Results 51 to 60 of about 70,807 (355)
, 2018 We present a study of the CO isotopologues and the high-density tracers H$_{2}$CO, HCO$^{+}$, and CS in Class 0/I proto-brown dwarfs (proto-BDs). We have used the IRAM 30m telescope to observe the $^{12}$CO (2-1), $^{13}$CO (2-1), C$^{18}$O (2-1), C$^{17}
Caselli, P., Riaz, B., Thi, W. F.
core +1 more source
The large-scale disk fraction of brown dwarfs in the Taurus cloud as measured with Spitzer [PDF]
, 2010 Aims. The brown dwarf (BD) formation process has not yet been completely understood. To shed more light on the differences and similarities between star and BD formation processes, we study and compare the disk fraction among both kinds of objects over a
A. Noriega-Crespo +51 more
core +4 more sources
Extracting γfrom Bd(t) -> D(*)+ D(*)- and Bd -> Ds(*)+ D(*)- Decays [PDF]
Phys.Lett. B584 (2004) 81-88, 2003 We show that the CP phase \gamma can be obtained from measurements of Bd(t) -> D(*)+ D(*)- and Bd -> Ds(*)+ D(*)-. These decays are related by flavor SU(3) in the limit where spectator-quark contributions are small. If the pseudoscalar-pseudoscalar decays Bd(t) -> D+ D- and Bd -> Ds+ D- are used, the leading-order SU(3)-breaking effect is f_Ds/f_D. The
arxiv +1 more source
Iterated amplitudes in the high-energy limit [PDF]
, 2008 We consider the high-energy limits of the colour ordered four-, five- and six-gluon MHV amplitudes of the maximally supersymmetric QCD in the multi-Regge kinematics where all the gluons are strongly ordered in rapidity.
A. Brandhuber +17 more
core +2 more sources
Relation between Brown Dwarfs and Exoplanets [PDF]
, 2016 One of the most debated subjects in Astronomy since the discovery of exoplanets is how can we distinguish the most massive of such objects from very-low mass stars like Brown Dwarfs (BDs)?
Caretta, César A. +4 more
core +3 more sources
Accuracy Evaluation of Broadcast Ephemeris for BDS-2 and BDS-3 [PDF]
, 2021 Abstract The BDS-3 system was completed in July 2020 and began to provide services to users around the world. The inspection of its operation, especially the detailed evaluation of the orbit, clock error, TGD and other indicators, plays an important role in the subsequent positioning.
Hao Jun Jian, Yishi Wang, Shoujian Zhang
openaire +2 more sources
Proper isometric actions of hyperbolic groups on $L^p$-spaces [PDF]
Compositio Math. 149 (2013) 773-792, 2012 We show that every non-elementary hyperbolic group $\G$ admits a proper affine isometric action on $L^p(\bd\G\times \bd\G)$, where $\bd\G$ denotes the boundary of $\G$ and $p$ is large enough. Our construction involves a $\G$-invariant measure on $\bd\G\times \bd\G$ analogous to the Bowen - Margulis measure from the CAT$(-1)$ setting, as well as a ...
arxiv +1 more source
Chemical tracers in proto-brown dwarfs: CN, HCN, and HNC observations
, 2018 We present results from a study of nitrogen chemistry in Class 0/I proto-brown dwarfs (proto-BDs). We have used the IRAM 30 m telescope to observe the CN (2-1), HCN (3-2), and HNC (3-2) lines in 7 proto-BDs.
Caselli, P., Riaz, B., Thi, W. -F.
core +1 more source
Identification of BDS Registers [PDF]
MATEC Web of Conferences, 2018 The SSR Mode S technology is currently one of the major means of surveillance in ATM. Addressed surveillance enables the elicitation of replies from Mode S transponder on board of an aircraft containing different flight information in the so-called BDS registers.
Stanislav Pleninger, Tereza Topkova
openaire +3 more sources