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VI/137            GaiaSimu Universe Model Snapshot               (Robin+, 2012)

GaiaSimu Universe Model Snapshot. Robin A.C., Luri X., Reyle C., Isasi, Grux E., Blanco S., Arenou F., Babusiaux C., Belcheva M., Drimmel R., Jordi C., Krone-Martins A., Masana E., Mauduit J.C., Mignard F., Mowlawi N., Rocca-Volmerange B., Sartoretti P., Slezak E., Sozzetti A. <Astron. Astrophys. 543, A100 (2012)> =2012A&A...543A.100R
ADC_Keywords: Surveys ; Positional data ; Galaxy catalogs Keywords: Astrophysics - Galaxy Astrophysics, Astrophysics Cosmology and Extragalactic Astrophysics, Astrophysics Instrumentation and Methods for Astrophysics, Astrophysics Solar and Stellar Astrophysics Mission_Name: Gaia Abstract: Context: This study has been developed in the framework of the computational simulations that are executed for the preparation of the ESA Gaia astrometric mission. Aims: We focus on describing the objects and characteristics that Gaia will potentially observe without taking into consideration instrumental effects (detection efficiency, observing errors). Methods: The theoretical Universe Model prepared for the Gaia simulation has been statistically analysed at a given time. Ingredients of the model are described, with the greatest emphasis on the stellar content, the double and multiple stars, and variability. Results: In this simulation the errors have not yet been included. Hence we estimated the number of objects and their theoretical photometric, astrometric and spectroscopic characteristics if they are perfectly detected.We show that Gaia will be able to potentially observe 1.1 billion of stars (single or part of multiple star systems) of which about 2% are variable stars and 3% have one or two exoplanets. At the extragalactic level, observations will be potentially composed of several millions of galaxies, half a million to 1 million quasars and about 50,000 supernovae that will occur during the five years of the mission. Description: GUMS-10 is the 10th version of the Gaia Universe Model Snapshot, a simulation of the expected contents of the Gaia catalogue run at the MareNostrum supercomputer. The simulated catalogue will be made publicly available by the DPAC on the Gaia portal of the ESA web site http://www.rssd.esa.int/gaia/ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file gum_mw.sam 364 1000 Gaia Universe Model Snapshot (GUMS): Milky Way stars (among 2,143,475,885 stars) gum_lmc.sam 364 1000 Gaia Universe Model Snapshot (GUMS): LMC stars (among 7,559,826 stars) gum_smc.sam 364 1000 Gaia Universe Model Snapshot (GUMS): SMC stars (among 1,250,384 stars) gum_gal.sam 240 1000 Gaia Universe Model Snapshot (GUMS) (galaxies) (among 37,831,197 sources) gum_qso.dat 186 979315 Gaia Universe Model Snapshot (GUMS) (quasars) gum_sn.dat 160 49814 Gaia Universe Model Snapshot (GUMS (supernovae)
See also: I/337 : Gaia DR1 (Gaia Collaboration, 2016) https://www.cosmos.esa.int/web/gaia : GAIA Home Page Byte-by-byte Description of file: gum_mw.sam gum_lmc.sam gum_smc.sam
Bytes Format Units Label Explanations
1- 19 A19 --- ID source identifier (sourceExtendedId) 21- 34 F14.10 deg RA2kdeg Right ascension ICRS, Epoch=J2000 (G1) 36- 49 F14.10 deg DE2kdeg Declination ICRS, Epoch=J2000 (G1) 51- 56 F6.3 mag VMAG V-band absolute magnitude (meanAbsoluteV) 58- 63 F6.3 mag Gmag Gaia G-band magnitude (350-1050nm) (magG) 65- 70 F6.3 mag GBmag Gaia Gbp band magnitude (350-770nm) (magGBp) 72- 77 F6.3 mag GRmag Gaia Grp band magnitude (650-1050nm) (magGRp) 79- 84 F6.3 mag Gsmag Gaia Grvs magnitude (860±28nm) (magGRvs) 86- 99 F14.10 deg RAdeg Right ascension (ICRS, Epoch=J2010) (alpha) 101-114 F14.10 deg DEdeg Declination (ICRS, Epoch=J2010) (delta) 116-122 F7.1 pc r Barycentric distance (distance) 124-132 F9.3 mas/yr pmRA Proper motion in RA (*cos(DE)) (muAlpha) 134-142 F9.3 mas/yr pmDE Proper motion in Declination (muDelta) 144-150 F7.1 km/s RV Barycentric radial velocity (radialVelocity) 152-157 F6.3 mag V-I Intrinsic color V-I (colorVminusI) 159-163 F5.3 mag Av Absorption (Av) 165-170 F6.3 Gyr Age Estimated age (age) 172-176 F5.2 [Sun] [a/Fe] α-elements enhancement (alphaFe) 178-181 F4.2 --- bAlb [0/1] Bond albedo (for exoplanet) (bondAlbedo) 183-187 F5.3 --- e Eccentricity (for binaries) (eccentricity) 189-193 F5.2 [Sun] [Fe/H] Metallicity [Fe/H] (feH) 195 I1 --- fI [0,1] 1 (true) if interacting with a companion (flagInteracting) 197-200 F4.2 --- gAlb Geometric albedo (for exoplanet) (geomAlbedo) 202 I1 --- fm [0,1] 1 (true) if photocenter moves (hasPhotocenterMotion) 204 I1 --- Host Host galaxy: 1=Milky Way, 2=SMC, 3=LMC (host) 206-209 F4.1 deg i Orbit Inclination (inclination) 211-216 F6.3 [cm/s2] logg Gravity (log) (logg) 218-222 F5.1 deg Omega Longitude of ascending node Ω (longitudeAscendingNode) 224-232 F9.4 Sun Mass Stellar mass (mass) 234-239 F6.3 mag Mbol Bolometric absolute magnitude (mbol) 241 I1 --- nc [1-5] Number of components in the system 243 I1 --- nt [1-5] Total number of objects in the system 245-255 E11.6 d P Orbital period (orbitPeriod) 257-261 F5.1 deg omega Periastron argument ω(periastronArgument) 263-273 E11.5 d T0 Periastron date (MJD) (periastronDate) 275-277 F3.1 --- Phase [0/1] Phase if an exoplanet (phase) 279-280 I2 --- Pop [1/3]?=99 Stellar population the object belongs to (population) 282-288 F7.4 --- BeEnv Envelope characteristic for Be star (Renv/R*) (rEnvRStar) 290-300 E11.4 Rsun Radius Stellar radius (radius) 302-312 E11.4 au a Semi-major axis (in binary system) (semimajorAxis) 314-319 I6 K Teff Effective temperature (teff) 321-326 F6.3 mag Vamp Variability amplitude (variabilityAmplitude) 328-336 F9.5 d Vper Variability period (variabilityPeriod) 338-342 F5.3 --- Vphase [0/1] Variability phase (variabilityPhase) 344-347 A4 --- Vtype Variability type (variabilityType) (2) 349-353 F5.1 km/s vsini Rotational velocity 355-364 I10 --- recno [1/2143475885] Original record number
Note (2): variability types are: Ceph = Cepheids (pulsating supergiants) delt = δ Sct-type (fainter and shorter periods that Cepheids) RRLy = RR Lyr-type, sub-classified in RRab (asymmetric) or RRc (symmetric) gamm = γ Dor-type (non-radial pulsations) RoAp = rapidly oscillating Ap stars ZZce = pulsating white dwarfs Mira = Mira Ceti type (Cool red supergiants) semi = semiregular, usually red giants or supergiants ACV = α2 CVn-type (strong magnetic field) Flar = flare stars (magnetic reconnection in dM stars) Nova = classical nova (white dwarf accreting matter from its companion) DN = dwarf novae (white dwarf accreting matter with instable disk) EB = eclipsing binary micr = microlensing event
Byte-by-byte Description of file: gum_gal.sam
Bytes Format Units Label Explanations
1- 19 A19 --- ID Source identifier (sourceExtendedId) 21- 34 F14.10 deg RA2kdeg Right ascension ICRS, Epoch=J2000 (G1) 36- 49 F14.10 deg DE2kdeg Declination ICRS, Epoch=J2000 (G1) 51- 57 F7.3 mag Vmag V-band intrinsic (extinction free) apparent mean magnitude (meanAbsoluteV) 59- 64 F6.3 mag Gmag Gaia G-band magnitude (350-1050nm) (magG) 66- 71 F6.3 mag GBmag Gaia Gbp band magnitude (350-770nm) (magGBp) 73- 78 F6.3 mag GRmag Gaia Grp band magnitude (650-1050nm) (magGRp) 80- 85 F6.3 mag Gsmag Gaia Grvs magnitude (860±28nm) (magGRvs)nm) 87-100 F14.10 deg RAdeg Right ascension (ICRS, Epoch=J2010) (alpha) 102-115 F14.10 deg DEdeg Declination (ICRS, Epoch=J2010) (delta) 117-128 E12.4 pc r Barycentric distance (distance) 130-135 F6.3 mas/yr pmRA Proper motion in RA (*cos(DE)) (muAlpha) 137-142 F6.3 mas/yr pmDE Proper motion in Declination (muDelta) 144-151 F8.1 km/s RV Barycentric radial velocity (radialVelocity) 154-155 I2 --- SNID [-1] Attached supernova ID (not filled) 157-161 F5.3 mag V-I Intrinsic color V-I (colorVminusI) 163 I1 --- Htype [0-8] Hubble type (hubbleType) (3) 165-170 F6.3 mag Av Absorption in the V-band 172-179 F8.6 --- z Redshift (redShift) 181-186 F6.4 --- B/T [0,1] Bulge to total flux ratio (4) 188-193 F6.4 arcsec Brad Bulge equivalent radius (4) 195-200 F6.4 --- Bb/a [0,1] Bulge aspect ratio b/a (4) 202-208 F7.2 deg Bpa [-180/180] Bulge position angle (4) 210-216 F7.4 arcsec Dsize Disk scale length (4) 218-223 F6.4 --- Db/a [0,1] Disk aspect ratio b/a (4) 225-231 F7.2 deg Dpa Disk position angle (4) 233-240 I8 --- recno [1/37831197] Original record number
Note (3): the 8 classes are: 0..7 = E2, E-S0, Sa, Sb, Sbc, Sc, Sd, Im 8 = QSPG: Quenched Star Forming Galaxies (2009A&A...504.1071T) Note (4): these parameters represent the SkyMaker shape parameters. Note that the position angles are measured with respect to the RA axis.
Byte-by-byte Description of file: gum_qso.dat
Bytes Format Units Label Explanations
1- 12 F12.8 deg RA2kdeg Right ascension (ICRS), at Epoch J2000 (G1) 14- 25 F12.8 deg DE2kdeg Declination (ICRS), at Epoch J2000 (G1) 27- 38 F12.8 deg RAdeg Right ascension (ICRS), at Epoch J2010 (alpha) 40- 51 F12.8 deg DEdeg Right ascension (ICRS), at Epoch J2010 (delta) 54- 58 I5 Mpc r Barycentric distance (distance) 60- 68 F9.5 mas/yr pmRA Proper motion in RA (*cos(DE)) (muAlpha) 70- 78 F9.5 mas/yr pmDE Proper motion in Declination (muDelta) 81- 86 I6 km/s RV Barycentric radial velocity (radialVelocity) 88- 93 F6.3 mag Gmag Gaia G-band magnitude (350-1050nm) (magG) 95-100 F6.3 mag GBmag Gaia Gbp band magnitude (350-770nm) (magGBp) 102-107 F6.3 mag GRmag Gaia Grp band magnitude (650-1050nm) (magGRp) 109-114 F6.3 mag Gsmag Gaia/Grvs band magnitude (850-880nm) (magGRvs) 116-121 F6.3 mag Av Galactic absorption in the V-band 124-128 F5.3 --- z Redshift (redShift) 130-135 F6.3 --- slope Slope of the continuum 138-142 I5 --- W Total equivalent width of the emission lines 144-161 A18 --- ID Source identifier (sourceExtendedId) 168-186 A19 --- objID GUMS source identifier (sourceId)
Byte-by-byte Description of file: gum_sn.dat
Bytes Format Units Label Explanations
1- 14 F14.10 deg RA2kdeg Right ascension (ICRS), at Epoch J2000 (G1) 16- 29 F14.10 deg DE2kdeg Declination (ICRS), at Epoch J2000 (G1) 31- 44 F14.10 deg RAdeg Right ascension (ICRS), at Epoch J2010 (alpha) 46- 59 F14.10 deg DEdeg Right ascension (ICRS), at Epoch J2010 (delta) 61- 67 F7.2 Mpc r Barycentric distance distance) 69- 77 E9.3 mas/yr pmRA Proper motion in RA (*cos(DE)) (muAlpha) 79- 87 E9.3 mas/yr pmDE Proper motion in Declination (muDelta) 90- 95 I6 km/s RV Barycentric radial velocity (radialVelocity) 97-102 F6.2 mag VMAG V-band absolute magnitude (meanAbsoluteV) 104-111 F8.5 --- z Redshift (redShift) 113-116 A4 --- SNt Type of the supernova (gmdbtype) 118-135 A18 --- ID Source identifier (sourceExtendedId) 142-160 A19 --- objID GUMS extended source identifier (sourceId)
Global Notes: Note (G1): position added by the CDS
History: * 11-May-2012: installed for private access only * 10-Aug-2012: installed for public access, without the supernova file * 14-Sep-2012: installed in 3 files for stars (MW, LMC, SMC). The "shape parameters" describing the galaxies have been described.
(End) Francois Ochsenbein, Gilles Landais [CDS] 11-May-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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