23547defe022ec0e08d8cfcfc3c729f9333e4a45
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Commits
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  SenrokaiandClaude Opus 5.5
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23547defe0 |
Read an archive host's colour off the dwarf sequence at its temperature, and say it was not measured
For an archive-placed host with a temperature and no B magnitude, fetchExoplanets took B−V from Ballesteros' blackbody fit, which runs 0.1 to 0.2 redder than Pecaut & Mamajek's dwarf sequence below 3 800 K, and the luminosity then read its correction off that sequence at that colour: 3 500 K came back as 3 102 K with a correction 1.15 magnitudes too large, anything under about 3 170 K was clamped to B−V 2.00, and the card printed it as a measured "Colour B−V 2.00". CFBDSIR J145829+101343, a 580 K brown dwarf, read "Spectral type ~M6, from colour". temperatureToColorIndex now reads the table itself backwards, interpolating B−V between the two types the temperature falls between, so the temperature and correction read back off the colour are the table's at that temperature; it has no answer outside 2 420 to 31 400 K. The colour is flagged colorFromTemperature, a fifth bit in the photometry byte (the format, README and the ETL's round-trip check follow), and the card prints it "B−V 1.66, from its temperature", marked derived. From cache: 57 archive stars change colour; 54 carry the flag and 3, CFBDSIR J145829+101343 among them, now have none. For the 47 of them the archive gives a luminosity, the one derived from magnitude and colour moves from a median 0.228 dex off it to 0.124; Kepler-445 (3 157 K) from 0.0282 L☉ to 0.0080 against the archive's 0.0079. Its colour goes from 2.00 to 1.67. The card shows the archive's luminosity where it has one since earlier on this branch, so this is the figure used for the rest and for their radii. Controls, each failing its named test: the nearest hotter row taken without interpolating (2 of 803 failed), no refusal outside the table, the flag not encoded, and the card calling the colour measured (1 of 803 each). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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f8af0ecf6e |
List stars in search and routes by the type their colour gives them, and say where archive positions come from
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SenrokaiandClaude Opus 5.5
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4191b70e63 |
Tint a star measured in Gaia's BP−RP as the B−V of the dwarf of that colour
colorIndexToRgb maps a B−V onto the star field's tint ramp, and its one caller passed it every star's colour index, whatever colorSystem said. BP−RP is the larger of the two for the same star — 0.823 against 0.65 for a G2 dwarf, 1.84 against 1.42 for an M0 (Pecaut & Mamajek) — so the 376 703 stars measured in it, 83 % of the catalogue, were tinted as later types than they are, and redder than HYG's stars of the same type, and than their own disc in the system view. A BP−RP is now carried to the B−V of the dwarf sequence at that colour (the table's own B−V column, which DwarfSequencePoint now returns, clamped at its ends), then tinted as before. The median Gaia colour, BP−RP 0.883, a G7 dwarf, read as a K2: its tint goes from (1, 0.972, 0.955) to (0.975, 0.982, 1), the same as HYG's G7 stars. Controls, each failing its named test: BP−RP read as B−V (2 of 792 failed), the star field not passing the colour system (1 of 792), and the B−V taken from the wrong column (3 of 792). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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31e0c04fe1 |
Read a colour past either end of the dwarf table at that end, where the star has no type instead
dwarfSequenceAtColor answers null outside Pecaut & Mamajek's table, B−V −0.301 to 2.16 and BP−RP −0.12 to 5.1, and effectiveTemperatureK then fell back on the type, which Gaia's stars do not have and carbon stars' parser does not read. 219 stars with a measured colour got no temperature and so no radius, and were drawn at the Sun's radius in the Sun's colour: 110 white dwarfs within 50 pc, 38 Gaia stars redder than BP−RP 5.1 (Gaia DR3 6439125097427143808, an ultracool dwarf 4.0 pc away), HD 46687, La Superba and the other carbon stars, and an O8 star. Past the table, the colour is now read at the row it is past (clampToTable), but only for a star with no readable type: beside a type an off-table colour is more often the bad measurement — HD 49748 is G5 V at B−V −0.32 — so the type still wins there, as it did. The luminosity reads the same point, so a star past the red end also gets the M8.5 row's G−V and correction. A type's own colour past the table, which only O types have, is read at B0. Carbon and S stars (C, N, R, S) now count as giants, so their correction stays their type's, not an M8.5 dwarf's −5.78. Measured on the shipped catalogue: stars without a temperature 3 053 -> 2 834, without a radius 3 077 -> 2 858; all 292 stars with an off-table colour now have a temperature, against 73. Gaia DR3 6439125097427143808 is 2 420 K and 0.110 R☉ (M8.5 V: 0.104); the 110 white dwarfs a median 0.018 R☉ at 10 700 K (0.0013 to 0.034); HD 46687 212 R☉ at 2 420 K and La Superba 133; audit #16's Gaia DR3 5612323414549657984, k1 Pup, B6 V at BP−RP −0.15, 203 L☉ and 4.1 R☉ against 143 and none (FLAME gives 336 and 3.49). The 2 851 stars left without a radius have neither a colour nor a readable type, or no band. Controls, each failing its named test: no clamp for an untyped star (2 of 784 failed), the clamp winning over a type, an O type's colour unclamped, the luminosity off the unclamped sequence, and carbon stars not counted as giants (1 of 784 each); clampToTable ignored (3 of 784). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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d097f4b477 |
Correct a giant's light by its type, not by the cooler dwarf its colour reads as
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SenrokaiandClaude Opus 5.5
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3392f06c85 |
Read a star's bolometric correction off its colour, and carry Gaia's G to V first
A star's luminosity was its absolute magnitude plus a bolometric correction read off its spectral type, with its magnitude taken as V whatever band it was in. Gaia classifies none of its stars, so all of its 379 000 got the Sun's correction, and their G was read as V: TRAPPIST-1 came out at a seventh of its luminosity. The dwarf sequence spectral.ts already reads types off (Pecaut & Mamajek 2013, table 5, online version 2022.04.16) now carries its effective temperature, bolometric correction to V and Gaia G-V columns, and dwarfSequenceAtColor interpolates them at a colour, in the colour's own system. luminositySolar uses it wherever the star's colour is inside the table: the G magnitude is carried to V, then corrected. Only without such a colour does it fall back to the spectral type, as before. Against the archive's own st_lum for the 1 449 hosts that are catalogue stars, the median error goes from 0.038 to 0.022 dex and the 90th percentile from 0.292 to 0.115 dex; within a factor of 1.5, 84.5 % -> 93.8 %. For the 572 hosts Gaia describes: 90th percentile 0.332 -> 0.073 dex, 81.8 % -> 97.0 % within a factor of 1.5. Barnard's Star with no type now reads 0.0029 L_sun against 0.0035 published, and TRAPPIST-1 7.3e-4 against 5.5e-4 (Agol et al. 2021). Across the catalogue, 311 255 of 455 608 stars move by more than 10 % (median ratio 0.90: a G-type star's G is 0.16 brighter than its V), and so do the hosts of 3 158 planets, whose equilibrium temperatures follow as the fourth root. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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5333be615e |
Estimate a spectral type from each star's colour where no catalogue gives one, and say so
383 695 of the 455 608 stars read "Spectral type Unknown", every Gaia star among them, although 380 884 of them carry a colour. The card now gives those the type of the dwarf whose colour is nearest, in the colour's own system, marked as an estimate: TRAPPIST-1, BP-RP 4.90, reads "Spectral type ~M8, from colour", which is how it was classified (M8 V). A star with neither a type nor a colour gets no subtitle rather than the literal "Unknown". The colours are Pecaut & Mamajek's mean dwarf sequence (2013, ApJS 208, 9, table 5), as Mamajek maintains it online (version 2022.04.16, which carries Gaia BP-RP), from B0 to M8.5. B-V cannot tell O types apart (the whole sequence spans 0.03 of it), and BP-RP turns back past M8.5 and is tabulated only from B9. A colour outside the table gets no estimate: 186 BP-RP and 41 B-V colours, among them the blue Gaia DR3 5612323414549657984 at BP-RP -0.15. 380 657 stars get an estimate: F 97 840, G 144 327, K 105 984, M 29 142, A 3 272, B 92. Checked against catalogued types: - 19 433 HYG dwarfs with a B-V: 74.3 % within two subclasses, 95.5 % within five. - 146 Gaia exoplanet hosts the archive types as dwarfs, from BP-RP: 88.4 % within two subclasses, 98.6 % within five. The estimate assumes a dwarf, so a giant reads later than it is (Pollux, K0 III at B-V 0.99, reads K3). It also ignores reddening. The comment says both. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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SenrokaiandClaude Opus 5.5
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4c8e4a02f3 |
Give every planet with a distance a star, from the archive where the catalogue has none
After matching, 4 237 planets still had no star: their hosts are too faint for either Gaia query (fainter than G 12 past 50 pc) or too far (past 250 pc), Kepler-186 at 177.6 pc among them. fetchExoplanets now adds one star per such host from the archive's own figures, 3 277 of them, whenever the archive gives a position and a distance: - position carried back from J2016, where the archive publishes it (741 of the 746 matched hosts moving over 100 mas/yr sit nearer their star carried back, a median 0.11" against 3.47" as published), and placed at sy_dist; - magnitude in V (2 999 hosts), else Gaia G (13), the band the catalogue's Gaia stars are already in; 265 have neither, 128 KMT, 95 OGLE and 32 MOA microlensing hosts at a median 6.2 kpc among them, and take the ETL's faint stand-in of 15; - colour as B-V from the archive's B and V, else from st_teff through a new temperatureToColorIndex (Ballesteros 2012, inverted; the Sun's 5 772 K gives 0.65), else left to st_spectype; - ids from 1 070 000 000, past Gaia's two ranges and under the 2^30 validateStars enforces; source "exoplanet-archive". Hosts past 250 pc are included: 399 of the 3 277 are within 250 pc, 1 962 between 250 pc and 1 kpc, 916 beyond. The drawn budget still chooses what is drawn (70 000 of 455 608). Planets with a star: 2 090 -> 6 327 of 6 354. The other 27 have no distance in either table (Luhman 16 A, mu2 Sco, PSR B1620-26 among them). Systems in the Solar Neighbourhood readout: 1 450 -> 4 736. validateExoplanets now refuses a catalogue where fewer than 99.5 % of planets have a host (measured 99.58 %); dropping the added stars fails it at 2 090, and dropping the composite fill at 6 227. No added star sits within an arcsecond of a catalogue star (validateMerge's twins stay at 23); 5 of the 399 within 250 pc have one within a minute of arc, VHS J125601.92-125723.9 (archive 12.7 pc) 5.8" from a Gaia entry at 21.2 pc the likeliest duplicate. In the app, searching TRAPPIST-1 or Kepler-186 and picking the star enters a system with its seven and five planets drawn. gzip -9: stars.bin 5 030 741 -> 5 067 864 B, stars-meta.bin 2 784 614 -> 2 804 064, stars-index.json 4 003 584 -> 4 015 882, exoplanets.json 342 467 -> 446 532 (host parameters, both commits). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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Claude
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4aca223027 |
Regenerate the star catalogue, fixing 2331 names and 875 colours
Two ETL bugs, both fixed at the source and then re-run against HYG. Star ids,
ordering and positions are all unchanged, so stars.bin is byte-identical and
every exoplanet cross-reference still resolves.
Names. HYG's `gl` column already carries its own catalogue prefix ("Gl 581",
"GJ 3512"), unlike the bare numbers in `hd` and `hip`, so prefixing it again
produced 2331 of 8750 stars named "Gl GJ 1076". That corrupted three surfaces at
once: search, the on-screen labels, and exoplanet host-star name matching, which
compares normalised names and could never match "glgj1076" to "gj1076".
Colours. `Number(row['ci']) || 0` cannot tell a blank cell from a real zero, and
0 is a real B-V colour index meaning a hot blue-white A-type star. All 875
affected stars turned out to be blanks — the catalogue contains no genuine zero
inside the distance cutoff — so several hundred red dwarfs were rendering
blue-white. colorIndex is now `number | null` rather than defaulted, because any
numeric default is indistinguishable from a measurement.
Consumers resolve the gap from the spectral type instead. That needs real
parsing: HYG's `spect` column runs to 134 distinct spellings among the affected
stars alone, including a bare lowercase "m" for 354 of them, plus "k-m" ranges,
"dM4" luminosity prefixes and "K:" uncertainty flags. 622 of the 875 recover a
class this way — 497 of them M-class — and the remaining 253, which carry no
classification at all, fall back to neutral white.
The parse is anchored at the start of the string rather than scanning it. A scan
is the obvious implementation and is quietly wrong: the ETL writes the literal
"Unknown" for unclassified stars, that contains a K, and every one of those 253
would have been classified as an orange K-type. A test covers it.
Also lifts parseOptionalNumber out of fetchExoplanets into lib/csv, where both
fetchers now use it, and gives magnitude a faint default instead of 0 — no
current star is affected, but 0 would mean "as bright as Vega" and render an
unphotometered star as one of the largest points on the map.
Tests: 145 passing, up from 116, including the first coverage of
StarFieldRenderer. Build, both typechecks and the Playwright suite are green.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G
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