Results 41 to 50 of about 1,537 (221)

Recent Progress in Finding Binary Systems with the B[e] Phenomenon

Galaxies, 2023
This paper describes recent studies of the FS CMa-type objects, a group of stars showing the B[e] phenomenon defined in 2007. The objects exhibit strong emission-line spectra with both permitted and forbidden lines suggesting the presence of a B-type ...
Anatoly S. Miroshnichenko, Sergei V. Zharikov, Nadine Manset, Serik A. Khokhlov, Atilkhan S. Nodyarov, Valentina G. Klochkova, Stephen Danford, Aizhan K. Kuratova, Ronald Mennickent, S. Drew Chojnowski, Ashish Raj, Devendra Bisht   +11 more
doaj   +1 more source

Infrared spectroscopy and molecules in circumstellar envelopes [PDF]

International Astronomical Union Colloquium, 1994
During the last two decades there has been a tremendous renewal of interest in the circumstellar environment of evolved stars. This renewal has been mainly driven by sensitive microwave observing techniques. Microwave spectroscopy has resulted in a number of fundamental discoveries in circumstellar shells, including the discovery of maser lines and ...
openaire   +1 more source

SPECTROSCOPIC MONITORING OF THE B[E] OBJECTS FSCMA AND MOCAM

Odessa Astronomical Publications, 2019
Objects with the B[e] phenomenon exhibit permitted and forbidden emission lines due to the presence of circumstellar ionized gas and large infrared excesses due to processing of the stellar radiation by circumstellar dust.
A. K. Kuratova, A. S. Miroshnichenko, S. V. Zharikov, N. Manset, S. A. Khokhlov, A. Raj, A. V. Kusakin, I. V. Reva, R. I. Kokumbaeva, I. A. Usenko, A. Y. Knyazev   +10 more
doaj   +1 more source

CO line emission from circumstellar envelopes

, 2006
Aims.We present the results of a multi-transition CO observational program conducted on a sample of AGB and post-AGB stars envelopes. We have collected maps and single pointing observations of these envelopes in 5 rotational transitions ranging from J 
Phillips, T. G., H. Yoshida, T. G. Phillips, Yoshida, H., R. Hernandez, Bujarrabal, V., D. Teyssier, Lunar Hernández, María Del Rosario, V. Bujarrabal, Teyssier, D.   +9 more
core   +1 more source

Imaging the circumstellar envelopes of AGB stars

, 2006
International audienceAims.We report the results of an exploratory program to image the extended circumstellar envelopes of asymptotic giant branch (AGB) stars in dust-scattered galactic light.
P. J. Huggins, Mauron, N., Huggins, P. J., N. Mauron   +3 more
core   +1 more source

Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA

Frontiers in Astronomy and Space Sciences, 2023
The fact that whether SiC2 is a parent species, formed in the photosphere or as a by-product of high-temperature dust formation, or a daughter species, formed in chemistry driven by the photodestruction of the parent species in the outer envelope, has ...
Yanan Feng, Yanan Feng, Xiaohu Li, Xiaohu Li, Tom J. Millar, Ryszard Szczerba, Ke Wang, Donghui Quan, Donghui Quan, Shengli Qin, Shengli Qin, Xuan Fang, Xuan Fang, Xuan Fang, Xuan Fang, Juan Tuo, Juan Tuo, Zhenzhen Miao, Rong Ma, Rong Ma, Fengwei Xu, Fengwei Xu, Jingfei Sun, Biwei Jiang, Biwei Jiang, Qiang Chang, Jianchao Yang, Jianchao Yang, Gao-Lei Hou, Fangfang Li, Yong Zhang, Yong Zhang, Yong Zhang   +32 more
doaj   +1 more source

Equatorial Enhancement in the Dustiest OH/IR Stars in the Galactic Bulge

The Astrophysical Journal
We have detected the 10 μ m silicate feature and the 11.3 μ m crystalline forsterite feature in absorption in 21 oxygen-rich asymptotic giant branch stars in the Galactic bulge.
Steven R. Goldman, Jacco Th. van Loon, Olivia C. Jones, Joris A. D. L. Blommaert, Martin A. T. Groenewegen   +4 more
doaj   +1 more source

Photoelectron Spectroscopy of the Phosphorus Monosulfide (PS) and Phosphorus Monoxide (PO) Radicals

Small Structures, Volume 7, Issue 1, January 2026.
Sketch of the experiment to measure the photo electron spectrum of the PS radical produced in situ with a mixture of PH3, H2S and F atoms. PO and PS radicals are the smallest units of phosphorus oxides and phosphorus sulfides, respectively, two rich families of refractory compounds widely employed in industrial and technological applications. These two
Pedro Recio, Jorge Alonso de la Fuente, Myriam Drissi, Niyazi Bulut, Jean Christophe Loison, Gustavo Garcia, Susana Gomez Carrasco, Cristina Sanz Sanz, Luis Bañares, Sonia Marggi Poullain, Alexandre Zanchet   +10 more
wiley   +1 more source

Circumstellar envelopes as seen with millimeter interferometers

, 2006
I present a survey of recent discoveries concerning circumstellar envelopes around evolved stars: asymptotic giant branch stars and (proto-) planetary nebulae, and radiative techniques used to infer their ...
E. Josselin
core   +1 more source

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source