Results 51 to 60 of about 399 (137)

MILAN Sky Survey, a dataset of raw deep sky images captured during one year with a Stellina automated telescope. [PDF]

Data Brief, 2023
Parisot O, Hitzelberger P, Bruneau P, Krebs G, Destruel C, Vandame B.   +5 more
europepmc   +1 more source

The mystery of unidentified infrared emission bands. [PDF]

Astrophys Space Sci, 2022
Kwok S.
europepmc   +1 more source

Analyzing the Variability of Central Stars of Planetary Nebulae

, 2015
Close binary central stars are found at the center of about 10-15% of all planetary nebulae. These close binary systems’ light varies over time, due to different interactions between the two stars.
Webb, Andrew C
core  

Evolution of Planetary Nebulae I. An improved synthetic model [PDF]

, 2001
We present a new synthetic model to follow the evolution of a planetary nebula (PN) and its central star, starting from the onset of AGB phase up to the white dwarf cooling sequence. The model suitably combines various analytical prescriptions to account
M. A. T. Groenewegen, L. Girardi, P. Marigo, A. Weiss, GIRARDI L., GROENEWEGEN M. A. T., MARIGO, PAOLA, WEISS A.   +7 more
core   +1 more source

Analyzing the Periodicity in Proto-Planetary Nebulae

, 2020
Our research revolved around analyzing how the brightness of proto-planetary nebulae (PPNe) vary over time. The overall goal was to analyze their light curves for periodicity and to find what the periods are. PPNe are celestial objects in transition from
Egan, Sean, Grimm, Peyton
core  

Periodic Light Variability in Proto-Planetary Nebulae

, 2019
We are studying pulsational variability in proto-planetary nebulae (PPNe), an evolutionary stage of stars between the red giant and planetary nebula stages.
Vogl, David M
core  

UPPER LIMITS TO THE MAGNETIC FIELD IN CENTRAL STARS OF PLANETARY NEBULAE [PDF]

, 2020
More than about twenty central stars of planetary nebulae (CSPN) have been observed spectropolarimetrically, yet no clear, unambiguous signal of the presence of a magnetic field in these objects has been found.
A Asensio Ramos, R L M Corradi, R Manso Sainz, F Leone, M J Martínez González   +4 more
core  

Herschel Planetary Nebula Survey (HerPlaNS)

, 2014
The Herschel Planetary Nebula Survey (HerPlaNS) is one of the largest Open Time programs carried out by the Herschel Space Observatory, by which we simultaneously probe the dust and gas components of the circumstellar environments of evolved stars ...
Nordhaus, J., Siódmiak, N., Villaver, E., Nordon, R., Aleman, I., Zijlstra, A., Balick, B., Rattray, R. E., Exter, K. M., Blackman, E. G., Ueta, T., Sahai, R., Lopez, J. A., Hora, J. L., Chu, Y.-H., Wittkowski, M., Murakawa, K., Szczerba, R., Yamamura, I., McDonald, I., Vlemmings, Wouter,, Ramstedt, S., Montez, R., Sandin, C., Ladjal, D., Behar, E., De Marco, O., Tielens, Aggm, Hebden, K., van Hoof, P. A. M., Otsuka, M., Kastner, J. H., Izumiura, H.   +32 more
core  

The chemistry of compact planetary nebulae

, 2002
We report high-sensitivity millimetre observations of several molecular species (13CO, HCN, HNC, CN, HCO+ and N2H+) in a sample of compact planetary nebulae.
R. Bachiller, E. Josselin
core   +1 more source

ABUNDANCE ANOMALIES IN THE X-RAY SPECTRA OF PLANETARY NEBULAE NGC 7027 AND BD +303639

, 2002
We revisit Chandra observations of planetary nebulae NGC 7027 and BD +303639 in order to address the question of abundance anomalies in the X-ray–emitting gas.
Joel H. Kastner, Holly L. Maness, Saeqa D. Vrtilek, Kastner, Joel H., Maness, Holly L., Vrtilek, Saeqa D., Noam Soker, Soker, Noam   +7 more
core