2000A&A...363L..25V


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET06:56:16

2000A&A...363L..25V - Astronomy and Astrophysics, volume 363, L25-28 (2000/11-2)

A young stellar group associated with HD 199143 (d = 48 pc).

VAN DEN ANCKER M.E., PEREZ M.R., DE WINTER D. and McCOLLUM B.

Abstract (from CDS):

We present new optical and ultraviolet spectroscopy of the anomalous EUV emitter HD 199143 (F8V). High resolution spectra in the H and Na I D wavelength regions show evidence for very rapid (a few hundred km/s) rotation of the stellar photosphere. Using archive IRAS data we also show that the star has excess emission above photospheric levels at 12µm. IUE data of HD 199143 reveal the presence of emission lines of Mg II, C I, C II, C III, C IV, Si IV, He II and N V and show a large variability, both in the continuum and line fluxes. We propose that all available data of HD 199143 can be explained by assuming that is has been spun up by accretion of material from a close T Tauri like companion, responsible for the emission lines, the ultraviolet variability and the excess infrared emission. The bursting or flaring nature of this object, mostly in high energies, could be explained as episodic mass transfer between the star and its close companion. We show that HD 199143 and the Li-rich late-type dwarf BD-17°6128 form a physical pair and suggest that both may be part of a new nearby (48pc) young (∼107yr) stellar association in Capricornius.

Abstract Copyright:

Journal keyword(s): stars: individual: HD 199143 - stars: peculiar - stars: rotation - Galaxy: open clusters and associations: general - ultraviolet: stars

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Tuc Moving Group MGr 00 00 -64.0           ~ 67 0
2 HD 6111 PM* 01 03 31.0237321890 +61 56 14.689312226   9.43 8.9     G5 13 0
3 * alf For ** 03 12 04.5273570 -28 59 15.433684 4.41 4.36 3.85 3.39 3.08 F6V+G7V 246 0
4 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 722 0
5 V* GW Ori Or* 05 29 08.3925564419 +11 52 12.653756566   10.83 10.10 9.52   G5/8Ve 303 0
6 HD 199143 ** 20 55 47.67398 -17 06 51.0440   7.84 7.32     F8V 107 0
7 HD 358623 BY* 20 56 02.738688 -17 10 53.80428   11.603 10.625 10.18 8.847 K7 80 0
8 NAME Capricornus stellar group MGr ~ ~           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.11.25-06:56:16

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