Re: Cosmological Red Shift

On Monday, January 8, 2018 at 1:31:15 PM UTC-7, agrays...@gmail.com wrote: > > > > On Friday, December 8, 2017 at 8:04:42 AM UTC-7, agrays...@gmail.com > wrote: >> >> How is it distinguished from red and possibly blue shifting due to >> relative motion of distant galaxies? TIA, AG >> > > I

Re: Cosmological Red Shift

On Friday, December 8, 2017 at 8:04:42 AM UTC-7, agrays...@gmail.com wrote: > > How is it distinguished from red and possibly blue shifting due to > relative motion of distant galaxies? TIA, AG > I noticed, IIRC, that the Hubble constant as measured by the Planck probe, is around 67

Re: Cosmological Red Shift

On Sunday, December 31, 2017 at 8:10:39 PM UTC-6, agrays...@gmail.com wrote: > > > > On Sunday, December 31, 2017 at 7:25:53 AM UTC-7, Lawrence Crowell wrote: >> >> On Saturday, December 30, 2017 at 8:33:17 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Saturday, December 30, 2017 at

Re: Cosmological Red Shift

On Sunday, December 31, 2017 at 7:25:53 AM UTC-7, Lawrence Crowell wrote: > > On Saturday, December 30, 2017 at 8:33:17 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Saturday, December 30, 2017 at 2:40:22 PM UTC-7, Lawrence Crowell >> wrote: >>> >>> On Saturday, December 30, 2017 at

Re: Cosmological Red Shift

On Saturday, December 30, 2017 at 8:33:17 PM UTC-6, agrays...@gmail.com wrote: > > > > On Saturday, December 30, 2017 at 2:40:22 PM UTC-7, Lawrence Crowell wrote: >> >> On Saturday, December 30, 2017 at 2:28:52 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Saturday, December 30,

Re: Cosmological Red Shift

On Saturday, December 30, 2017 at 2:40:22 PM UTC-7, Lawrence Crowell wrote: > > On Saturday, December 30, 2017 at 2:28:52 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Saturday, December 30, 2017 at 1:03:58 PM UTC-7, Lawrence Crowell >> wrote: >>> >>> On Friday, December 29, 2017 at

Re: Cosmological Red Shift

On Saturday, December 30, 2017 at 2:28:52 PM UTC-6, agrays...@gmail.com wrote: > > > > On Saturday, December 30, 2017 at 1:03:58 PM UTC-7, Lawrence Crowell wrote: >> >> On Friday, December 29, 2017 at 8:45:41 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Friday, December 29, 2017 at

Re: Cosmological Red Shift

On Saturday, December 30, 2017 at 1:03:58 PM UTC-7, Lawrence Crowell wrote: > > On Friday, December 29, 2017 at 8:45:41 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Friday, December 29, 2017 at 6:59:22 AM UTC-7, Lawrence Crowell wrote: >>> >>> The cosmological constant is Λ ~

Re: Cosmological Red Shift

On Friday, December 29, 2017 at 8:45:41 PM UTC-6, agrays...@gmail.com wrote: > > > > On Friday, December 29, 2017 at 6:59:22 AM UTC-7, Lawrence Crowell wrote: >> >> The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale factor >> evolves as >> >> a(t) = a_0 exp(t sqrt{Λc^2/3}). >> >> The

Re: Cosmological Red Shift

On 12/29/2017 9:26 PM, agrayson2...@gmail.com wrote: On Friday, December 29, 2017 at 7:45:41 PM UTC-7, agrays...@gmail.com wrote: On Friday, December 29, 2017 at 6:59:22 AM UTC-7, Lawrence Crowell wrote: The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale

Re: Cosmological Red Shift

On Friday, December 29, 2017 at 7:45:41 PM UTC-7, agrays...@gmail.com wrote: > > > > On Friday, December 29, 2017 at 6:59:22 AM UTC-7, Lawrence Crowell wrote: >> >> The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale factor >> evolves as >> >> a(t) = a_0 exp(t sqrt{Λc^2/3}). >> >>

Re: Cosmological Red Shift

On Friday, December 29, 2017 at 6:59:22 AM UTC-7, Lawrence Crowell wrote: > > The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale factor > evolves as > > a(t) = a_0 exp(t sqrt{Λc^2/3}). > > The factor sqrt{Λc^2/3} ~ 10^{-18}sec^{-1}. For a billion years this is t > ~ 3x10^{16} sec

Re: Cosmological Red Shift

I meant to write The cosmological constant is Λ ~ 10^{-52}m^{-2}. LC On Friday, December 29, 2017 at 7:59:22 AM UTC-6, Lawrence Crowell wrote: > > The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale factor > evolves as > > a(t) = a_0 exp(t sqrt{Λc^2/3}). > > The factor sqrt{Λc^2/3}

Re: Cosmological Red Shift

The cosmological constant is Λ ~ 10^{-52}cm^{-2} and the scale factor evolves as a(t) = a_0 exp(t sqrt{Λc^2/3}). The factor sqrt{Λc^2/3} ~ 10^{-18}sec^{-1}. For a billion years this is t ~ 3x10^{16} sec and so sqrt{Λc^2/3}t ~ .03 and the scale factor increases by 1.03. The CMB microwave

Re: Cosmological Red Shift

On Wed, Dec 27, 2017 at 3:17 PM, wrote: ​> ​ > Since galaxies were formed after the CMB came into existence about 380,000 > years after the BB, and those far away will wink out as they cross the > cosmic horizon, why doesn't the CMB also wink out? > ​ The CMB will wink

Re: Cosmological Red Shift

On Thursday, December 28, 2017 at 2:00:43 AM UTC-6, agrays...@gmail.com wrote: > > > > On Wednesday, December 27, 2017 at 6:37:16 PM UTC-7, Brent wrote: >> >> >> >> On 12/27/2017 5:21 PM, agrays...@gmail.com wrote: >> >> >> >> On Wednesday, December 27, 2017 at 3:43:05 PM UTC-7, Lawrence

Re: Cosmological Red Shift

On Wednesday, December 27, 2017 at 6:37:16 PM UTC-7, Brent wrote: > > > > On 12/27/2017 5:21 PM, agrays...@gmail.com wrote: > > > > On Wednesday, December 27, 2017 at 3:43:05 PM UTC-7, Lawrence Crowell > wrote: >> >> The CMB is composed of radiation with a black body distribution peaked at

Re: Cosmological Red Shift

On 12/27/2017 5:21 PM, agrayson2...@gmail.com wrote: On Wednesday, December 27, 2017 at 3:43:05 PM UTC-7, Lawrence Crowell wrote: The CMB is composed of radiation with a black body distribution peaked at around 1000nm. The radiation is now in the microwave band at about 1 mm

Re: Cosmological Red Shift

On Wednesday, December 27, 2017 at 3:43:05 PM UTC-7, Lawrence Crowell wrote: > > The CMB is composed of radiation with a black body distribution peaked at > around 1000nm. The radiation is now in the microwave band at about 1 mm > wavelength. The IR photons were spread by the expansion of

Re: Cosmological Red Shift

The CMB is composed of radiation with a black body distribution peaked at around 1000nm. The radiation is now in the microwave band at about 1 mm wavelength. The IR photons were spread by the expansion of spacetime by a factor of 1000, and the actual z factor for the CMB is z = 1100. With the

Re: Cosmological Red Shift

On 12/27/2017 1:22 PM, agrayson2...@gmail.com wrote: On Wednesday, December 27, 2017 at 8:57:46 PM UTC, Brent wrote: Even as the universe expands there will still be a part of it which was close enough to us (in the distant past) that it is still within our visible universe.

Re: Cosmological Red Shift

The CMB originated everywhere-- including where you are standing right now! Bruce On 28/12/2017 8:22 am, agrayson2...@gmail.com wrote: On Wednesday, December 27, 2017 at 8:57:46 PM UTC, Brent wrote: Even as the universe expands there will still be a part of it which was close enough

Re: Cosmological Red Shift

On Wednesday, December 27, 2017 at 8:57:46 PM UTC, Brent wrote: > > Even as the universe expands there will still be a part of it which was > close enough to us (in the distant past) that it is still within our > visible universe. > > Brent > CMIIAW, but our galaxy formed a long time AFTER

Re: Cosmological Red Shift

Even as the universe expands there will still be a part of it which was close enough to us (in the distant past) that it is still within our visible universe. Brent On 12/27/2017 12:17 PM, agrayson2...@gmail.com wrote: Since galaxies were formed after the CMB came into existence about

Re: Cosmological Red Shift

Since galaxies were formed after the CMB came into existence about 380,000 years after the BB, and those far away will wink out as they cross the cosmic horizon, why doesn't the CMB also wink out? I know the latter is reddening as the cosmos expands, and is ubiquitous, but when the question

Re: Cosmological Red Shift

>>>>>> >>>>>> On Saturday, December 9, 2017 at 2:17:38 PM UTC, Lawrence Crowell >>>>>> wrote: >>>>>>> >>>>>>> On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, >>>>>>> agrays...@gmail.com w

Re: Cosmological Red Shift

UTC-6, agrays...@gmail.com >>>> wrote: >>>>> >>>>> >>>>> >>>>> On Saturday, December 9, 2017 at 2:17:38 PM UTC, Lawrence Crowell >>>>> wrote: >>>>>> >>>>>> On Saturday,

Re: Cosmological Red Shift

t 2:17:38 PM UTC, Lawrence Crowell >>>> wrote: >>>>> >>>>> On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, agrays...@gmail.com >>>>> wrote: >>>>>> >>>>>> >>>>>> I think you're m

Re: Cosmological Red Shift

that the measured shift in H is not effected by the cosmological red shift which presumably shifts all wave lengths. AG Of course it shifts all wavelengths by the same factor. So the spectrum of atoms

Re: Cosmological Red Shift

;>> >>> >>> >>> On Saturday, December 9, 2017 at 2:17:38 PM UTC, Lawrence Crowell wrote: >>>> >>>> On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, agrays...@gmail.com >>>> wrote: >>>>> >>>>> >&

Re: Cosmological Red Shift

gt; >>> On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, agrays...@gmail.com >>> wrote: >>>> >>>> >>>> I think you're making the unwarranted assumption that the measured >>>> shift in H is not >>>> effected by t

Re: Cosmological Red Shift

t;> >>> I think you're making the unwarranted assumption that the measured shift >>> in H is not >>> effected by the cosmological red shift which presumably shifts all wave >>> lengths. AG >>> >> >> Of course it shifts all wavelengths b

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 2:17:38 PM UTC, Lawrence Crowell wrote: > > On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, agrays...@gmail.com > wrote: >> >> >> I think you're making the unwarranted assumption that the measured shift >> in H is not &g

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 9:22:35 PM UTC, Lawrence Crowell wrote: > > On Saturday, December 9, 2017 at 2:38:49 PM UTC-6, Brent wrote: >> >> >> >> On 12/9/2017 10:38 AM, agrays...@gmail.com wrote: >> > But you don't know which part of the shift of the H is due to >> > cosmological

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 2:38:49 PM UTC-6, Brent wrote: > > > > On 12/9/2017 10:38 AM, agrays...@gmail.com wrote: > > But you don't know which part of the shift of the H is due to > > cosmological expansion, so that's why the method I described seems > > necessary. You must estimate

Re: Cosmological Red Shift

On 12/9/2017 10:38 AM, agrayson2...@gmail.com wrote: But you don't know which part of the shift of the H is due to cosmological expansion, so that's why the method I described seems necessary. You must estimate how much is due to expansion alone via distance knowledge and Hubble's law, and

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 2:08:05 PM UTC, Russell Standish wrote: > > On Sat, Dec 09, 2017 at 05:34:29AM -0800, agrays...@gmail.com > wrote: > > > > I think you're making the unwarranted assumption that the measured shift > in > > H is not > > ef

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 7:34:29 AM UTC-6, agrays...@gmail.com wrote: > > > I think you're making the unwarranted assumption that the measured shift > in H is not > effected by the cosmological red shift which presumably shifts all wave > lengths. AG > Of

Re: Cosmological Red Shift

On Sat, Dec 09, 2017 at 05:34:29AM -0800, agrayson2...@gmail.com wrote: > > I think you're making the unwarranted assumption that the measured shift in > H is not > effected by the cosmological red shift which presumably shifts all wave > lengths. AG Yes - all spectral li

Re: Cosmological Red Shift

that if one > > > measures the red shift and knows the distance, one then apply estimate > the > > > departure of s ;awred shift from what Hubble's law implies, one can > > > estimate the Doppler shift. AG > > > > > > > > > > > > &

Re: Cosmological Red Shift

stating is that if one > > measures the red shift and knows the distance, one then apply estimate the > > departure of s ;awred shift from what Hubble's law implies, one can > > estimate the Doppler shift. AG > > > > > > > *Ignore above statement; acci

Re: Cosmological Red Shift

On the stackexchange I presented FLRW cosmology. The important equation is (a'/a)^2 = 4πGρ/3 for a' = da/dt. The parameter a is a scale factor and

Re: Cosmological Red Shift

ore above statement; accidentally posted.I think what you're implying but not expressly stating is that if one MEASURES the TOTAL red shift and knows the distance, one can use the known distance and Hubble's law to calculate what the Cosmological red shift SHOULD be, and from that calculation and

Re: Cosmological Red Shift

On Saturday, December 9, 2017 at 2:40:12 AM UTC, Russell Standish wrote: > > On Fri, Dec 08, 2017 at 12:59:16PM -0800, agrays...@gmail.com > wrote: > > > > > > On Friday, December 8, 2017 at 3:04:42 PM UTC, agrays...@gmail.com > wrote: > > > > > > How is it distinguished from red and

Re: Cosmological Red Shift

On Fri, Dec 08, 2017 at 12:59:16PM -0800, agrayson2...@gmail.com wrote: > > > On Friday, December 8, 2017 at 3:04:42 PM UTC, agrays...@gmail.com wrote: > > > > How is it distinguished from red and possibly blue shifting due to > > relative motion of distant galaxies? TIA, AG > > > > I meant to

Re: Cosmological Red Shift

On Friday, December 8, 2017 at 3:04:42 PM UTC, agrays...@gmail.com wrote: > > How is it distinguished from red and possibly blue shifting due to > relative motion of distant galaxies? TIA, AG > I meant to ask how one distinguishes the Doppler shift (red or blue) from the Cosmological shift

Cosmological Red Shift

How is it distinguished from red and possibly blue shifting due to relative motion of distant galaxies? TIA, AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email