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The Role of Gravitational Instabilities in the Feeding of Supermassive Black Holes

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
I review the recent progresses that have been obtained, especially through the use of high‐resolution numerical simulations, on the dynamics of self‐gravitating accretion discs. A coherent picture is emerging, where the disc dynamics is controlled by a small number of parameters that determine whether the disc is stable or unstable, whether the ...
Giuseppe Lodato, Francesco Shankar
wiley   +1 more source

The binary mass ratios of circumbinary planet hosts [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Almost a dozen circumbinary planets have been found transiting eclipsing binaries. For the first time the observational bias of this sample is calculated with respect to the mass ratio of the host binaries.
D. Martin
semanticscholar   +1 more source

Massive Black Hole Binaries: Dynamical Evolution and Observational Signatures

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
The study of the dynamical evolution of massive black hole pairs in mergers is crucial in the context of a hierarchical galaxy formation scenario. The timescales for the formation and the coalescence of black hole binaries are still poorly constrained, resulting in large uncertainties in the expected rate of massive black hole binaries detectable in ...
M. Dotti, A. Sesana, R. Decarli, Francesco Shankar   +3 more
wiley   +1 more source

Planets in Binaries: Formation and Dynamical Evolution

Galaxies, 2019
Binary systems are very common among field stars, yet the vast majority of known exoplanets have been detected around single stars. While this relatively small number of planets in binaries is probably partly due to strong observational biases, there is,
Francesco Marzari, Philippe Thebault
doaj   +1 more source

THE FIRST CIRCUMBINARY PLANET FOUND BY MICROLENSING: OGLE-2007-BLG-349L(AB)c [PDF]

, 2016
We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of q ≈ 3.4 × 10−4, but there is an additional signal due to an additional lens ...
D. Bennett, S. Rhie, A. Udalski, A. Gould, Y. Tsapras, D. Kubas, I. Bond, J. Greenhill, A. Cassan, N. Rattenbury, T. Boyajian, J. Luhn, M. Penny, J. Anderson, F. Abe, A. Bhattacharya, C. Botzler, M. Donachie, M. Freeman, A. Fukui, Y. Hirao, Y. Itow, N. Koshimoto, M. Li, C. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, K. Ohnishi, H. Oyokawa, Y. Perrott, T. Saito, A. Sharan, D. Sullivan, T. Sumi, D. Suzuki, P. Tristram, A. Yonehara, P. Yock, M. Szymański, I. Soszyński, K. Ulaczyk, Ł. Wyrzykowski, W. Allen, D. DePoy, A. Gal-yam, B. Gaudi, C. Han, I. A. G. Monard, E. Ofek, R. Pogge, R. Street, D. Bramich, M. Dominik, K. Horne, C. Snodgrass, I. Steele, M. Albrow, É. Bachelet, V. Batista, J. Beaulieu, S. Brillant, J. Caldwell, A. Cole, C. Coutures, S. Dieters, D. Prester, J. Donatowicz, P. Fouqué, M. Hundertmark, U. Jørgensen, N. Kains, S. Kane, J. Marquette, J. Menzies, K. Pollard, C. Ranc, K. Sahu, J. Wambsganss, A. Williams, M. Zub   +81 more
semanticscholar   +1 more source

Is There a Circumbinary Planet around NSVS 14256825? [PDF]

, 2017
The cyclic behavior of (O–C) residuals of eclipse timings in the sdB+M eclipsing binary NSVS 14256825 was previously attributed to one or two Jovian-type circumbinary planets.
I. Nasiroglu, K. Goździewski, A. Słowikowska, K. Krzeszowski, M. Zejmo, S. Zoła, H. Er, W. Ogłoza, M. Dróżdż, D. Kozieł-Wierzbowska, B. Debski, N. Karaman   +11 more
semanticscholar   +1 more source

Indication of a massive circumbinary planet orbiting the low-mass X-ray binary MXB 1658−298 [PDF]

, 2017
We present an X-ray timing analysis of the transient X-ray binary MXB 1658-298, using data obtained from the RXTE and XMM-Newton observatories. We have made 27 new mid eclipse time measurements from observations made during the two outbursts of the ...
C. Jain, B. Paul, Rahul Sharma, Abdul-Kareem Jaleel, Anjan Dutta   +4 more
semanticscholar   +1 more source

New Pulse Timing Measurements of the sdBV Star CS 1246

Open Astronomy, 2017
CS 1246 is a hot subdwarf B star discovered in 2009 to exhibit a single, large-amplitude radial pulsation. An O-C diagram constructed from this mode revealed reflex motion due to the presence of a low-mass M dwarf, as well as a long-term trend consistent
Hutchens Zackary L., Barlow Brad N., Soto Alan Vasquez, Reichart Dan E., Haislip Josh B., Kouprianov Vladimir V., Linder Tyler R., Moore Justin P.   +7 more
doaj   +1 more source

The role of disc self-gravity in circumbinary planet systems – I. Disc structure and evolution [PDF]

, 2016
Supported by QMUL Research-IT and funded by EPSRC grant EP/K000128/1; and the DiRAC Complexity system, operated by the University of Leicester IT Services, which forms part of the STFC DiRAC HPC Facility (www.dirac.ac.uk). This equipment is funded by BIS
M. Mutter, A. Pierens, R. Nelson
semanticscholar   +1 more source

Early Planet Formation in Embedded Disks (eDisk). XIII. Aligned Disks with Nonsettled Dust around the Newly Resolved Class 0 Protobinary R CrA IRAS 32

The Astrophysical Journal
Young protostellar binary systems, with expected ages less than ∼10 ^5 yr, are little modified since birth, providing key clues to binary formation and evolution. We present a first look at the young, Class 0 binary protostellar system R CrA IRAS 32 from
Frankie J. Encalada, Leslie W. Looney, Shigehisa Takakuwa, John J. Tobin, Nagayoshi Ohashi, Jes K. Jørgensen, Zhi-Yun Li, Yuri Aikawa, Yusuke Aso, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Zhe-Yu Daniel Lin, Alejandro Santamaría-Miranda, Itziar de Gregorio-Monsalvo, Nguyen Thi Phuong, Adele Plunkett, Jinshi Sai (Insa Choi), Rajeeb Sharma, Hsi-Wei Yen, Ilseung Han   +21 more
doaj   +1 more source