Not to change the subject ongoing, but adding what knowledge I can find out about the Suns of Reticuli:
This will take some effort if anyone wants to look at all the data presented.
This data from only 2 Catalogs give information concerning the Reticuli Suns compared to our Sun:
First one seems to be an Iron comparison perhaps (but is a study done) and the second listing is more elements compared between our Sun and Reticuli
Suns:
I have not had a chance to really know all the data and elements contained within the Catalogs' data, but nonetheless, it is the data that we do know
about concerning the Reticuli Suns.
First links are an instersting place --- that is listing finding Planets -- although I think it concerns Planets around the size of Jupiter so far or
so.
Nonetheless -- there in the Summary link page are 156 planets!
Planets search place: (Interesting but no data for Zeti 1 or 2 Reticuli)
The Geneva Extrasolar Planet Search Programmes
obswww.unige.ch...
obswww.unige.ch...
obswww.unige.ch...
Next is data concerning the two Suns of Reticuli and elements within those Suns:
First the main link:
Then looking up the individual two Suns of Reticuli, the Catalogs used (out of many listed), anyone can use and look all day at:
The two Catalogs used contain -- chemical elements data:
U.S. National Virtual Observatory
www.us-vo.org...
Look up: (Used HD numbers for Zeta 1 & 2 Reticuli -- HD20766 and HD20807)
irsa.ipac.caltech.edu...
----List of Catalogs just for Zeta 1 Reticuli (same for Zeta 2)
Zeta 1 Reticuli Catalog Coverage: (LHS 171) (all the catalogs that contain data)
irsa.ipac.caltech.edu...
Out of the many Catalogs where data can be looked up for the Reticulum stars:
(First Catalog used -- show amount of Iron type data for Suns compared with our Sun - Fe is Iron - rest I am not sure about -- H may be Hydrogen
perhaps)
Catalog used: (checkbox clicked on to show data)(down in list towards bottom)
Catalog Name:
[Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)
Stars with planets and derived stellar parameters (HD number between 1 and 60000)
Explains the data:
vizier.u-strasbg.fr.../A+A/415/1153/suns
Image region of Zeta 1:
irsa.ipac.caltech.edu...
%2FJ.A%2BA.415.1153.suns%3A1&catlist=%2Fwork%2FTMP_AAAP.aizo%2FQuickStats_Q.aizo%2Fcatlist.dat
Results page for Catalog used for Zeta 1:
vizier.u-strasbg.fr.../A+A/415/1153/suns&-c.eq=J2000&-c.geom=r&-out.max=9999&-out.form=HTML%20Table&-out.add=_RAJ2000,_DE
J2000&-out.add=_r&-oc.form=deg&-out.add=_RAJ%2C_DEJ&-c=49.442350+-62.575320&-c.eq=J2000&-c.r=0.083333&-c.u=deg&-c.geom=r&-sort=_r
Record for Zeta 1:
vizier.u-strasbg.fr.../A%2bA/415/1153/suns&recno=131
Zeta 1:
cmp c [c] Comparison sample (in table5 only)
HD 20766 HD number
m_HD Multiplicity index on HD
n_HD [bc] Note on HD (Note 1)
Teff 5733 K Effective temperature
e_Teff 31 K rms uncertainty on Teff
logg 4.55 [cm/s2] Spectroscopic surface gravity
e_logg 0.10 [cm/s2] rms uncertainty on logg
Vt 1.09 km/s Microturbulence
e_Vt 0.06 km/s rms uncertainty on Vt
[Fe/H] -0.21 [Sun] Derived metallicity
e_[Fe/H] 0.04 [Sun] rms uncertainty on [Fe/H]
N(FeI) 37 Number of FeI lines used in the analysis
N(FeII) 7 Number of FeII lines used in the analysis
e_N(FeI) 0.03 rms around the mean [FeI/H] values
e_N(FeII) 0.04 rms around the mean [FeII/H] values
Inst [1] Instrument, or avg for averaged values (Note 2)
Mass 0.93 solMass Stellar mass
loggHIP 4.51 [cm/s2] Surface gravity based on Hipparcos parallax (trigonometric gravity)
Zeta 2 Reticuli Catalog Coverage: (LHS 172)
irsa.ipac.caltech.edu...
Done above process for Zeta 2 from point of Catalog Used:
Record for Zeta 2:
vizier.u-strasbg.fr.../A%2bA/415/1153/suns&recno=133
Zeta 2:
cmp c [c] Comparison sample (in table5 only)
HD 20807 HD number
m_HD Multiplicity index on HD
n_HD [bc] Note on HD (Note 1)
Teff 5843 K Effective temperature
e_Teff 26 K rms uncertainty on Teff
logg 4.47 [cm/s2] Spectroscopic surface gravity
e_logg 0.10 [cm/s2] rms uncertainty on logg
Vt 1.17 km/s Microturbulence
e_Vt 0.06 km/s rms uncertainty on Vt
[Fe/H] -0.23 [Sun] Derived metallicity
e_[Fe/H] 0.04 [Sun] rms uncertainty on [Fe/H]
N(FeI) 37 Number of FeI lines used in the analysis
N(FeII) 7 Number of FeII lines used in the analysis
e_N(FeI) 0.03 rms around the mean [FeI/H] values
e_N(FeII) 0.04 rms around the mean [FeII/H] values
Inst [1] Instrument, or avg for averaged values (Note 2)
Mass 0.94 solMass Stellar mass
loggHIP 4.45 [cm/s2] Surface gravity based on Hipparcos parallax (trigonometric gravity)
Results page for Catalog used for Zeta 2: (link like used for Zeta 1 Reticuli - just listed below - info above)
vizier.u-strasbg.fr.../A+A/420/183/table3&-c.eq=J2000&-c.geom=r&-out.max=9999&-out.form=HTML%20Table&-out.add=_RAJ2000,_D
EJ2000&-out.add=_r&-oc.form=deg&-out.add=_RAJ%2C_DEJ&-c=49.442350+-62.575320&-c.eq=J2000&-c.r=0.083333&-c.u=deg&-c.geom=r&-sort=_r
Second Catalog used for data:
Diffferent Catalog used now: (this time a different catalog used -- shows many regions of elements compared to our Sun) (below - Catalog Name)
(Checkedbox marked to show data)
Catalog Name:
Spectroscopic survey in solar neighborhood (Allende Prieto+ 2004) (down in list towards bottom again)
Zeta2:
vizier.u-strasbg.fr...
Zeta 1:
vizier.u-strasbg.fr...
Both of the above Catalogs down near bottom of all the Catalogs listed that contain data for Suns!
That is all I have time for today, but both Suns seem pretty close to our Sun.
And it seems Zeta 2 Reticuli contains a bit more mass (compared to our Sun) then Zeta 1 Reticuli.
Plus -- I am not sure what all the data means so far yet, but data is data, and it is data comparing our Sun with those two Suns there.