User youpilat13

18 votes

1 answer

1k views

Exoplanet dip in transit light curve when the planet passes behind the star

asked Feb 10, 2021 at 19:51

6 votes

0 answers

219 views

Get the expression of probed volume between 2 redshifts

astrophysics cosmology redshift space-geometry

asked Jul 23, 2020 at 17:04

5 votes

1 answer

143 views

Interpretation and understanding of the relation for the photometric redshift in a given bin

galaxy redshift photometry galaxy-cluster density

asked Mar 23, 2020 at 17:39

5 votes

1 answer

179 views

Understanding better the factors on $C_l$ in Angular power spectrum and Relation with Matter power spectrum

cosmology spectra cosmological-inflation cosmic-microwave-background

asked Apr 14, 2021 at 17:20

4 votes

0 answers

90 views

Cosmology : Formula for the bias of galaxies

galaxy astrophysics cosmology dark-matter density

asked Jul 6, 2019 at 23:16

4 votes

0 answers

47 views

Cross-correlations between Lagrange and Fourier synthesis

cosmology galaxy-cluster angular-diameter radial-velocity weak-lensing

asked Oct 17, 2020 at 13:23

3 votes

1 answer

109 views

Expresion of comoving distance

cosmology distances cosmological-horizon

asked Jul 3, 2020 at 17:14

3 votes

0 answers

271 views

Total number density of galaxies and problematic expression in practise

galaxy astrophysics cosmology galaxy-cluster

asked Dec 12, 2018 at 13:48

3 votes

1 answer

811 views

Extract anomalies from two-line element set (TLE) on ISS (International Space Station)

orbit orbital-mechanics iss

asked Dec 26, 2018 at 0:12

2 votes

0 answers

114 views

Need help on Springel model for galaxy simulation

galaxy dark-matter galactic-dynamics disk

asked Apr 3, 2017 at 4:13

2 votes

1 answer

841 views

How to find inverse steradian from $\text{arcmin}^{-2}$ for density of galaxy

galaxy angular-resolution density

asked Apr 30, 2019 at 1:37

2 votes

1 answer

71 views

From original burst, fraction of stellar mass still surviving on Main sequence

galaxy stellar-evolution density initial-mass-function

asked Dec 16, 2018 at 1:21

2 votes

0 answers

71 views

Compute the total stellar mass of galaxy with major influence of Red Giants luminosity

galaxy stellar-evolution mass stellar-astrophysics initial-mass-function

asked Dec 16, 2018 at 11:25

2 votes

1 answer

70 views

Retrogradation movement of planet Mars relatively from Earth by Copernic

earth mars near-earth-object

asked Jul 3, 2020 at 19:07

2 votes

0 answers

137 views

Clarifications about distances in cosmology

cosmology coordinate hubble-constant cosmological-horizon angular-diameter

asked Oct 24, 2020 at 23:43

2 votes

0 answers

32 views

Demonstration of scales for the two components (transverse and perpendicular) of Baryonic Acoustic Oscillations (BAO)

observational-astronomy astrophysics cosmology observable-universe

asked Jul 29, 2020 at 0:37

2 votes

0 answers

14 views

Is threre a relation between relative or absolute error and standard deviation for ratio of power spectra?

spectroscopy spectra photometry

asked Apr 20, 2021 at 16:15

2 votes

0 answers

31 views

Cosmic variance - Fourier Transform - a few precisions

galaxy cosmology spectra galaxy-cluster

asked May 15, 2021 at 20:52

2 votes

0 answers

99 views

Poisson noise for a squared contrast of density - expression of variance equal to $1/n^2$

galaxy astrophysics cosmology

asked Jun 1, 2021 at 0:14

2 votes

0 answers

32 views

Looking for analytical expression of Cosmic Variance - Poisson distribution?

galaxy astrophysics cosmology dark-matter density

asked Jun 13, 2021 at 10:17

2 votes

0 answers

141 views

Cosmology context plotting : Covariance matrix - Script to plot Omega_m vs Omega_Lambda diagram in Python

astrophysics cosmology supernova cosmic-microwave-background

asked Oct 10, 2021 at 20:15

2 votes

0 answers

98 views

Force to fix $\sigma_{8}$ or $A_{s}$ for Forecasts

astrophysics cosmology

asked Feb 9, 2020 at 11:28

2 votes

1 answer

84 views

Demo to get Matter Power Spectrum in cosmology

cosmology dark-matter spectra dark-energy density

asked Feb 10, 2021 at 15:53

1 vote

1 answer

318 views

Transverse Comoving distance

cosmology distances cosmological-horizon angular-diameter

asked Oct 25, 2020 at 13:39

1 vote

0 answers

93 views

Formula to Compute sigma8 for correction in non-linear regime

cosmology dark-matter dark-energy matter

asked Dec 26, 2019 at 21:21

1 vote

0 answers

54 views

Deducing distance of closest neighbor galaxy from expression of correlation and mean galaxy density

galaxy cosmology distances galaxy-cluster

asked Dec 22, 2018 at 20:58

1 vote

1 answer

74 views

number density of Dark Matter Halos Versus number density of Galaxies

galaxy dark-matter galaxy-cluster density

asked Dec 12, 2018 at 20:18

1 vote

1 answer

310 views

Computing the local orbital frame vector directions in a geocentric reference frame

orbit orbital-mechanics satellite artificial-satellite geocentrism

asked Jan 13, 2019 at 18:26

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28 Questions

Exoplanet dip in transit light curve when the planet passes behind the star

Get the expression of probed volume between 2 redshifts

Interpretation and understanding of the relation for the photometric redshift in a given bin

Understanding better the factors on $C_l$ in Angular power spectrum and Relation with Matter power spectrum

Cosmology : Formula for the bias of galaxies

Cross-correlations between Lagrange and Fourier synthesis

Expresion of comoving distance

Total number density of galaxies and problematic expression in practise

Extract anomalies from two-line element set (TLE) on ISS (International Space Station)

Need help on Springel model for galaxy simulation

How to find inverse steradian from $\text{arcmin}^{-2}$ for density of galaxy

From original burst, fraction of stellar mass still surviving on Main sequence

Compute the total stellar mass of galaxy with major influence of Red Giants luminosity

Retrogradation movement of planet Mars relatively from Earth by Copernic

Clarifications about distances in cosmology

Demonstration of scales for the two components (transverse and perpendicular) of Baryonic Acoustic Oscillations (BAO)

Is threre a relation between relative or absolute error and standard deviation for ratio of power spectra?

Cosmic variance - Fourier Transform - a few precisions

Poisson noise for a squared contrast of density - expression of variance equal to $1/n^2$

Looking for analytical expression of Cosmic Variance - Poisson distribution?

Cosmology context plotting : Covariance matrix - Script to plot Omega_m vs Omega_Lambda diagram in Python

Force to fix $\sigma_{8}$ or $A_{s}$ for Forecasts

Demo to get Matter Power Spectrum in cosmology

Transverse Comoving distance

Formula to Compute sigma8 for correction in non-linear regime

Deducing distance of closest neighbor galaxy from expression of correlation and mean galaxy density

number density of Dark Matter Halos Versus number density of Galaxies

Computing the local orbital frame vector directions in a geocentric reference frame