Astronomy and Astrophysics, volume 410, 269-282 (2003/10-4)
The short period multiplicity among T Tauri stars.
Abstract (from CDS):
We present the results of high-resolution spectroscopic observations carried out over three years aimed at estimating the short-period (Porb
<100days) binary frequency of a sample of T Tauri stars in Oph-Sco, Cha, Lup, CrA star forming regions (SFRs), already observed with high angular resolution techniques by Ghez et al. (1993AJ....106.2005G
) and by Ghez et al. (1997ApJ...481..378G
) to detect wider components. When combining all four SFRs, the short-period binary frequency is indistinguishable from that found by Duquennoy & Mayor (1991A&A...248..485D
) for the solar-type field stars which is also consistent with the previous result obtained by Mathieu (1992, IAU Colloq., 135, 30 and 1994ARA&A..32..465M
). When Oph-Sco is analyzed separately, it seems that there is an excess of short-period binaries of a factor 2-2.5. On the contrary, short-period binary systems seem to be absent in the sample containing stars in Cha/Lup/CrA. Such a trend was equally found by Mathieu (1992, IAU Colloq., 135, 30) in Taurus. An excess of spectroscopic systems among the components of visual multiple systems is also observed.
stars: binaries: close - stars: formation
Table 1 : NTTS 160815-1857 = NTTS 160814-1857.
View the reference in ADS
To bookmark this query, right click on this link: simbad:2003A&A...410..269M and select 'bookmark this link' or equivalent in the popup menu