2018A&A...616A..91G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:31:53

2018A&A...616A..91G - Astronomy and Astrophysics, volume 616A, 91-91 (2018/8-1)

Dust cleansing of star-forming gas. I. Has radiation from bright stars affected the chemical composition of the Sun and M 67?

GUSTAFSSON B.

Abstract (from CDS):


Aims. We explore the possibility that solar chemical composition, as well as the similar composition of the rich open cluster M 67, have been affected by dust cleansing of the presolar or precluster cloud due to the radiative forces from bright early-type stars in its neighbourhood.
Methods. We estimate possible cleansing effects using semi-analytical methods, which are essentially based on momentum conservation.
Results. Our calculations indicate that the amounts of cleansed neutral gas are limited to a relatively thin shell surrounding the HII region around the early-type stars.
Conclusions. It seems possible that the proposed mechanism acting in individual giant molecular clouds may produce significant abundance effects for masses corresponding to single stars or small groups of stars. The effects of cleansing are, however, severely constrained by the thinness of the cleansed shell of gas and by turbulence in the cloud. This is why the mechanism can hardly be important in cleansing masses corresponding to rich clusters, such as the mass of the original M 67.

Abstract Copyright: © ESO 2018

Journal keyword(s): Sun: abundances - stars: abundances - stars: early-type - dust - extinction - open clusters and associations: individual: Messier 67 - radiation mechanisms: general

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1734 1
2 BD+50 1471 PM* 07 48 06.4726006390 +50 13 32.921121328   12.002 11.138 10.669 10.243 G9V 140 1
3 BD+50 1471B PM* 07 48 07.4814220176 +50 13 03.257811342   11.927 11.086 10.631 10.216 G9V 40 0
4 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2032 0
5 HD 133131A PM* 15 03 35.4462766650 -27 50 33.220140030   9.05 8.46 9.18   G2V 21 0
6 BD+36 2593 * 15 19 57.9205371377 +36 13 46.737977732   11.83 11.12     F 83 1
7 * 16 Cyg ** 19 41 49.09 +50 31 31.6           ~ 121 0
8 CD-34 14724A PM* 20 55 07.9445087070 -34 08 08.007683146   10.74 10.05 10.17 9.774 F8 33 0
9 HD 240429 PM* 23 51 55.0287723390 +59 42 48.599105920   10.28 9.70     K0 19 0
10 HD 240430 PM* 23 52 09.2435257553 +59 42 26.518874234   10.16 9.56     G0 20 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-22:31:53

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