Publications (10)
Tracing the development of dust around evolved stars: The case of 47 Tuc
T. Lebzelter, T. Posch, K. Hinkle +2
We observed mid-infrared (7.5-22 mum) spectra of AGB stars in the globular cluster 47 Tuc with the Spitzer telescope and find significant dust features of various types. Comparison…
MESS (Mass-loss of Evolved StarS), a Herschel Key Program
M. A. T. Groenewegen, C. Waelkens, M. J. Barlow +39
MESS (Mass-loss of Evolved StarS) is a Guaranteed Time Key Program that uses the PACS and SPIRE instruments on board the Herschel Space Observatory to observe a representative samp…
Silicon in the dust formation zone of IRC +10216 as observed with PACS and SPIRE on board Herschel
L. Decin, J. Cernicharo, M. J. Barlow +36
The interstellar medium is enriched primarily by matter ejected from evolved low and intermediate mass stars. The outflows from these stars create a circumstellar envelope in which…
Detection of the 69 μm band of crystalline forsterite in the Herschel MESS-program
B. L. de Vries, D. Klotz, R. Lombaert +13
In this article we present the detection of the 69 μm band of the crystalline olivine forsterite within the MESS key program of Herschel. We determine the temperature of the forst…
Detection of anhydrous hydrochloric acid, HCl, in IRC+10216 with the Herschel SPIRE and PACS spectrometers
J. Cernicharo, L. Decin, M. J. Barlow +31
We report on the detection of anhydrous hydrochloric acid (hydrogen chlorine, HCl) in the carbon-rich star IRC+10216 using the spectroscopic facilities onboard the Herschel satelli…
PACS and SPIRE Spectroscopy of the Red Supergiant VY CMa
P. Royer, L. Decin, R. Wesson +34
With a luminosity > 10^5 Lsun and a mass-loss rate of about 2.10-4 Msun/yr, the red supergiant VY CMa truly is a spectacular object. Because of its extreme evolutionary state, it c…
Discovery of multiple dust shells beyond 1 arcmin in the circumstellar envelope of IRC+10216 using Herschel/PACS
L. Decin, P. Royer, N. L. J. Cox +9
We present new Herschel/PACS images at 70, 100, and 160 micron of the well-known, nearby, carbon-rich asymptotic giant branch star IRC+10216 revealing multiple dust shells in its c…
The detached dust shells of AQ And, U Ant, and TT Cyg
F. Kerschbaum, D. Ladjal, R. Ottensamer +14
Detached circumstellar dust shells are detected around three carbon variables using Herschel-PACS. Two of them are already known on the basis of their thermal CO emission and two a…
Herschel PACS and SPIRE imaging of CW Leo
D. Ladjal, M. J. Barlow, M. A. T. Groenewegen +25
Herschel PACS and SPIRE images have been obtained over a 30'x30' area around the well-known carbon star CW Leo (IRC +10 216). An extended structure is found in an incomplete arc of…
Warm water vapour in the sooty outflow from a luminous carbon star
L. Decin, M. Agundez, M. J. Barlow +34
In 2001, the discovery of circumstellar water vapour around the ageing carbon star IRC+10216 was announced. This detection challenged the current understanding of chemistry in old…