scholarly journals Polar stellar-spots and grazing planetary transits

2015 ◽  
Vol 583 ◽  
pp. L1 ◽  
Author(s):  
M. Oshagh ◽  
N. C. Santos ◽  
P. Figueira ◽  
V. Zh. Adibekyan ◽  
A. Santerne ◽  
...  
Keyword(s):  
Planetary Transits

scholarly journals The DECam minute cadence survey – II. 49 variables but no planetary transits of a white dwarf

2019 ◽  
Vol 490 (1) ◽  
pp. 1066-1075 ◽  
Author(s):  
Kyra Dame ◽  
Claudia Belardi ◽  
Mukremin Kilic ◽  
Armin Rest ◽  
A Gianninas ◽  
...  
Keyword(s):  
White Dwarf ◽  
White Dwarfs ◽  
Point Sources ◽  
Habitable Zone ◽  
Significant Evidence ◽  
Rr Lyrae ◽  
M Dwarf ◽  
Rule Out ◽  
Planetary Transits

Abstract We present minute cadence photometry of 31 732 point sources observed in one 3 $\rm deg^{2}$ DECam pointing centred at RA = 09:03:02 and Dec. = −04:35:00 over eight consecutive half-nights. We use these data to search for eclipse-like events consistent with a planetary transit of a white dwarf and other sources of stellar variability within the field. We do not find any significant evidence for minute-long transits around our targets, hence we rule out planetary transits around ∼370 white dwarfs that should be present in this field. Additionally, we identify 49 variables, including 40 new systems. These include 23 detached or contact stellar binaries, one eclipsing white dwarf + M dwarf binary, 16 δ Scuti, three RR Lyrae, and two ZZ Ceti pulsators. Results from the remaining two fields in our survey will allow us to place more stringent constraints on the frequency of planets orbiting white dwarfs in the habitable zone.

scholarly journals XMM-NEWTONOBSERVATIONS OF HD 189733 DURING PLANETARY TRANSITS

2010 ◽  
Vol 722 (2) ◽  
pp. 1216-1225 ◽  
Author(s):  
I. Pillitteri ◽  
S. J. Wolk ◽  
O. Cohen ◽  
V. Kashyap ◽  
H. Knutson ◽  
...  
Keyword(s):  
Planetary Transits

scholarly journals Observations of the transiting planet TrES-2 with the AIU Jena telescope in Großschwabhausen

2008 ◽  
Vol 4 (S253) ◽  
pp. 436-439 ◽  
Author(s):  
S. Raetz ◽  
M. Mugrauer ◽  
T. O. B. Schmidt ◽  
T. Roell ◽  
T. Eisenbeiss ◽  
...  
Keyword(s):  
High Precision ◽  
Orbital Period ◽  
Ccd Camera ◽  
Light Curves ◽  
Orbital Parameters ◽  
Transiting Planets ◽  
Photometric Monitoring ◽  
Cassegrain Telescope ◽  
Parent Star ◽  
Planetary Transits

AbstractWe have started high precision photometric monitoring observations at the AIU Jena observatory in Großschwabhausen near Jena in fall 2006. We used a 25.4cm Cassegrain telescope equipped with a CCD-camera mounted piggyback on a 90cm telescope. To test the attainable photometric precision, we observed stars with known transiting planets. We could recover all planetary transits observed by us.We observed the parent star of the transiting planet TrES-2 over a longer period in Großschwabhausen. Between March and November 2007 seven different transits and almost a complete orbital period were analyzed. Overall, in 31 nights of observation 3423 exposures (in total 57.05h of observation) of the TrES-2 parent star were taken. Here, we present our methods and the resulting light curves. Using our observations we could improve the orbital parameters of the system.

scholarly journals The Long History of the Rossiter-McLaughlin Effect and its Recent Applications

2011 ◽  
Vol 7 (S282) ◽  
pp. 379-384 ◽  
Author(s):  
Simon Albrecht
Keyword(s):  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars ◽  
History Of ◽  
Formation And Evolution ◽  
Exoplanet Systems ◽  
Planetary Transits

AbstractIn this talk I will review the Rossiter-McLaughlin (RM) effect; its history, how it manifests itself during stellar eclipses and planetary transits, and the increasingly important role its measurements play in guiding our understanding of the formation and evolution of close binary stars and exoplanet systems.

scholarly journals A survey for planetary transits in the field of NGC 7789

2005 ◽  
Vol 359 (3) ◽  
pp. 1096-1116 ◽  
Author(s):  
D. M. Bramich ◽  
Keith Horne ◽  
I. A. Bond ◽  
R. A. Street ◽  
A. Collier Cameron ◽  
...  
Keyword(s):  
Planetary Transits
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