scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. IX. The ninth year (2016–2017)

2017 ◽  
Vol 69 (5) ◽  
Author(s):  
Taichi Kato ◽  
Keisuke Isogai ◽  
Franz-Josef Hambsch ◽  
Tonny Vanmunster ◽  
Hiroshi Itoh ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

scholarly journals Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II The Second Year (2009–2010)

2010 ◽  
Vol 62 (6) ◽  
pp. 1525-1584 ◽  
Author(s):  
Taichi Kato ◽  
Hiroyuki Maehara ◽  
Makoto Uemura ◽  
Arne Henden ◽  
Enrique De Miguel ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations ◽  
Second Year

scholarly journals Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III. The Third Year (2010–2011)

2012 ◽  
Vol 64 (1) ◽  
pp. 21 ◽  
Author(s):  
Taichi Kato ◽  
Hiroyuki Maehara ◽  
Ian Miller ◽  
Tomohito Ohshima ◽  
Enrique de Miguel ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
The Third ◽  
Period Variations

scholarly journals Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV. The Fourth Year (2011–2012)

2013 ◽  
Vol 65 (1) ◽  
pp. 23 ◽  
Author(s):  
Taichi Kato ◽  
Franz-Josef Hambsch ◽  
Hiroyuki Maehara ◽  
Gianluca Masi ◽  
Ian Miller ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. VIII. The eighth year (2015–2016)

2016 ◽  
Vol 68 (4) ◽  
pp. 65 ◽  
Author(s):  
Taichi Kato ◽  
Franz-Josef Hambsch ◽  
Berto Monard ◽  
Tonny Vanmunster ◽  
Yutaka Maeda ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. VI. The sixth year (2013–2014)

2014 ◽  
Vol 66 (5) ◽  
Author(s):  
Taichi Kato ◽  
Pavol A. Dubovsky ◽  
Igor Kudzej ◽  
Franz-Josef Hambsch ◽  
Ian Miller ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations ◽  
Year 2013

scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. V. The fifth year (2012–2013)

2014 ◽  
Vol 66 (2) ◽  
pp. 30 ◽  
Author(s):  
Taichi Kato ◽  
Franz-Josef Hambsch ◽  
Hiroyuki Maehara ◽  
Gianluca Masi ◽  
Francesca Nocentini ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. X. The tenth year (2017)

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Taichi Kato ◽  
Keisuke Isogai ◽  
Yasuyuki Wakamatsu ◽  
Franz-Josef Hambsch ◽  
Hiroshi Itoh ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Recent Advances ◽  
Period Variations ◽  
Mass Ratios ◽  
Type Object

Abstract Continuing the project described by Kato et al. (2009, PASJ, 61, S395), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2017 season, and characterized these objects. WZ Sge-type stars identified in this study are PT And, ASASSN-17ei, ASASSN-17el, ASASSN-17es, ASASSN-17fn, ASASSN-17fz, ASASSN-17hw, ASASSN-17kd, ASASSN-17la, PNV J20205397$+$2508145, and TCP J00332502$-$3518565. We obtained new mass ratios for seven objects using growing superhumps (stage A). ASASSN-17gf is an EI Psc-type object below the period minimum. CRTS J080941.3$+$171528 and DDE 51 are objects in the period gap, and both showed a long-lasting phase of stage A superhumps. We also summarize the recent advances in understanding of SU UMa-type and WZ Sge-type dwarf novae.

scholarly journals Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae

2009 ◽  
Vol 61 (sp2) ◽  
pp. S395-S616 ◽  
Author(s):  
Taichi Kato ◽  
Akira Imada ◽  
Makoto Uemura ◽  
Daisaku Nogami ◽  
Hiroyuki Maehara ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

scholarly journals Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014–2015)

2015 ◽  
Vol 67 (6) ◽  
pp. 105 ◽  
Author(s):  
Taichi Kato ◽  
Franz-Josef Hambsch ◽  
Pavol A. Dubovsky ◽  
Igor Kudzej ◽  
Berto Monard ◽  
...  
Keyword(s):  
Dwarf Novae ◽  
Period Variations

On nearly-commensurable periods in the restricted problem of three bodies, with calculations of the long-period variations in the interior 2:1 case

1966 ◽  
Vol 25 ◽  
pp. 197-222 ◽  
Author(s):  
P. J. Message
Keyword(s):  
Periodic Solution ◽  
Periodic Solutions ◽  
Large Amplitude ◽  
Restricted Problem ◽  
Small Amplitude ◽  
Minor Planets ◽  
Long Period ◽  
Numerical Integrations ◽  
Period Variations ◽  
The Mean

An analytical discussion of that case of motion in the restricted problem, in which the mean motions of the infinitesimal, and smaller-massed, bodies about the larger one are nearly in the ratio of two small integers displays the existence of a series of periodic solutions which, for commensurabilities of the typep+ 1:p, includes solutions of Poincaré'sdeuxième sortewhen the commensurability is very close, and of thepremière sortewhen it is less close. A linear treatment of the long-period variations of the elements, valid for motions in which the elements remain close to a particular periodic solution of this type, shows the continuity of near-commensurable motion with other motion, and some of the properties of long-period librations of small amplitude.To extend the investigation to other types of motion near commensurability, numerical integrations of the equations for the long-period variations of the elements were carried out for the 2:1 interior case (of which the planet 108 “Hecuba” is an example) to survey those motions in which the eccentricity takes values less than 0·1. An investigation of the effect of the large amplitude perturbations near commensurability on a distribution of minor planets, which is originally uniform over mean motion, shows a “draining off” effect from the vicinity of exact commensurability of a magnitude large enough to account for the observed gap in the distribution at the 2:1 commensurability.

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