Thanks to data obtained by Webb, astronomers have confirmed that MACS0647-star-1 is the second farthest star observed to date.
As Furtak told Universe Today via email, this represented a major accomplishment, as lensed studies traditionally focus on high-redshift galaxies:
“However, the gravitational lensing effect, where massive objects such as galaxy clusters deflect the light from background sources and magnify it, can change this if a single star in a lensed background galaxy happens to cross the so-called critical line which is a region where the gravitational magnification reaches extreme values. If the alignment is right, this then enables us to observe single stars in distant galaxies.
The gravity of this massive cluster produces a powerful lens that has already been used to identify the triple-lensed JD galaxy, which has a redshift value of=11. This corresponds to an apparent distance of 13.4 billion light-years ago, which means it appears today as it did when the Universe was less than 500 million years old. Using this same lensing galaxy, the team obtained spectra from an individual star at=4.76 – at an apparent distance of about 12.
“While the photometric measurement from the imaging was consistent with a single B-type supergiant star, [but] with the spectrum we now see, we must be either looking at two stars – one B-type and one colder F-type – or at a hot B-type star whose light is reddened by dust somewhere along the line of sight. The latter explanation is the more probable one, though. That being said, with the current spectrum – i.e., 1.
Deutschland Neuesten Nachrichten, Deutschland Schlagzeilen
Similar News:Sie können auch ähnliche Nachrichten wie diese lesen, die wir aus anderen Nachrichtenquellen gesammelt haben.
Neurosurgeon investigating patient's mystery symptoms plucks a worm from woman's brain in AustraliaA neurosurgeon investigating a woman’s mystery symptoms in an Australian hospital has plucked an 8-centimeter (3-inch) wriggling worm from the patient’s brain
Weiterlesen »
Neurosurgeon investigating patient's mystery symptoms plucks a worm from woman's brain in AustraliaA neurosurgeon investigating a woman’s mystery symptoms in an Australian hospital has plucked an 8-centimeter (3-inch) wriggling worm from the patient’s brain.
Weiterlesen »
Neurosurgeon investigating patient's mystery symptoms plucks a worm from woman's brain in AustraliaA neurosurgeon investigating a woman’s mystery symptoms in an Australian hospital has plucked an 8-centimeter (3-inch) wriggling worm from the patient’s brain
Weiterlesen »
Neurosurgeon investigating patient’s mystery symptoms plucks a worm from woman’s brain in AustraliaA neurosurgeon investigating a woman’s mystery symptoms in an Australian hospital says she plucked a wriggling worm from the patient’s brain.
Weiterlesen »
Neurosurgeon probing patient’s mystery symptoms plucks worm from woman’s brain in Australia“I just thought: ‘What is that? It doesn’t make any sense. But it’s alive and moving,’' the surgeon told a local news outlet.
Weiterlesen »
Neurosurgeon investigating patient's mystery symptoms plucks a worm from woman's brain in AustraliaA neurosurgeon investigating a woman’s mystery symptoms in an Australian hospital has plucked an 8-centimeter (3-inch) wriggling worm from the patient’s brain.
Weiterlesen »