Results 71 to 80 of about 3,349 (181)

The quest for Magrathea planets

Astronomy & Astrophysics
Context. Planetary formation might occur at different stages of the stellar evolution. In particular, theoretical studies have been focusing on addressing whether formation can occur around compact binaries that evolved beyond the main sequence ...
Nigioni Arianna, Turrini Diego, Danielski Camilla, Polychroni Danae, Chambers John E.   +4 more
doaj   +1 more source

Kozai-Lidov cycles towards the limit of circumbinary planets

, 2015
In this paper we answer a simple question: can a misaligned circumbinary planet induce Kozai-Lidov cycles on an inner stellar binary? We use known analytic equations to analyse the behaviour of the Kozai-Lidov effect as the outer mass is made small.
Martin, David V., Triaud, Amaury H. M. J.   +1 more
core   +1 more source

Probing the presence of planets in transition discs' cavities via warps: the case of TW Hya [PDF]

, 2014
We are entering the era in which observations of protoplanetary discs properties can indirectly probe the presence of massive planets or low mass stellar companions interacting with the disc.
Facchini, Stefano, Lodato, Giuseppe, Ricci, Luca   +2 more
core   +3 more sources

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

Circumbinary Planet Formation in the Kepler-16 system. I. N-body Simulations

, 2012
The recently discovered circumbinary planets (Kepler-16 b, Kepler-34 b, Kepler-35 b) represent the first direct evidence of the viability of planet formation in circumbinary orbits.
Holman, Ida, Marzari, Marzari, Meschiari, Moriwaki, Slawson, Stefano Meschiari, Stewart, Weidenschilling, Winn, Xie, Xie   +12 more
core   +1 more source

Migration of planets in circumbinary discs [PDF]

Astronomy & Astrophysics, 2018
Aims. The discovery of planets in close orbits around binary stars raises questions about their formation. It is believed that these planets formed in the outer regions of the disc and then migrated through planet-disc interaction to their current location.
Thun, Daniel, Kley, Wilhelm
openaire   +2 more sources

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

A new approach for probing circumbinary disks

, 2009
Circumbinary disks are considered to exist in a wide variety of astrophysical objects, e.g., young binary stars, protoplanetary systems, and massive binary black hole systems in active galactic nuclei (AGNs).
Atsuo T. Okazaki, Bate, Bogdanović, Dotti, Duquennoy, Dutrey, Duvert, Ferrarese, Gebhardt, Goldreich, Hayasaki, Hayasaki, Hayasaki, Kato, Kimitake Hayasaki, MacFadyen, Magorrian, Murray, Osaki, Vogt   +19 more
core   +1 more source

The Nature of Transition Circumstellar Disks II. Southern Molecular Clouds [PDF]

, 2012
Transition disk objects are pre-main-sequence stars with little or no near-IR excess and significant far-IR excess, implying inner opacity holes in their disks. Here we present a multifrequency study of transition disk candidates located in Lupus I, III,
Allen, Lori E., Castelli, Analía V. Smith, Cieza, Lucas A., Merín, Bruno, Morrell, Nidia, Rebassa-Mansergas, Alberto, Romero, Gisela A., Schreiber, Matthias R.   +7 more
core   +2 more sources

Empirical Stability Criteria for 3D Hierarchical Triple Systems. I. Circumbinary Planets

The Astronomical Journal
In this work we revisit the problem of the dynamical stability of hierarchical triple systems with applications to circumbinary planetary orbits. We derive critical semimajor axes based on simulating and analyzing the dynamical behavior of 3 × 10 ^8 ...
Nikolaos Georgakarakos, Siegfried Eggl, Mohamad Ali-Dib, Ian Dobbs-Dixon   +3 more
doaj   +1 more source