SIMBAD references

2008AJ....136.2483A - Astron. J., 136, 2483-2492 (2008/December-0)

A survey for a coeval, comoving group associated with HD 141569.

AARNIO A.N., WEINBERGER A.J., STASSUN K.G., MAMAJEK E.E. and JAMES D.J.

Abstract (from CDS):

We present the results of a search for a young stellar moving group associated with the star HD 141569–a nearby, isolated Herbig AeBe primary member of a 5±3 Myr-old triple star system on the outskirts of the Sco-Cen complex. Our spectroscopic survey identified a population of 21 Li-rich, ≲ 30 Myr-old stars within 30° of HD 141569 which possess similar proper motions with the star. The spatial distribution of these Li-rich stars, however, is not suggestive of a moving group associated with the HD 141569 triplet, but rather this sample appears cospatial with Upper Scorpius (US) and Upper Centaurus Lupus (UCL). We apply a modified moving cluster parallax method to compare the kinematics of these youthful stars with those of the US and UCL. Eight new potential members of US and five new potential members of UCL are identified. A substantial moving group with an identifiable nucleus within 15° (∼ 30 pc) of HD 141569 is not found in this sample. Evidently, the HD 141569 system formed ∼ 5 Myr ago in relative isolation, tens of parsecs away from the recent sites of star formation in the Ophiucus-Scorpius-Centaurus region.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: HD 141569 - stars: evolution - stars: individual: HD 141569 - stars: kinematics - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/136/2483): table1.dat table2.dat table3.dat>

Simbad objects: 81

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