Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Siódmiak, N."'
Autor:
Aleman, I., Ueta, T., Ladjal, D., Exter, K. M., Kastner, J. H., Montez, R., Tielens, A. G. G. M., Chu, Y. H., Izumiura, H., McDonald, I., Sahai, R., Siodmiak, N., Szczerba, R., van Hoof, P. A. M., Villaver, E., Vlemmings, W., Wittkowski, M., Zijlstra, A. A.
We report the first detections of OH$^+$ emission in planetary nebulae (PNe). As part of an imaging and spectroscopy survey of 11 PNe in the far-IR using the PACS and SPIRE instruments aboard the Herschel Space Observatory, we performed a line survey
Externí odkaz:
http://arxiv.org/abs/1404.2431
Autor:
Ueta, T., Ladjal, D., Exter, K. M., Otsuka, M., Szczerba, R., Siódmiak, N., Aleman, I., van Hoof, P. A. M., Kastner, J. H., Montez, R., McDonald, I., Wittkowski, M., Sandin, C., Ramstedt, S., De Marco, O., Villaver, E., Chu, Y. -H., Vlemmings, W., Izumiura, H., Sahai, R., Lopez, J. A., Balick, B., Zijlstra, A., Tielens, A. G. G. M., Rattray, R. E., Behar, E., Blackman, E. G., Hebden, K., Hora, J. L., Murakawa, K., Nordhaus, J., Nordon, R., Yamamura, I
This is the first of a series of investigations into far-IR characteristics of 11 planetary nebulae (PNs) under the Herschel Space Observatory Open Time 1 program, Herschel Planetary Nebula Survey (HerPlaNS). Using the HerPlaNS data set, we look into
Externí odkaz:
http://arxiv.org/abs/1403.2494
Autor:
Szczerba, R., Siódmiak, N., Stasińska, G., Borkowski, J., García-Lario, P., Suárez, O., Hajduk, M., García-Hernández, D. A.
The investigation of post-AGB objects (proto-planetary nebulae) is very important from the standpoint of physical and chemical changes occurring during the late stages of stellar evolution. The Toru\'n catalogue of Galactic post-AGB and related objec
Externí odkaz:
http://arxiv.org/abs/1110.3924
The results from a Hubble Space Telescope (HST) snapshot survey of post-AGB objects are shown. The aim of the survey is to complement existing HST images of PPN and to connect various types of nebulosities with physical and chemical properties of the
Externí odkaz:
http://arxiv.org/abs/0801.4612
With the ongoing AKARI infrared sky survey, of much greater sensitivity than IRAS, a wealth of post-AGB objects may be discovered. It is thus time to organize our present knowledge of known post-AGB stars in th galaxy with a view to using it to searc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703717
We construct a data base of 125 post-AGB objects (including R CrB and extreme helium stars) with published photospheric parameters (effective temperature and gravity) and chemical composition. We estimate the masses of the post-AGB stars by comparing
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601504
Publikováno v:
AIP Conf.Proc.804:214-217,2006
With the aim to investigate the overall evolution of UIR band features with hardening of UV radiation (increase of the star's effective temperature) we have analysed ISO spectra for 32 C-rich stars: 20 proto-planetary nebulae and 12 planetary nebulae
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510306
Publikováno v:
Astron.Astrophys. 405 (2003) 627-638
We have measured angular dimensions of 312 planetary nebulae from their images obtained in Halpha (or Halpha + [NII]). We have applied three methods of measurements: direct measurements at the 10% level of the peak surface brightness, Gaussian deconv
Externí odkaz:
http://arxiv.org/abs/astro-ph/0304433
We have analyzed ISO SWS 01 observations for 61 proto-planetary nebulae candidates and classified their spectra according to their dominant chemistry. On the basis of our classification and the more general classification of SWS 01 spectra by Kraemer
Externí odkaz:
http://arxiv.org/abs/astro-ph/0212239
Autor:
Siodmiak, N., Tylenda, R.
We have analysed the radio fluxes for 264 planetary nebulae for which reliable measurements of fluxes at 1.4 and 5 GHz, and of nebular diameters are available. For many of the investigated nebulae the optical thickness is important, especially at 1.4
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105303