NStars 1: photometric surveyse --- | ---
NStars 2: proper motion stars
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NStars 1: photometric surveyse --- | ---
NStars 2: proper motion stars
Theses 100 sources fall between the giant-dominated sample of the brightest 2MASS
sources and the dwaf-dominated fainter targets. Cross-referencing against SIMBAD
leads to the identification of 21 sources. The majority are evolved giants - carbon stars
and AGB stars - but the sample also includes the nearby dwarfs, GJ 2005 and GJ 3877, and two T Tauri stars
(HW Lupi and SZ 66). One source is actually NGC 3251. Figure b1.1: The (RA, Dec), (J, (J-K)) and (J-H)/(H-K)
distributions of the 100 sources at intermediate (J, K) magnitudes. The green circles in the JHK diagram
plot data for known L dwarfs; the magneta points are known T Tauris or evolved stars in the intermediate sample.
Figure b1.1 plots the (RA, Dec) and colour-magnitude distributions for the sample. Most are grouped
near the Galactic Plane, particularly in the southern regions around the Galactic Bulge. Follow-up
spectrscopy of approximately half the sample from CTIO confirms most as evolved stars. Figure b1.2 plots
relevant data for the 34 stars which currently lack either identifications or spectroscopic observations from
this sample. Figure b1.2: The (RA, Dec), (J, (J-K)) and (J-H)/(H-K)
distributions of the remaining targets in the intermediate sample.
The Ultracool sample: II. The intermediate sources
Cross-referencing the sources
Faint sample
Bright sample
NStars Photometric
surveys index NStars home page INR home page
page by Neill Reid, last updated 1/03/2002