ISO mid-infrared spectroscopy of Galactic Bulge AGB stars

被引：0

作者：

Blommaert, J.A.D.L. ^{[1
]}

Groenewegen, M.A.T. ^{[1
]}

Okumura, K. ^{[2
]}

Ganesh, S. ^{[3
]}

Omont, A. ^{[4
]}

Cami, J. ^{[5
]}

Glass, I.S. ^{[6
]}

Habing, H.J. ^{[7
]}

Schultheis, M. ^{[8
]}

Simon, G. ^{[9
]}

Van Loon, J.Th. ^{[10
]}

机构：

[1] Inst. voor Sterrenkunde, K.U.Leuven, Celestijnenlaan 200 B, 3001 Leuven, Belgium

[2] Service d'Astrophysique, CEA, DAPNIA, Saclay, France

[3] Physical Research Laboratory, Ahmedabad, India

[4] Institut d'Astrophysique de Paris, CNRS, Paris, France

[5] SETI Institute, NASA Ames Research Center, United States

[6] South African Astronomical Observatory, South Africa

[7] Leiden Observatory, Leiden, Netherlands

[8] CNRS UMR6091, Observatoire de Besançon, Besançon, France

[9] GEPI, Observatoire de Paris, France

[10] Astrophysics Group, School of Physical and Geographical Sciences, Keele University, United Kingdom

来源：

Astronomy and Astrophysics | 1600年 / 460卷 / 02期

关键词：

Aims: To study the nature of Bulge AGB stars and in particular their circumstellar dust; we have analysed mid-infrared spectra obtained with the ISOCAM CVF spectrometer in three Bulge fields. Methods: The ISOCAM 5-16.5 μm CVF spectra were obtained as part of the ISOGAL infrared survey of the inner Galaxy. A classification of the shape of the 10 μm dust feature was made for each case. The spectra of the individual sources were modelled using a radiative transfer model. Different combinations of amorphous silicates and aluminium-oxide dust were used in the modelling. Results: Spectra were obtained for 29 sources of which 26 are likely to be Bulge AGB stars. Our modelling shows that the stars suffer mass loss rates in the range of 10-8-5 × 10-7 Mo/yr; which is at the low end of the mass-loss rates experienced on the thermally pulsing AGB. The luminosities range from 1700 to 7700 Lo as expected for a population of AGB stars with Minit of 1.5-2 Mo. In agreement with the condensation sequence scenario; we find that the dust content is dominated by Al 2O3 grains in this sample of low mass-loss rate stars. © ESO 2006;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

页码：555 / 563

共 50 条

[1] ISO mid-infrared spectroscopy of Galactic Bulge AGB stars
Blommaert, J. A. D. L.
Groenewegen, M. A. T.
Okumura, K.
Ganesh, S.
Omont, A.
Cami, J.
Glass, I. S.
Habing, H. J.
Schultheis, M.
Simon, G.
van Loon, J. Th.
ASTRONOMY & ASTROPHYSICS, 2006, 460 (02): : 555 - U105
[2] Mid-infrared observations of the Galactic bulge by the IRTS
Chan, KW
Roellig, TL
Onaka, T
Yamamura, I
Tanabe, T
1997 PACIFIC RIM CONFERENCE ON STELLAR ASTROPHYSICS, 1998, 138 : 37 - 40
[3] Understanding AGB evolution in Galactic bulge stars from high-resolution infrared spectroscopy
Uttenthaler, S.
Blommaert, J. A. D. L.
Wood, P. R.
Lebzelter, T.
Aringer, B.
Schultheis, M.
Ryde, N.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 451 (02) : 1750 - 1769
[4] Technetium in galactic bulge AGB stars
Uttenthaler, Stefan
Hron, Josef
Lebzelter, Thomas
Busso, Maurizio
Schultheis, Mathias
Kaeufl, Hans Ulrich
WHY GALAXIES CARE ABOUT AGB STARS: THEIR IMPORTANCE AS ACTORS AND PROBES, 2007, 378 : 139 - +
[5] FAR EVOLVED AGB STARS IN THE GALACTIC BULGE
VANDERVEEN, WECJ
HABING, HJ
ASTRONOMY & ASTROPHYSICS, 1990, 231 (02) : 404 - 418
[6] A mid-infrared imaging survey of post-AGB stars
Lagadec, Eric
Verhoelst, Tijl
Mekarnia, Djamel
Suarez, Olga
Zijlstra, Albert A.
Bendjoya, Philippe
Szczerba, Ryszard
Chesneau, Olivier
Van Winckel, Hans
Barlow, Michael J.
Matsuura, Mikako
Bowey, Janet E.
Lorenz-Martins, Silvia
Gledhill, Tim
PLANETARY NEBULAE: AN EYE TO THE FUTURE, 2012, (283): : 59 - +
[7] Mid-infrared period-magnitude relations for AGB stars
Glass, I. S.
Schultheis, M.
Blommaert, J. A. D. L.
Sahai, R.
Stute, M.
Uttenthaler, S.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 395 (01) : L11 - L15
[8] Galactic Wolf-Rayet stars in the mid-infrared
Smith, JD
Houck, JR
WOLF-RAYET PHENOMENA IN MASSIVE STARS AND STARBURST GALAXIES, 1999, (193): : 107 - 108
[9] Study of extremely reddened AGB stars in the Galactic bulge
Jimenez-Esteban, F. M.
Engels, D.
ASTRONOMY & ASTROPHYSICS, 2015, 579
[10] Study of extremely reddened AGB stars in the Galactic bulge
1600, EDP Sciences (579):

← 1 2 3 4 5 →