منابع مشابه
The HARPS search for southern extra-solar planets
We present here the discovery and characterisation of a very light planet around HD 4308. The planet orbits its star in 15.56 days. The circular radial-velocity variation presents a tiny semi-amplitude of 4.1 ms−1 that corresponds to a planetary minimum mass m2 sin i= 14.1 M⊕ (Earth masses). The planet was unveiled by high-precision radial-velocity measurements obtained with the HARPS spectrogr...
متن کاملDetection with HARPS velocimetry and transit search with Spitzer photometry
We report on the detection of GJ 3634b, a super-Earth of mass m sin i = 7.0 −0.8 M⊕ and period P = 2.64561 ± 0.00066 day. Its host star is a M2.5 dwarf, has a mass of 0.45 ± 0.05 M , a radius of 0.43 ± 0.03 R and lies 19.8 ± 0.6 pc away from our Sun. The planet is detected after a radial-velocity campaign using the ESO/Harps spectrograph. GJ 3634b had an a priori geometric probability to underg...
متن کاملThe HARPS survey for southern extra-solar planets
In this letter we present the discovery of a very light planetary companion to the star μAra (HD 160691). The planet orbits its host once every 9.5 days, and induces a sinusoidal radial velocity signal with a semi-amplitude of 4.1 m s, the smallest Doppler amplitude detected so far. These values imply a mass of m2 sin i=14 M⊕ (earth-masses). This detection represents the discovery of a planet w...
متن کاملI-HARPS: An Efficient Key Pre-distribution Scheme
We introduce an efficient random key pre-distribution scheme (RKPS) whose performance is 2 to 3 orders of magnitude better than schemes of comparable complexity in the literature. This dramatic improvement is achieved by increasing insecure storage complexity (for example using external flash memory). The proposed scheme is a combination of the Kerberos-like key distribution scheme (KDS) propos...
متن کاملThe Spitzer search for the transits of HARPS low-mass planets*
Radial velocity, microlensing and transit surveys have revealed the existence of a large population of low-mass planets in our Galaxy, the so-called ‘Super-Earths’ and ‘Neptunes’. The understanding of these objects would greatly benefit from the detection of a few of them transiting bright nearby stars, making possible their thorough characterization with high signalto-noise follow-up measureme...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201219017