“Por que sou tão apegada a você?”
Minha psicóloga mandou encontrar uma resposta a essa pergunta a você.
“Você tem dependência à amigos, família ou só relacionamento?”
A psiquiatra me questionou na primeira consulta e aí que parei para pensar, eu nunca fui dependente emocional de algum amigo ou familiar. Apenas duas pessoas em meus relacionamentos.
Duas pessoas em específico.
A mulher que me…
Search reveals eight new sources of black hole echoes
new study, the team developed search algorithm to comb through data taken by NASA’s Neutron star Interior Composition Explorer, or NICER, a high-time-resolution X-ray telescope aboard the International Space Station. The algorithm picked out 26 black hole X-ray binary systems that were previously known to emit X-ray outbursts. Of these 26, the team found that 10 systems were close and bright enough that they could discern X-ray echoes amid the outbursts. Eight of the 10 were previously not known to emit echoes.
“We see new signatures of reverberation in eight sources,” Wang says. “The black holes range in mass from five to 15 times the mass of the sun, and they’re all in binary systems with normal, low-mass, sun-like stars.”
As a side project, Kara is working with MIT education and music scholars, Kyle Keane and Ian Condry, to convert the emission from a typical X-ray echo into audible sound waves. Take a listen to the sound of a black hole echo here:
The researchers then ran the algorithm on the 10 black hole binaries and divided the data into groups with similar “spectral timing features,” that is, similar delays between high-energy X-rays and reprocessed echoes. This helped to quickly track the change in X-ray echoes at every stage during a black hole’s outburst.
The team identified a common evolution across all systems. In the initial “hard” state, in which a corona and jet of high-energy particles dominates the black hole’s energy, they detected time lags that were short and fast, on the order of milliseconds. This hard state lasts for several weeks. Then, a transition occurs over several days, in which the corona and jet sputter and die out, and a soft state takes over, dominated by lower-energy X-rays from the black hole’s accretion disk.
During this hard-to-soft transition state, the team discovered that time lags grew momentarily longer in all 10 systems, implying the distance between the corona and disk also grew larger. One explanation is that the corona may briefly expand outward and upward, in a last high-energy burst before the black hole finishes the bulk of its stellar meal and goes quiet.
“We’re at the beginnings of being able to use these light echoes to reconstruct the environments closest to the black hole,” Kara says. “Now we’ve shown these echoes are commonly observed, and we’re able to probe connections between a black hole’s disk, jet, and corona in a new way.”
Yuzuki's first photobook is shot in Akita, northeast Japan. It's her first time to a snowy region ever[1]. You get to see her innocence playing in the snow, as well as in a nostalgic classroom, swimming pool, with Akita's signature dish Kiritanpo[2] and many different scenarios.
For the Tokyo section, Yuzuki visited Amazing Coffe[3] and went bowling, with a theme of her day-off.
Yuzuki's Comment
I will release my first photobook, Yuzuki.
I never thought I would have my own photobook, I was very surprised and very happy about the project.
We went to Akita for this book. This is my first time visiting the northeast. Seeing the scenic snow, I was excited all throughout the shoot.
In the Tokyo part, I think you an learn more about who I am in private.
I'd love for this photobook to be my name card. Please enjoy it.
[1] Yuzuki is from Kumamoto, southern Japan, with average <4cm snowfall.
[2] Meshed rice tube skewer/hotpot
[3] LDH's own cafe brand. Tokyo hasa store in Meguro and Haneda Airport, and a branch in Osaka.