Cool stars in NGC 2547 and pre-main-sequence lithium depletion
@article{Jeffries2003CoolSI, title={Cool stars in NGC 2547 and pre-main-sequence lithium depletion}, author={R D Jeffries and J M Oliveira and David Barrado y Navascu{\'e}s and UK J.R.StaufferKeeleUniversity and Laeff and Madrid and Sirtf Science Center}, journal={Monthly Notices of the Royal Astronomical Society}, year={2003}, volume={343}, pages={1271-1284} }
We present the results of a spectroscopic survey of X-ray-selected, low-mass candidate members of the young open cluster NGC 2547. Using a combination of photometry, spectroscopic indices and radial velocities, we refineour candidate list and then use our spectroscopy to study the progression of lithium depletion in low-mass pre-main-sequence stars. We derive lithium abundances or upper limits for all our candidate members, which have effective temperatures in the range 5000 > T e f f > 3200 K…
Figures and Tables from this paper
28 Citations
The Lithium depletion boundary in NGC 2547 as a test of pre-main-sequence evolutionary models
- Physics, Geology
- 2005
Intermediate resolution spectroscopy from the European Southern Observatory Very Large Telescope is analysed for 63 photometrically selected low-mass (0.08-0.30 M ○. ) candidates of the open cluster…
A lithium depletion boundary age of 22 Myr for NGC 1960
- Physics
- 2013
We present a deep Cousins RI photometric survey of the open cluster NGC 1960, complete to R C ≃ 22, I C ≃ 21, that is used to select a sample of very low mass cluster candidates. Gemini spectroscopy…
IC 2602: a lithium depletion boundary age and new candidate low-mass stellar members*
- Geology, Physics
- 2010
We report the results from a photometric and spectroscopic survey of ∼1.4 deg 2 of the young open cluster IC 2602. Fourteen objects have been identified as having magnitudes, spectral types and…
Spectroscopy of Very Low Mass Stars and Brown Dwarfs in IC 2391: Lithium Depletion and Hα Emission
- Physics
- 2004
We have obtained intermediate-resolution optical spectroscopy of 44 candidate very low mass members of the nearby young open cluster IC 2391. Of these, 26 spectra are totally new, 14 had been…
The Keele-Exeter young cluster survey - I. Low-mass pre-main-sequence stars in NGC 2169
- Physics, Geology
- 2007
We have used R c l c CCD photometry from the Isaac Newton telescope and intermediate-resolution spectroscopy from the Gemini North telescope to identify and characterize low-mass (0.15 < M /M ⊙ <…
Lithium Abundances in the alpha Per Cluster
- Physics, Environmental Science
- 2010
Lithium abundances are presented and discussed for 70 members of the 50 Myr old open cluster alpha Per. More than half of the abundances are from new high-resolution spectra. The Li abundance in the…
Low-mass members of the young cluster IC 4665 and pre-main-sequence lithium depletion
- Physics, Geology
- 2009
We have used fibre spectroscopy to establish cluster membership and examine pre-mainsequence (PMS) lithium depletion for low-mass stars (spectral types F to M) in the sparse young (� 30 Myr) cluster…
Low mass stars, brown dwarf candidates and the mass function of the young open cluster NGC 2547
- Physics, Geology
- 2004
We present a catalogue of R c I c Z photometry over an area of 0.855 square degrees, centred on the young open cluster NGC 2547. The survey is substantially complete to limits of R c = 21.5, I c =…
The Monitor project: rotation of low-mass stars in the open cluster NGC 2547: Rotation of low-mass stars in NGC 2547
- Physics
- 2007
We report on the results of a V and i-band time-series photometric survey of M34 (NGC 1039) using the Wide Field Camera (WFC) on the Isaac Newton Telescope (INT), achieving better than 1% precision…
Search for associations containing young stars (SACY) - III. Ages and Li abundances
- Physics
- 2009
Context. Our study is a follow-up of the SACY project, an extended high spectral resolution survey of more than two thousand optical counterparts of X-ray sources in the Southern Hemisphere targeted…
References
SHOWING 1-10 OF 54 REFERENCES
The lithium depletion boundary and the age of NGC 2547
- Physics
- 2000
We present the results of a photometric and spectroscopic survey of cool M dwarf candidates in the young open cluster NGC 2547. Using the 2dF fibre spectrograph, we have searched for the luminosity…
Rotation and lithium in the late-type stars of NGC 2516
- Physics
- 1998
We present CCD photometry and high-resolution spectroscopy of low-mass stars in the open cluster NGC 2516, which has an age of about 150Myr and may have a much lower metallicity than the Pleiades. 24…
The Evolution of the Lithium Abundances of Solar-Type Stars. VIII. M67 (NGC 2682)
- Physics
- 1999
We have used the HIRES spectrograph on the Keck 10 m telescope to obtain echelle spectra of 25 solar-type stars in the old open cluster M67 (NGC 2682) and have used these spectra to derive lithium…
Membership, metallicity and lithium abundances for solar-type stars in NGC 6633
- Physics
- 2002
We present spectroscopic observations of candidate F, G and K type stars in NGC 6633, an open cluster with a similar age to the Hyades. From the radial velocities and metal-line equivalent widths we…
Lithium and halpha in stars and brown dwarfs of sigma orionis
- Physics, Geology
- 2002
We present intermediate- and low-resolution optical spectra around Hα and Li I λ6708 A for a sample of 25 low mass stars and 2 brown dwarfs with confirmed membership in the pre-main sequence stellar…
Membership, lithium, and metallicity in the young open clusters IC 2602 and IC 2391: Enlarging the sample ?;??
- Physics
- 2001
We present lithium abundances for50 X-ray selected candidate members of the 30{50 Myr old open clusters IC 2602 and IC 2391. These data enlarge and extend to cooler temperatures previous Li surveys…
Pre--Main-Sequence Stars in the Young Cluster IC 2391
- Physics
- 1989
Seven or eight new, late-type members of the poor open cluster IC 2391 are identified, and membership is confirmed for two other stars. The new members fall approximately along a 3 x 10 to the 7th yr…
Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades
- Physics, Geology
- 1998
We have obtained intermediate resolution spectra of 11 candidate brown dwarf members of the Pleiades open cluster using the Keck II telescope and Low-Resolution Imaging Spectrograph. Our primary goal…
The Lithium-Depletion Boundary and the Age of the Young Open Cluster IC 2391
- Geology, Physics
- 1999
In previous programs, we have identified a large number of possible, very low mass members of the young open cluster IC 2391 based on their location in an I versus (R-I)c color-magnitude diagram. We…
X-ray emission and low-mass stars in the young open cluster NGC 2547
- Physics
- 1998
We present the results of deep ROSAT High Resolution Imager X-ray observations and broad-band BVIC CCD photometry of the young open cluster NGC 2547. We have been able to find cluster counterparts…