1999A&A...348L..17W


Query : 1999A&A...348L..17W

1999A&A...348L..17W - Astronomy and Astrophysics, volume 348, L17-20 (1999/8-1)

On the formation of warm molecular layers.

WOITKE P., HELLING C., WINTERS J.M. and JEONG K.S.

Abstract (from CDS):

The levitation of the outer atmospheres of AGB stars by pulsations is proposed as possible mechanism to form ``warm molecular layers''. We compare the amounts of CO, H2O, CO2 and SO2 molecules found in an oxygen-rich dynamical model atmosphere with the values derived from recent ISO observations. In the model, the molecules are present in a layered structure behind shock waves which leads to a substantial increase of the column densities in comparison with static models. By additional non-LTE investigations, we calculate the vibrational and rotational excitation temperatures of these molecules and discuss the respective deviations from the kinetic gas temperature in view of the interpretation of the observations.

Abstract Copyright:

Journal keyword(s): infrared: stars - molecular processes - hydrodynamics - stars: late-type - stars: circumstellar matter

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1486 0
2 V* R Dor AB* 04 36 45.59127 -62 04 37.7974 7.84 6.98 5.40 2.71 -0.44 M8III:e 320 0
3 V* R Crt AB* 11 00 33.8525664720 -18 19 29.582708520   10.33 9.80     M7/8III 204 0
4 V* RT Vir AB* 13 02 37.9814644272 +05 11 08.362884984 10.07 9.07 7.41     M8III 306 0
5 V* SW Vir AB* 13 14 04.3830437280 -02 48 25.130666916 9.24 8.52 6.85     M7III: 254 0
6 V* S Vir Mi* 13 33 00.1101102072 -07 11 41.030844432 8.87 7.96 6.68     M6-7e 175 0
7 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 622 0
8 * g Her AB* 16 28 38.5485851 +41 52 54.040593 7.70 6.53 5.01 2.49 0.26 M6-III 370 0
9 V* UX Cyg Mi* 20 55 05.5117404456 +30 24 52.015482108   10.99 10.75     M6-6.5e 159 0
10 V* T Cep Mi* 21 09 31.7834766408 +68 29 27.231070884 9.15 8.82 7.33     M6-9e 373 0
11 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 584 0
12 V* R Cas Mi* 23 58 24.8682785040 +51 23 19.713029388 6.71 6.63 4.80     M6.5-9e 690 0

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2022.05.23-19:05:33

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