Post-T Tauri Stars in the Nearest OB Association

  title={Post-T Tauri Stars in the Nearest OB Association},
  author={Eric E. Mamajek and Michael R. Meyer and James William Liebert},
  journal={The Astronomical Journal},
  pages={1670 - 1694}
We present results of a spectroscopic survey of X-ray– and proper-motion–selected samples of late-type stars in the Lower Centaurus–Crux (LCC) and Upper Centaurus–Lupus (UCL) subgroups of the nearest OB association: Scorpius-Centaurus. The primary goals of the survey are to determine the star formation history of the OB subgroups and to assess the frequency of accreting stars in a sample dominated by "post–T Tauri" pre–main-sequence (PMS) stars. We investigate two samples: (1) proper-motion… 

Solar-Type Post-T Tauri Stars in the Nearest OB Subgroups

I discuss results from the recent spectroscopic survey for solar-type pre-MS stars in the Lower Centaurus-Crux (LCC) and Upper Centaurus-Lupus (UCL) OB subgroups by Mamajek, Meyer, & Liebert (2002,

Angular Momentum Evolution of Young Stars in the nearby Scorpius–Centaurus OB Association

We report the results of a study of archival SuperWASP light curves for stars in Scorpius–Centaurus (Sco–Cen), the nearest OB association. We use SuperWASP time-series photometry to extract rotation

The star formation history and accretion-disc fraction among the K-type members of the Scorpius–Centaurus OB association

We present results of a spectroscopic survey for new K- and M-type members of Scorpius-Centaurus (Sco-Cen), the nearest OB Association (~100-200 pc). Using an X-ray, proper motion and color-magnitude

Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life

We present an all-sky catalog of 2970 nearby (d . 50 pc), bright (J < 9) M- or late Ktype dwarf stars, 86% of which have been confirmed by spectroscopy. This catalog will be useful for searches for

Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. VIII. The late-type stellar component

We present results of an investigation of the X-ray properties, age distribution, and kinematical characteristics of a high-galactic latitude sample of late-type field stars selected from the ROSAT

A kinematic study and membership analysis of the Lupus star-forming region ?;??

Aims. A precise determination of the distance to individual stars is required to reliably determine the fundamental parameters (mass and age) of young stellar objects. This paper is dedicated to

A Gaia Survey for Young Stars Associated with the Lupus Clouds

  • K. Luhman
  • Physics, Environmental Science
    The Astronomical Journal
  • 2020
I have used high-precision photometry and astrometry from the second data release of the Gaia mission to perform a survey for young stars associated with the Lupus clouds, which have distances of

The ϵ Chamaeleontis Young Stellar Group and the Characterization of Sparse Stellar Clusters

We present the outcomes of a Chandra X-Ray Observatory snapshot study of five nearby Herbig Ae/Be (HAeBe) stars that are kinematically linked with the Oph-Sco-Cen association (OSCA). Optical

Formation scenarios for the young stellar associations between galactic longitudes l = 280-360 deg

We investigate the spatial distribution, the space velocities and age distribution of the pre-main sequence (PMS) stars belonging to Ophiuchus, Lupus and Chamaeleon star-forming regions (SFRs), and

Radial velocity measurements of B stars in the Scorpius-Centaurus association

We derive single-epoch radial velocities for a sample of 56 B-type stars members of the subgroups Upper Scorpius, Upper Centaurus Lupus and Lower Centaurus Crux of the nearby Sco-Cen OB association.



New weak-line T Tauri stars in Lupus (Krautter+ 1997)

We present first results obtained by a survey of the Lupus star forming region in search of new T Tauri stars. This study has been performed on the basis of deep pointed ROSAT observations in the

Discovery of Seven T Tauri Stars and a Brown Dwarf Candidatein the Nearby TW Hydrae Association

We report the discovery of five T Tauri star systems, two of which are resolved binaries, in the vicinity of the nearest known region of recent star formation: the TW Hydrae Association. The newly

The History of Low-Mass Star Formation in the Upper Scorpius OB Association

We use a large sample of about 100 low-mass pre–main-sequence (PMS) stars in the Upper Scorpius OB association to explore the star formation history and the initial mass function of this association.

Fast-rotating nearby solar-type stars - I. Spectral classification, v sin i, Li abundances and X-ray luminosities

We present the results of high-resolution spectroscopic and high-precision photometric observations on a sample of 129 late-F and G-type nearby stars selected on the basis of their large rotational

(CO)-C-12 molecular cloud survey and global star formation in Lupus

The Lupus star-forming region has been surveyed for molecular clouds in CO with the NANTEN radio telescope, and a cloud mass of 1.7× 104M has been revealed. We were able to detect 105 molecular

The stellar population of the Lupus clouds

We present photometric and spectroscopic observations of the H alpha emission stars in the Lupus dark cloud complex. We estimate the effective temperatures of the stars from their spectral types and

A Homogeneous Catalog of New UBV and H beta Photometry of B- and A-Type Stars in and around the Scorpius-Centaurus OB Association

As part of a thorough study of the luminosity function of Sco-Cen, UBV, and Hβ photometry has been acquired for a large number of mid B- to late A-type stars which are within or surrounding the

The evolution of the lithium abundances of solar-type stars. III - The Pleiades

New measurements of lithium in more than 100 Pleiades F, G, and K dwarfs are reported. Abundances are determined from spectrum synthesis fits to the data as well as from use of new covers of growth

Binary Masses as a Test for Pre-Main-Sequence Tracks

Observations of binaries have traditionally provided the means for ascertaining stellar masses. Here we use the published data on eight pre-main-sequence pairs to gauge the accuracy of our own,

A Candidate Substellar Companion to HR 7329

We present the discovery of a candidate substellar companion from a survey of nearby young stars made with the Near-Infrared Camera and Multiobject Spectrometer coronagraph on the Hubble Space