Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Lawson, Warrick A."'
Autor:
Murphy, Simon J., Lawson, Warrick A., Onken, Christopher A., Yong, David, Da Costa, Gary S., Zhou, George, Mamajek, Eric E., Bell, Cameron P. M., Bessell, Michael S., Feinstein, Adina D.
We present the characterization of CRTS J055255.7$-$004426 (=THOR 42), a young eclipsing binary comprising two pre-main sequence M dwarfs (combined spectral type M3.5). This nearby (103 pc), short-period (0.859 d) system was recently proposed as a me
Externí odkaz:
http://arxiv.org/abs/1911.05925
An absorption feature is occasionally reported around 11 microns in astronomical spectra, including those of forming stars. Candidate carriers include water ice, polycyclic aromatic hydrocarbons (PAHs), silicon carbide, crystalline silicates or even
Externí odkaz:
http://arxiv.org/abs/1601.02329
We report the serendipitous discovery of several young mid-M stars found during a search for new members of the 30-40 Myr-old Octans Association. Only one of the stars may be considered a possible Octans(-Near) member. However, two stars have proper
Externí odkaz:
http://arxiv.org/abs/1507.08002
Autor:
Murphy, Simon J., Lawson, Warrick A.
The Octans association is one of several young stellar moving groups recently discovered in the Solar neighbourhood, and hence a valuable laboratory for studies of stellar, circumstellar disc and planetary evolution. However, a lack of low-mass membe
Externí odkaz:
http://arxiv.org/abs/1411.5703
We present a comprehensive investigation of the Epsilon Chamaeleontis association (Epsilon Cha), one of several young moving groups spread across the southern sky. We re-assess the putative membership of Epsilon Cha using the best-available proper mo
Externí odkaz:
http://arxiv.org/abs/1305.4177
In the scope of the star formation process, it is unclear how the environment shapes the initial mass function (IMF). While observations of open clusters propose a universal picture for the IMF from the substellar domain up to a few solar masses, the
Externí odkaz:
http://arxiv.org/abs/1303.0193
We report the discovery of two young M-dwarfs, RX J0942.7-7726 (M1) and 2MASS J09424157-7727130 (M4.5), that were found only 42 arcsec apart in a survey for pre-main sequence stars surrounding the open cluster eta Chamaeleontis. Both stars have congr
Externí odkaz:
http://arxiv.org/abs/1205.1510
Autor:
Roccatagliata, Veronica, Bouwman, Jeroen, Henning, Thomas, Gennaro, Mario, Feigelson, Eric, Kim, Jinyoung Serena, Sicilia-Aguilar, Aurora, Lawson, Warrick A.
We present a deep Spitzer/IRAC survey of the OB association IC 1795 carried out to investigate the evolution of protoplanetary disks in regions of massive star formation. Combining Spitzer/IRAC data with Chandra/ACIS observations, we find 289 cluster
Externí odkaz:
http://arxiv.org/abs/1103.5770
Autor:
Bullock, Eric, Szkody, Paula, Mukadam, Anjum S., Borges, Bernardo W., Fraga, Luciano, Gänsicke, Boris T., Harrison, Thomas E., Henden, Arne, Holtzman, Jon, Howell, Steve B., Lawson, Warrick A., Levine, Stephen, Plotkin, Richard M., Seibert, Mark, Templeton, Matthew, Teske, Johanna, Vrba, Frederick J.
The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from GALEX and ground-based optical photometry and spectroscopy to follow GW Lib for three years following t
Externí odkaz:
http://arxiv.org/abs/1101.1238
We have identified several lithium-rich low-mass (0.08
Externí odkaz:
http://arxiv.org/abs/1012.2642