C. M. Lisse, C. A. Beichman, G. Bryden, M. C. Wyatt,
... the debris found around the K0 V star HD 69830. Using a robust approach to determine the bulk average mineralogical composition of the dust, we show it to be substantially different from that found for comets 9P/Tempel 1 and C/Hale-Bopp 1995 O1 or for the comet-dominated YSO HD 100546. Lacking in carbonaceous and ferrous materials but including small icy grains, the composition of the HD 69830 dust most closely resembles that of a disrupted ...
Tópico(s): Stellar, planetary, and galactic studies
2007 - IOP Publishing | The Astrophysical Journal
C. A. Beichman, C. M. Lisse, Angelle Tanner, G. Bryden, Rachel Akeson, David R. Ciardi, A. F. Boden, Sarah Dodson-Robinson, Colette Salyk, M. C. Wyatt,
... with the break-up of one or more C-type asteroids formed in the dry, inner regions of the protoplanetary disk of the HD 69830 system. The modeling of the spectral energy distribution ...
Tópico(s): Astrophysics and Star Formation Studies
2011 - IOP Publishing | The Astrophysical Journal
Matthew J. Payne, Eric B. Ford, M. C. Wyatt, Mark Booth,
The star HD 69830 exhibits radial velocity variations attributed to three planets as well as infrared emission at 8–35 μm attributed to a warm debris disc. Previous studies by Alibert et al. and Wyatt et al. have developed models for the planet migration and mass growth and the replenishment of warm grains. In this paper, we perform n-body integrations in order to explore the implications of these models for (1) the excitation of planetary eccentricity, (2) the accretion and clearing of a putative ...
Tópico(s): Astrophysics and Star Formation Studies
2009 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Y. Alibert, I. Baraffe, W. Benz, G. Chabrier, C. Mordasini, C. Lovis, M. Mayor, F. Pepe, F. Bouchy, D. Queloz, S. Udry,
Since the discovery of the first giant planet outside the solar system in 1995 (Mayor & Queloz 1995, Nature, 378, 355), more than 180 extrasolar planets have been discovered. With improving detection capabilities, a new class of planets with masses 5–20 times larger than the Earth, at close distance from their parent star is rapidly emerging. Recently, the first system of three Neptune-mass planets has been discovered around the solar type star HD 69830 (Lovis et al. 2006, Nature, 441, 305). Here, we ...
Tópico(s): Astrophysics and Star Formation Studies
2006 - EDP Sciences | Astronomy and Astrophysics
... The ‘disc-aligned’ masses of HD 69830 b, HD 69830 c, and 61 Vir b suggests that they may ...
Tópico(s): Astrophysical Phenomena and Observations
2024 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Angelle Tanner, Tabetha S. Boyajian, Kaspar von Braun, Stephen R. Kane, John M. Brewer, C. Farrington, Gerald van Belle, Charles Beichman, Debra A. Fischer, Theo A. ten Brummelaar, Harold A. McAlister, Gail Schaefer,
We used the CHARA Array to directly measure the angular diameter of HD 69830, home to three Neptune mass planets and an asteroid belt. Our measurement of 0.674 ± 0.014 mas for the limb-darkened angular diameter of this star leads to a physical radius of R* = 0.9058 ± 0.0190 R☉ and luminosity of L* = 0.622 ± 0.014 L☉ when combined with a fit to the spectral energy distribution of the star. Placing these observed values on an Hertzsprung–Russel diagram along with stellar evolution isochrones produces an age ...
Tópico(s): Astrophysics and Star Formation Studies
2015 - IOP Publishing | The Astrophysical Journal
Charles Beichman, G. Bryden, T. N. Gautier, Karl R. Stapelfeldt, M. W. Werner, K. A. Misselt, G. H. Rieke, J. A. Stansberry, David E. Trilling,
Spitzer photometry and spectroscopy of the star HD 69830 reveal an excess of emission relative to the stellar photosphere between 8 and 35 μm dominated by strong features attributable to crystalline silicates with an emitting surface area more than 1000 times that of our zodiacal cloud. The spectrum closely resembles that of the comet C/1995 O1 (Hale-Bopp). Since no excess is detected at 70 μm, the emitting material must be quite warm, be confined within a ...
Tópico(s): Stellar, planetary, and galactic studies
2005 - IOP Publishing | The Astrophysical Journal
Matthew J. Payne, Eric B. Ford, M. C. Wyatt, Mark Booth,
The planetary system of HD 69830 is uniquely constrained by observations of (i) an infrared excess indicative of a debris disk with warm dust and (ii) radial velocity variations indicative of three planets. This presents a valuable opportunity to test planet formation models by integrating dynamical models of planetary formation and migration with those for the sculpting of a dust-producing planetesimal disk. We perform n-body simulations and investigate the excitation of both planet and planetesimal ...
Tópico(s): Astrophysics and Star Formation Studies
2010 - EDP Sciences | EAS Publications Series
... HD 105234, HD 15407A, BD+20 307, HD 69830, and HD 172555 are found to have a compositions similar to that expected for C-type asteroids, TYC 9410-532-1 resembles the ...
Tópico(s): Spectroscopy and Chemometric Analyses
2021 - | American Journal of Undergraduate Research
Matthew J. Payne, Eric B. Ford, M. C. Wyatt, Mark Booth,
Abstract Previous studies have developed models for the growth and migration of three planets orbiting HD 69830. We perform n-body simulations using MERCURY (Chambers 1999) to explore the implications of these models for: 1) the excitation of planetary orbits via planet-planet interactions, 2) the accretion and clearing of a putative planetesimal disk, 3) the distribution of planetesimal orbits following migration, and 4) the implications for the origin of the observed infrared emission from the ...
Tópico(s): Astrophysics and Star Formation Studies
2008 - Cambridge University Press | Proceedings of the International Astronomical Union
N. Hara, Gwenaël Boué, J. Laskar, A. C. M. Correia,
... systems with published radial velocity data sets: HD 69830, HD 10180, 55 Cnc, GJ 876 and a simulated ...
Tópico(s): Astronomy and Astrophysical Research
2016 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
G. M. Kennedy, Luca Matrà, M. Marmier, J. S. Greaves, M. C. Wyatt, G. Bryden, W. S. Holland, C. Lovis, Brenda C. Matthews, F. Pepe, B. Sibthorpe, S. Udry,
... of the four nearby G-type stars (with HD 69830 and 61 Vir) that form the basis of ... in the three systems with Kuiper belt analogues (HD 69830 has only a warm dust detection), concluding that 61 Vir and HD 38858 have greater radial disc extent than HD ...
Tópico(s): Astrophysics and Star Formation Studies
2015 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
M. C. Wyatt, Mark Booth, Matthew J. Payne, L. J. Churcher,
... at 1 au, such as η Corvi and HD 69830, as anomalous since collisional processing should have removed ... population remains challenging. The mid-infrared excess to HD 69830 can be explained by the ongoing destruction of ...
Tópico(s): Stellar, planetary, and galactic studies
2009 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Steven S. Vogt, Robert A. Wittenmyer, R. Paul Butler, S. J. O’Toole, Gregory W. Henry, Eugenio J. Rivera, Stefano Meschiari, Gregory Laughlin, C. G. Tinney, H. R. A. Jones, Jeremy Bailey, Brad Carter, Konstantin Batygin,
... mass planet. It joins HD 75732 (55 Cnc), HD 69830, GJ 581, HD 40307, and GJ 876 as a growing group ...
Tópico(s): Astronomy and Astrophysical Research
2009 - IOP Publishing | The Astrophysical Journal
G. Bryden, Charles Beichman, John M. Carpenter, G. H. Rieke, Karl R. Stapelfeldt, M. W. Werner, A. M. Tanner, Samantha Lawler, M. C. Wyatt, David E. Trilling, K. Y. L. Su, Myra Blaylock, J. A. Stansberry,
... 24 and/or 70 μm. Only one star, HD 69830, has IR excess exclusively at 24 μm, indicative ...
Tópico(s): Astro and Planetary Science
2009 - IOP Publishing | The Astrophysical Journal
Jianghui Ji, Lin Liu, Hiroshi Kinoshita, Guangyu Li,
... in multiple planetary systems. For example, in the HD 69830 system, we extensively explore the planetary configuration of ...
Tópico(s): Astrophysics and Star Formation Studies
2007 - Cambridge University Press | Proceedings of the International Astronomical Union
M. C. Wyatt, Rowan J. Smith, J. S. Greaves, Charles Beichman, G. Bryden, C. M. Lisse,
... has three Neptune mass planets at <1 AU (HD 69830); all exhibit strong mid-IR silicate features. We ...
Tópico(s): Astrophysics and Star Formation Studies
2007 - IOP Publishing | The Astrophysical Journal
C. Lovis, M. Mayor, F. Pepe, Y. Alibert, W. Benz, F. Bouchy, A. C. M. Correia, J. Laskar, C. Mordasini, D. Queloz, N. C. Santos, S. Udry, Jean‐Loup Bertaux, J. P. Sivan,
... 6 and 197 days, orbiting the nearby star HD 69830. This star was already known to show an ...
Tópico(s): Astrophysics and Star Formation Studies
2006 - Nature Portfolio | Nature
C. H. Chen, B. M. Patten, M. W. Werner, C. D. Dowell, Karl R. Stapelfeldt, Inseok Song, J. R. Stauffer, Myra Blaylock, Karl D. Gordon, Vanessa Krause,
... features, as observed toward the Hale-Bopp star HD 69830.
Tópico(s): Astro and Planetary Science
2005 - IOP Publishing | The Astrophysical Journal
U. Marboeuf, Amy Bonsor, J.‐C. Augereau,
... the examples of the Solar System, Vega and HD 69830, we show that dust grains released from sublimating ...
Tópico(s): Astrophysics and Star Formation Studies
2016 - Elsevier BV | Planetary and Space Science