|
Pierre Kervella
@
PierreKervella
Meudon, France
|
|
Professional astronomer at Paris Observatory (France), head of the education department. I am working on Alpha Centauri, Cepheids and other types of stars.
|
|
|
519
Tweetovi
|
232
Pratim
|
407
Osobe koje vas prate
|
| Tweetovi |
| Pierre Kervella proslijedio/la je tweet | ||
|
Observatoire de Paris | PSL
@Obs_Paris
|
4. velj |
|
Fabienne Casoli élue Présidente de l’Observatoire de Paris - PSL
obspm.fr/fabienne-casol… @psl_univ pic.twitter.com/itemdPKLXZ
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
2. velj |
|
Unfortunately this is not possible to observe a full SED of Betelgeuse in "one shot" as the instruments (telescopes, detectors) are different depending on the wavelength domains.
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
2. velj |
|
Molecules and dust are certainly suspects, but this is a bit too early to be sure. The fainting of Betelgeuse is a very interesting puzzle, but not so easy to solve. We are collecting various data sets at the moment.
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Astronomy Magazine
@AstronomyMag
|
31. sij |
|
Henrietta Swan Leavitt, one of many women "computers" at Harvard University a century ago, unlocked the key to our three-dimensional universe using Cepheid variable stars. pst.cr/kmE4D
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
30. sij |
|
Yes we try! A few AAVSO observers do J and H, and we attempt in Meudon. But this is hard, as it is so enormously bright in the #infrared. The brightness of #Betelgeuse is stable is JHK, which points as an obscuration by circumstellar dust.
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
29. sij |
|
Thank you @lailalinke2 and @astrobites for this nice summary of a very interesting paper on the Hubble constant controversy twitter.com/astrobites/sta…
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Dr. Stella Kafka
@stellakafka
|
26. sij |
|
ok fine, the mean values are even lower, it dimmed a little more...
#Betelgeuse #BetelgeuseSaga pic.twitter.com/k8WytmYHHV
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Ethan Siegel
@StartsWithABang
|
23. sij |
|
This Is What We'll See When Betelgeuse Really Does Go Supernova
forbes.com/sites/startswi…
There are a lot of visual signals that will arrive, but the neutrinos come first, then there's a brilliant but brief spike in brightness, then a slow rise to maximum, a fall-off, and more.
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Didier Queloz
@DidierQueloz
|
21. sij |
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Brunier Serge
@10943_Brunier
|
23. sij |
|
Orion et la Licorne, mosaïque de deux séries de poses de 5 minutes, Nikon D810 A, filtre STC et 50 mm à 5.6. Montage vite fait, mais ça donne envie de la refaire sérieusement... pic.twitter.com/0v5RzlPv3d
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Didier Queloz
@DidierQueloz
|
20. sij |
|
Elon Musk, SpaceX Unveil Latest Starlink Plans, Creating An Astronomical Emergency by @StartsWithABang in @startswithabang link.medium.com/Td9TSpNEo3
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Brunier Serge
@10943_Brunier
|
19. sij |
|
Bételgeuse hier soir, dans le ciel brumeux de la banlieue parisienne… Jusqu'ici tout va bien : elle est toujours là. Elle est même sacrément impressionnante, malgré sa chute de luminosité, les gens qui habitent dans les parages doivent pas faire les malins, en ce moment… 😬😉🤓 pic.twitter.com/yTHQ4Bi44m
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
ASAS-SN
@SuperASASSN
|
16. sij |
|
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Didier Queloz
@DidierQueloz
|
16. sij |
|
Open call to American lawyers stargazers to look at the possible breach of law. Please spread the words. Let’s save our sky! twitter.com/sciam/status/1…
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
17. sij |
|
The core of the star (in red) rotates 50% faster than the envelope (in green). The rotation period of #Altair is less than 8 hours, compared to one month for the Sun! This explains its extreme flattening. The @AandA_journal paper is freely available here: aanda.org/component/arti…
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
17. sij |
|
A new work led by Kevin Bouchaud presents a realistic model of the internal rotation of the star #Altair! It relies on interferometric @ESO #GRAVITY data and is just published in @AandA_journal. Image: Altair compared to the Sun (PR in French) insu.cnrs.fr/fr/cnrsinfo/en… pic.twitter.com/YeLxaI4IlE
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Dr. Gerard van Belle
@FringeDoctor
|
15. sij |
|
And here comes #Starlink version 2.0 - higher orbits, so visible all night long.
Sky pollution isn't just for dawn and dusk anymore! twitter.com/OneWebSatellit…
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
14. sij |
|
J'ai aussi eu le plaisir de parler de #Betelgeuse avec Sophie Bécherel @kepler75 donc peut-être serons nous tous les deux diffusés dans #le79Inter ? 🙂
|
||
|
|
||
|
Pierre Kervella
@PierreKervella
|
13. sij |
|
Hi Leonard, yes with several colleagues we are monitoring our old friend #Betelgeuse using a variety of facilities. I could certainly make a short overview of what we know from IR observations at the @ESO workshop, but I am not sure that we will have already analyzed the new data
|
||
|
|
||
| Pierre Kervella proslijedio/la je tweet | ||
|
Nature Astronomy
@NatureAstronomy
|
13. sij |
|
Joint spectroastrometry and reverberation mapping provide a novel measurement of the distance to the active galaxy nucleus 3C273 and hence the Hubble Constant. Wang et al.: nature.com/articles/s4155… pic.twitter.com/X9rd4b7dZj
|
||
|
|
||