Gaia measured distances to 1.3 billion stars! But Gaia is not alone in the era of Big Astronomical Data™. Pan-STARRS DR2 is 1.6 petabytes of photometry, and LAMOST DR5 has over 9 million spectra!pic.twitter.com/HWloalVE4w
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We updated some of the photometry in the EPIC using Pan-STARRS, used the http://gaia-kepler.fun database to cross-match Gaia and K2 targets, and cross-matched the K2 targets with LAMOST to find ~27,000 K2 targets with a spectrum.pic.twitter.com/ofBlTwRTGu
1 reply 0 proslijeđenih tweetova 2 korisnika označavaju da im se sviđaPrikaži ovu nit -
The LAMOST pipeline provides spectral types, temperatures, surface gravities, and metallicities for A, F, G, and K stars, but not M dwarfs. Luckily, I know a thing or two about M dwarfs (https://arxiv.org/abs/1905.05900 ).pic.twitter.com/jLh0OIcqQD
1 reply 0 proslijeđenih tweetova 5 korisnika označava da im se sviđaPrikaži ovu nit -
Using the spectroscopic target photometry and parameters as a training set, we used machine learning to derive spectral types, temperatures, surface gravities, and metallicities for targets without a spectrum.pic.twitter.com/WTAc1dmvVG
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We used the Stefan-Boltzmann law to compute radii for AFGK stars, and absolute magnitude-radius relations from Mann+ 2015 for M dwarfs. In total we have new stellar parameters for 222,088 stars!pic.twitter.com/84nlRX5ZyI
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Using our new stellar parameters, we re-derived radii for 299 confirmed and 517 candidate planets and something magical happened: WE FOUND A DEFINITIVE PLANET RADIUS GAP FOR THE FIRST TIME IN A DATA SET OTHER THAN KEPLER!pic.twitter.com/IAlZkHbJhx
5 proslijeđenih tweetova 19 korisnika označava da im se sviđaPrikaži ovu nit -
This means that the Kepler result is not a fluke, and since K2 probes different regions in the Galaxy, this result is not exclusive to the Kepler field! Here's how the radius valley looks in relation to incident stellar flux (left), and compared Kepler (right).pic.twitter.com/zN5ka4wilO
2 proslijeđena tweeta 20 korisnika označava da im se sviđaPrikaži ovu nit -
This result would not have been easily identifiable without a uniform set of stellar parameters.pic.twitter.com/nw5qHdkTsB
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Many thanks to
@jonKzink,@aussiastronomer,@AstroDressing, David R. Ciardi, and@JoshuaSchlieder for their important contributions to this paper!pic.twitter.com/Tl9tmNSHyD1 reply 1 proslijeđeni tweet 2 korisnika označavaju da im se sviđaPrikaži ovu nit -
BUT WAIT.... THERE'S MORE! Go read "Scaling K2. II. Assembly of a Fully Automated C5 Planet Candidate Catalog Using EDI-Vetter", led by
@jonKzink! https://arxiv.org/abs/2001.11515 pic.twitter.com/I2nEfPQjmf1 reply 1 proslijeđeni tweet 3 korisnika označavaju da im se sviđaPrikaži ovu nit
K2 Planet Occurrence Rates, here we come...pic.twitter.com/wGCqZ8VHy8
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Odgovor korisniku/ci @kevinkhu
Great work!! Could have popped this on arxiv at the end of next week instead haha oh well, you'll have a paper citing this one in no time at all.
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