Twitter | Search | |
Vivien Parmentier
Dad and scientist. Associate professor studying exoplanets atmospheres.
1,137
Tweets
155
Following
500
Followers
Tweets
Vivien Parmentier 8h
We know how this works, no worried. The work you did is great. I just wish it was an A&A paper with more space for discussion :)
Reply Retweet Like
Vivien Parmentier 8h
Hi ! Thanks a lot for this clarification, so the values in table 3 *are* including epsilon uncertainties despite having eps. as a table entry ? I'm also curious how close to the no-extra-heat Bp the measurement gets? Are these Bp so close to 0 that it's not worth quantifying ?
Reply Retweet Like
Vivien Parmentier 12h
Sure, that's why I was wondering if native hawaiians have a framework to take these kind of decisions. If not all native voices count as equal, the polls are indeed useless. I understand that it's complicated, if it were simple we would not be in such a messy situation.
Reply Retweet Like
Vivien Parmentier 13h
Replying to @IBJIYONGI
Is there some native hawaiian political organisation able to measure the level of consensus and decide which level they want for the project to pursue or be stopped ? What do they say ?
Reply Retweet Like
Vivien Parmentier 19h
Replying to @Exotides
Well, Eq. 2 does have the stellar field hidden in the "fap" parameter, they say that it "depends on the ratio of stellar to planetary magnetic fields". fap is the fraction of the planet surface covered by the flux tube. It's unclear if the uncertainty in fap is propagated to Bp.
Reply Retweet Like
Vivien Parmentier 19h
Replying to @Exotides
What about atmospheric MHD instabilities from Rogers et al ?
Reply Retweet Like
Vivien Parmentier 19h
Replying to @Exotides
Here is the relevant paper, wasn't stellar corona but the planet's ionosphere itself shielding the radio wave emission !
Reply Retweet Like
Vivien Parmentier 21h
Replying to @ThorngrenDaniel
They might not be as strong as they appear in this paper. They still might be as strong, I'm just saying I'm not convinced we know either way for now. But with more data, better models we'll know one day :)
Reply Retweet Like
Vivien Parmentier 22h
Replying to @Exotides
I remember some papers showing that the stellar corona would shield the radio emission from us.
Reply Retweet Like
Vivien Parmentier 22h
Replying to @Exotides
Better MHD your code then ;)
Reply Retweet Like
Vivien Parmentier 22h
Replying to @ThorngrenDaniel
That being said, I agree there is a signal and that planetary magnetic field is needed. I would not be surprised that the derived values are *also* consistent with no extra heat inside the planet. I would have loved to see the no inflation points to be added in the figure.
Reply Retweet Like
Vivien Parmentier 22h
Replying to @ThorngrenDaniel
As for most of the exoplanet science, there's data that we fit with a model that's not really working and extract a parameter from the model with errorbars anyway.
Reply Retweet Like
Vivien Parmentier 22h
Replying to @ThorngrenDaniel
'cause the results are highly model dependent, the errorbars are probably underestimated (seems that error in epsilon is not taken into account), because there are a lot that is not understood yet (weired correction factor needed for the phoenix models).
Reply Retweet Like
Vivien Parmentier Jul 22
Replying to @ThorngrenDaniel
"measured"... I would argue for "detect" ...
Reply Retweet Like
Vivien Parmentier Jul 22
Replying to @simon_sat
It's the gut feeling you get when looking at it. I guess it's something you have to experience in real life to understand, not that I agree it's worth it !
Reply Retweet Like
Vivien Parmentier retweeted
Veronica Ohara Jul 21
Native Hawaiians support the Thirty Meter Telescope! Hear our voices!
Reply Retweet Like
Vivien Parmentier retweeted
〈 Berger | Dillon 〉 Jul 21
Replying to @InertialObservr
A "Cycloid" curve is one for which all objects take the 𝑠𝑎𝑚𝑒 amount of time to reach the bottom • If this seems counterintuitive, remember that 𝑚𝑔ℎ=½𝑚𝑣², and so objects starting higher will have a larger final velocity
Reply Retweet Like
Vivien Parmentier Jul 21
Replying to @ThorngrenDaniel
Maybe we should stop calling things after people ?
Reply Retweet Like
Vivien Parmentier retweeted
John Bredall Jul 19
(1/25) With the news of going national, I feel it's important to provide everyone with a bit of the history of astronomy on , where fits within this story, and the impact going forward. My goal here is simply to provide information for those interested.
Reply Retweet Like
Vivien Parmentier Jul 19
Reply Retweet Like