Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Alexander, Richard D"'
In multiple stellar systems interactions among the companion stars and their discs affect planet formation. In the circumstellar case tidal truncation makes protoplanetary discs smaller, fainter and less long-lived than those evolving in isolation, t
Externí odkaz:
http://arxiv.org/abs/2212.07711
Autor:
Acton, Jack S., Goad, Michael R., Raynard, Liam, Casewell, Sarah L., Jackman, James A. G., Alexander, Richard D., Anderson, David R., Bayliss, Daniel, Bryant, Edward M., Burleigh, Matthew R., Belardi, Claudia, Cooke, Benjamin F., Eigmüller, Phillip, Gill, Samuel, Jenkins, James S., Lendl, Monika, Louden, Tom, McCormac, James, Moyano, Maximiliano, Nielsen, Louise D., Tilbrook, Rosanna H., Udry, Stéphane, Watson, Christopher A., West, Richard G., Wheatley, Peter J., Vines, Jose I.
We present the discovery of NGTS J214358.5-380102, an eccentric M-dwarf binary discovered by the Next Generation Transit Survey. The system period of 7.618 days is greater than many known eclipsing M-dwarf binary systems. Its orbital eccentricity of
Externí odkaz:
http://arxiv.org/abs/2003.14314
Autor:
Bayliss, Daniel, Gillen, Edward, Eigmuller, Philipp, McCormac, James, Alexander, Richard D., Armstrong, David J., Booth, Rachel S., Bouchy, Francois, Burleigh, Matthew R., Cabrera, Juan, Casewell, Sarah L., Chaushev, Alexander, Chazelas, Bruno, Csizmadia, Szilard, Erikson, Anders, Faedi, Francesca, Foxell, Emma, Gansicke, Boris T., Goad, Michael R., Grange, Andrew, Gunther, Maximilian N., Hodgkin, Simon T., Jackman, James, Jenkins, James S., Lambert, Gregory, Louden, Tom, Metrailler, Lionel, Moyano, Maximiliano, Pollacco, Don, Poppenhaeger, Katja, Queloz, Didier, Raddi, Roberto, Rauer, Heike, Raynard, Liam, Smith, Alexis M. S., Soto, Maritza, Thompson, Andrew P. G., Titz-Weider, Ruth, Udry, Stephane, Walker, Simon. R., Watson, Christopher A., West, Richard G., Wheatley, Peter J.
We present the discovery of NGTS-1b, a hot-Jupiter transiting an early M-dwarf host ($T_{eff}=3916^{+71}_{-63}~K$) in a P=2.674d orbit discovered as part of the Next Generation Transit Survey (NGTS). The planet has a mass of $0.812^{+0.066}_{-0.075}~
Externí odkaz:
http://arxiv.org/abs/1710.11099
Investigating the molecular gas in the inner regions of protoplanetary disks provides insight into how the molecular disk environment changes during the transition from primordial to debris disk systems. We conduct a small survey of molecular hydroge
Externí odkaz:
http://arxiv.org/abs/1509.02172
Circumbinary planets have been observed at orbital radii where binary perturbations may have significant effects on the gas disk structure, on planetesimal velocity dispersion, and on the coupling between turbulence and planetesimals. Here, we note t
Externí odkaz:
http://arxiv.org/abs/1306.5241
Autor:
Ardila, David R., Herczeg, Gregory J., Gregory, Scott G., Ingleby, Laura, France, Kevin, Brown, Alexander, Edwards, Suzan, Johns-Krull, Christopher, Linsky, Jeffrey L., Yang, Hao, Valenti, Jeff A., Abgrall, Hervé, Alexander, Richard D., Bergin, Edwin, Bethell, Thomas, Brown, Joanna M., Calvet, Nuria, Espaillat, Catherine, Hillenbrand, Lynne A., Hussain, Gaitee, Roueff, Evelyne, Schindhelm, Rebecca, Walter, Frederick M.
For Classical T Tauri Stars (CTTSs), the resonance lines of N V, Si IV, and C IV, as well as the He II 1640 A line, act as diagnostics of the accretion process. Here we assemble a large high-resolution dataset of these lines in CTTSs and Weak T Tauri
Externí odkaz:
http://arxiv.org/abs/1304.3746
Autor:
France, Kevin, Schindhelm, Rebecca, Herczeg, Gregory J., Brown, Alexander, Abgrall, Herve, Alexander, Richard D., Bergin, Edwin A., Brown, Joanna M., Linsky, Jeffrey L., Roueff, Evelyne, Yang, Hao
The formation timescale and final architecture of exoplanetary systems are closely related to the properties of the molecular disks from which they form. Observations of the spatial distribution and lifetime of the molecular gas at planet-forming rad
Externí odkaz:
http://arxiv.org/abs/1207.4789
Publikováno v:
Mon.Not.Roy.Astron.Soc. 388 (2008) L64-L68
Observations of massive stars within the central parsec of the Galaxy show that, while most stars orbit within a well-defined disc, a significant fraction have large eccentricities and / or inclinations with respect to the disc plane. Here, we invest
Externí odkaz:
http://arxiv.org/abs/0804.3596
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2004 Jul . 101(28), 10363-10367.
Externí odkaz:
https://www.jstor.org/stable/3372897
