Evidence for Pulsationally Driven Mass-Loss from Mira Variables

Whitelock, Patricia; Pottasch, S. R.; Feast, M. W.

doi:10.1007/978-94-009-3813-7_40

Cited by 24 publications

(13 citation statements)

References 4 publications

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“…The mass loss-pulsation connection is actually already well-documented, both on observational and theoretical grounds. A correlation between the mass loss rate and the pulsation period or amplitude of variation in the K band has been noticed by various authors (Whitelock et al 1987(Whitelock et al , 1994 for O-rich Miras; Claussen et al 1987 andGroenewegen et al 1998 for C-rich Miras; Vassiliadis & Wood 1993 for a mixture of both). The various model calculations of mass loss in AGB stars have also shown the key importance of pulsations for triggering the mass loss process (see the discussion in Sect.…”

Section: The F12/f2 Index: Dust Mass Loss As a Function Of Luminositymentioning

confidence: 67%

Evolution of the dust mass loss with luminosity along the giant branch of the globular cluster 47 Tucanae

Ramdani

Jorissen

2001

A&A

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The present paper investigates the properties of the dust mass loss in stars populating the giant branch of the globular cluster 47 Tuc, by combining ISOCAM and DENIS data. Raster maps of 5 fields covering areas ranging from 4 × 4 to 15 × 15 arcmin 2 at different distances from the center of the cluster have been obtained with ISOCAM at 11.5 µm (LW10 filter). The covered fields include most of the red variables known in this cluster. A detection threshold of about 0.2 mJy is achieved, allowing to detect giant stars at 11.5 µm all the way down to the horizontal branch. No dust-enshrouded asymptotic giant branch stars have been found in the observed fields, contrary to the situation encountered in LMC/SMC globular clusters with larger turnoff masses. The color index [12] − [2] (based on the ISO 11.5 µm flux and on the DENIS K s magnitude) is used as a diagnostic of dust emission (and hence dust mass loss). Its evolution with luminosity along the giant branch reveals that dust mass loss is only present in V3 (the only cluster Mira variable observed in the present study) and in V18, a star presenting intermittent variability. This conclusion confirms the importance of stellar pulsations in the dust formation and ensuing mass loss.

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Section: The F12/f2 Index: Dust Mass Loss As a Function Of Luminositymentioning

confidence: 67%

Evolution of the dust mass loss with luminosity along the giant branch of the globular cluster 47 Tucanae

Ramdani

Jorissen

2001

A&A

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“…These relations could be connected to the link between the period and the estimated mass loss rate (Wood 1990). Whitelock et al (1986Whitelock et al ( , 1991 have shown that larger mass loss is correlated to longer period and larger amplitude. Furthermore, it has been mentioned in many works that LPVs with more asymmetric light curves lose mass more rapidly than those with symmetric ones (see the review by Jura & Kleinmann 1992a).…”

Section: Introductionmentioning

confidence: 99%

Mean light curves of long-period variables and discrimination between carbon- and oxygen-rich stars

Mennessier

Boughaleb

Mattei

1997

Astron. Astrophys. Suppl. Ser.

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“…The slope is not significantly different from that in other samples and the zero point is the same as in galactic globular clusters and the Magellanic Clouds if the same assumptions are made about the luminosity of the RR Lyrae stars in each system (Feast & Whitelock 1987).…”

Section: The Galactic Centrementioning

confidence: 57%

“…De Gioia-Eastwood et al (1981) have shown that the rate of mass loss increases monotonically with the period of an optical Mira, while Whitelock et al (1987) show that it is also related to the amplitude of pulsation at a given period.…”

Section: Circumstellar Dust Shellsmentioning

confidence: 99%

Observations of Long Period Variable Stars

Evans

1989

International Astronomical Union Colloquium

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The study of long period variable stars has been transformed in recent years by two observational developments. Large samples of stars have been observed at infrared wavelengths, providing knowledge of the intrinsic properties of the star as well as of circumstellar dust shells, and these observations have been extended to the variables in well defined stellar systems to allow their properties to be studied in relation to the stellar population to which they belong. Spectroscopic determinations of chemical composition have also provided several crucial insights.

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Evidence for Pulsationally Driven Mass-Loss from Mira Variables

Cited by 24 publications

References 4 publications

Evolution of the dust mass loss with luminosity along the giant branch of the globular cluster 47 Tucanae

Evolution of the dust mass loss with luminosity along the giant branch of the globular cluster 47 Tucanae

Mean light curves of long-period variables and discrimination between carbon- and oxygen-rich stars

Observations of Long Period Variable Stars

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