2015A&A...575L...7B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST20:16:21

2015A&A...575L...7B - Astronomy and Astrophysics, volume 575, L7-7 (2015/3-1)

Detection of Keplerian dynamics in a disk around the post-AGB star AC Herculis.

BUJARRABAL V., CASTRO-CARRIZO A., ALCOLEA J. and VAN WINCKEL H.

Abstract (from CDS):

So far, only one rotating disk has been clearly identified and studied in AGB or post-AGB objects (in the Red Rectangle), by means of observations with high spectral and spatial resolution. However, disks are thought to play a key role in the late stellar evolution and are suspected to surround many evolved stars. We aim to extend our knowledge on these structures. We present interferometric observations of 12CO J=2-1 emission from the nebula surrounding the post-AGB star AC Her, a source belonging to a class of objects that share properties with the Red Rectangle and show hints of Keplerian disks. We clearly detect the Keplerian dynamics of a second disk orbiting an evolved star. Its main properties (size, temperature, central mass) are derived from direct interpretation of the data and model fitting. With this we confirm that there are disks orbiting the stars of this relatively wide class of post-AGB objects.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - radio lines: stars - planetary nebulae: individual: AC Her

Simbad objects: 5

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Number of rows : 5

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 V* RV Tau Mi* 04 47 06.7238218181 +26 10 45.530144720   11.00 9.80     K0 265 0
2 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 715 0
3 * 89 Her pA* 17 55 25.1884459710 +26 02 59.970100296 5.36 5.70 5.36 5.06 4.94 F2Ibp 386 0
4 V* AC Her pA* 18 30 16.2374666779 +21 52 00.618442618 8.00 7.79 7.01     F4Ibp 316 0
5 BD+03 3950 RV* 19 15 01.1800400072 +03 48 42.640112771   11.16 10.37     F8 32 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-20:16:21

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