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叶绿素a和叶绿素b（Chla和Chlb）在光能吸收和传递过程中发挥重要作用。长期高温下，植物的叶绿素含量和成分均发生改变，但尚不清楚叶绿素降解仅是高温下的被动响应，还是植物响应高温并调控自身适应性的机制之一。
We report the discovery of a prominent non-thermal X-ray feature located near the Galactic centre that we identify as an energetic pulsar wind nebula. This feature, G359.95-0.04, lies 1-lyr north of S...
Perturbed stellar motions around the rotating black hole in Sgr A* for a generic orientation of its spin axis
Perturbed stellar motions rotating black hole generic orientation spin axis
2011/10/17
Empirically determining the averaged variations of the orbital parameters of the stars orbiting the Supermassive Black Hole (SBH) hosted by the Galactic Centre (GC) in Sgr A* is, in principle, a valua...
SGR 0418+5729 is a transient Soft Gamma-ray Repeater which underwent a major outburst in June 2009, during which the emission of short bursts was observed. Its properties appeared quite typical of oth...
In 2004, SGR 1806-20 underwent a period of intense and long-lasting burst activity that included the giant flare of 27 December 2004 -- the most intense extra-solar transient event ever detected at Ea...
Perturbed stellar motions around the rotating black hole in Sgr A* for a generic orientation of its spin axis
Classical general relativity Experimental tests of gravitational theories Black holes Physics of black holes Satellite orbits
2011/8/17
Abstract: Empirically determining the averaged variations of the orbital parameters of the stars orbiting the Supermassive Black Hole (SBH) hosted by the Galactic Centre (GC) in Sgr A* is, in principl...
We present our temporal and spectral analyses of 29 bursts from SGR J0501+4516, detected with the Gamma-ray Burst Monitor onboard the Fermi Gamma-ray Space Telescope during the 13 days of the source a...
The instrumental polarization of the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO) at the VLT - Implications for time-resolved polarimetric measurements of Sgr A*
the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO)
2011/1/10
We report on the results of calibrating and simulating the instrumental polarization properties of the ESO VLT adaptive optics camera system NAOS/CONICA (NACO) in the Ks-band. We use the Stokes/Muelle...
In recent years, there has been increasing recognition of the potential of the galactic center as a probe of general relativity in the strong field. There is almost certainly a black hole at Sgr A* in...
Australia Telescope Compact Array radio continuum 1384 and 2368 MHz Observations of Sgr B
center synchrotron radiation cosmic rays molecular clouds general molecular clouds
2010/11/11
We present images of the Sagittarius (Sgr) B giant molecular cloud at 2368 and 1384 MHz obtained using new, multi-configuration Australia Telescope Compact Array (ATCA) observations. We have combined ...
Estimating the parameters of the Sgr A* black hole
Black Holes Galactic Center Gravitational Lensing Strong
2010/11/11
The measurement of relativistic effects around the galactic center may allow in the near future to strongly constrain the parameters of the supermassive black hole likely present at the galactic cente...
Mapping photodissociation and shocks in the vicinity of Sgr A*
astrochemistry – Galaxy abundances – Galaxy center – Galaxy
2010/11/16
Aims. We study the chemistry in the harsh environments of galactic nuclei using the nearest one, the Galactic center (GC).Methods. We have obtained maps of the molecular emission within the central fi...
An analysis of the blue straggler population in the Sgr dSph globular cluster Arp 2
open clusters and associations general - open clusters and associations individual (Arp 2) - binaries
2010/11/12
We present and discuss new BVI CCD photometry in the field of the globular cluster Arp 2,
which is considered a member of the Sagittarius Dwarf Spheroidal Galaxy. The main goal
of this investigation...
Massive Star Formation of the Sgr A East HII Regions Near the Galactic Center
Galaxy Astrophysics (astro-ph.GA)
2011/1/4
A group of four compact HII regions associated with the well-known 50 km/s molecular cloud is the closest site of on-going star formation to the dynamical center of the Galaxy, at a projected distance...
Occultation of the Quiescent Emission from Sgr A* by IR Flares
Galaxy Astrophysics (astro-ph.GA)
2010/12/27
We have investigated the nature of flare emission from Sgr A* during multi-wavelength observations of this source that took place in 2004, 2005 and 2006. We present evidence for dimming of submm and r...