães, A. M.
Publikováno v:
Astrophys.J.652:1617-1625,2006
We present optical $WBVR$ and infrared $JHKL$ photometric observations of the Be binary system $\delta$ Sco, obtained in 2000--2005, mid-infrared (10 and $18 \mu$m) photometry and optical ($\lambda\lambda$ 3200--10500 \AA) spectropolarimetry obtained
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603274
Autor:
Kotnik-Karuza, D., Friedjung, M., Whitelock, P. A., Marang, F., Exter, K., Keenan, F. P., Pollacco, D. L.
Infrared and optical photometric and spectroscopic observations of the symbiotic nova RR Tel are used to study the effects and properties of dust in symbiotic binaries containing a cool Mira component, as well as showing "obscuration events" of incre
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603155
We present the results of optical and near-IR spectroscopic and near-IR photometric observations of the emission-line stars Hen3-298 and Hen3-303. Strong emission in the H-alpha line is found in both objects. The presence of Fe II and [O I] emission
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503155
Autor:
Maas, T., Van Winckel, H., Evans, T. Lloyd, Nyman, L. -A., Kilkenny, D., Martinez, P., Marang, F., van Wyk, F.
Publikováno v:
Astron.Astrophys.405:271-284,2003
We present an analysis of our extensive data-set on IRAS 08544-4431. It is the first object we discuss of our newly defined sample of stars, selected for their position in the 'RV Tauri' box in the IRAS [12]-[25], [25]-[60] two-color diagram. Moreove
Externí odkaz:
http://arxiv.org/abs/astro-ph/0306492
Autor:
Bedding, T. R., Zijlstra, A. A., Jones, A., Marang, F., Matsuura, M., Retter, A., Whitelock, P. A., Yamamura, I.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 337 (2002) 79
The nearby Mira-like variable L2 Pup is shown to be undergoing an unprecedented dimming episode. The stability of the period rules out intrinsic changes to the star, leaving dust formation along the line of sight as the most likely explanation. Episo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207485