Drew Weisserman
@drewweisserman.bsky.social
McMaster Astronomy MSc '25. send me pictures of your pets or I will steal them. he/him 🏳️🌈
check out my research: https://drewweis.github.io/
check out my research: https://drewweis.github.io/
(example of what that looks like, for reference)
August 28, 2025 at 2:39 AM
(example of what that looks like, for reference)
Finally, we make a little toy model to calculate the rate of HJMDs vs. hot Jupiters around Sun-like stars, too. We find that KL migration alone can fully account for the rate of HJMDs we see, if M dwarfs are better at damping the planets this migration excites (which is supported by theory.)
August 19, 2025 at 3:38 PM
Finally, we make a little toy model to calculate the rate of HJMDs vs. hot Jupiters around Sun-like stars, too. We find that KL migration alone can fully account for the rate of HJMDs we see, if M dwarfs are better at damping the planets this migration excites (which is supported by theory.)
So we check if that damping is feasible for these stars. Both have binary companions that could drive that high-eccentricity migration in the first place via Kozai-Lidov (KL) migration. Astrometric measurements from Gaia suggest these systems are aligned that KL migration is feasible, too.
August 19, 2025 at 3:38 PM
So we check if that damping is feasible for these stars. Both have binary companions that could drive that high-eccentricity migration in the first place via Kozai-Lidov (KL) migration. Astrometric measurements from Gaia suggest these systems are aligned that KL migration is feasible, too.
This is not hugely unexpected: the 1st such measurement found the same result. But what does it mean?
Well-aligned orbits COULD result from dynamically cold migration, or it could result from dynamically hotter high-eccentricity migration that was then damped away by the star's tides.
Well-aligned orbits COULD result from dynamically cold migration, or it could result from dynamically hotter high-eccentricity migration that was then damped away by the star's tides.
August 19, 2025 at 3:38 PM
This is not hugely unexpected: the 1st such measurement found the same result. But what does it mean?
Well-aligned orbits COULD result from dynamically cold migration, or it could result from dynamically hotter high-eccentricity migration that was then damped away by the star's tides.
Well-aligned orbits COULD result from dynamically cold migration, or it could result from dynamically hotter high-eccentricity migration that was then damped away by the star's tides.
In this paper, we use the MAROON-X spectrograph to measure this effect for two HJMDs, TOI-3714 b and TOI-5293 A b. These are just the 2nd and 3rd ever measurements of this kind for HJMDs!
And, spoilers... we find out these planets' orbits are well-aligned! 🎉
And, spoilers... we find out these planets' orbits are well-aligned! 🎉
August 19, 2025 at 3:38 PM
In this paper, we use the MAROON-X spectrograph to measure this effect for two HJMDs, TOI-3714 b and TOI-5293 A b. These are just the 2nd and 3rd ever measurements of this kind for HJMDs!
And, spoilers... we find out these planets' orbits are well-aligned! 🎉
And, spoilers... we find out these planets' orbits are well-aligned! 🎉
We can get a good sense of how a planet formed by observing the Rossiter-McLaughlin effect. As a planet passes in front of its star, it blocks parts of the star moving towards/away from you (which are bluer/redder, respectively), making the star appear redder or bluer for a time.
August 19, 2025 at 3:38 PM
We can get a good sense of how a planet formed by observing the Rossiter-McLaughlin effect. As a planet passes in front of its star, it blocks parts of the star moving towards/away from you (which are bluer/redder, respectively), making the star appear redder or bluer for a time.
So, hot Jupiters are very close-in (P < 10d), big, gaseous planet. We see these sorts of planets around a lot of stars, and there's a lot of debate over how they form!
Some evidence suggests they can form close-in, while more evidence finds that they form far away from their stars and migrate in.
Some evidence suggests they can form close-in, while more evidence finds that they form far away from their stars and migrate in.
August 19, 2025 at 3:38 PM
So, hot Jupiters are very close-in (P < 10d), big, gaseous planet. We see these sorts of planets around a lot of stars, and there's a lot of debate over how they form!
Some evidence suggests they can form close-in, while more evidence finds that they form far away from their stars and migrate in.
Some evidence suggests they can form close-in, while more evidence finds that they form far away from their stars and migrate in.
I assume this is a typo on page 145, but I'm glad to see the Juno spacecraft finally getting the 27 trillion dollars it deserves
July 18, 2025 at 5:05 PM
I assume this is a typo on page 145, but I'm glad to see the Juno spacecraft finally getting the 27 trillion dollars it deserves
Didn’t get great pics, but amazing turnout in Toronto!! 750-1000 people, half Americans and half Canadians.
June 14, 2025 at 9:39 PM
Didn’t get great pics, but amazing turnout in Toronto!! 750-1000 people, half Americans and half Canadians.
This isn’t someone trying to change the party, this is someone changing himself.
June 3, 2025 at 8:58 PM
This isn’t someone trying to change the party, this is someone changing himself.
someone unfollowed, you're safe
May 23, 2025 at 12:33 AM
someone unfollowed, you're safe
I don't even LIKE poppy seed hamantaschens, why did I make so many of them
March 14, 2025 at 4:41 PM
I don't even LIKE poppy seed hamantaschens, why did I make so many of them
A second like has hit Phil Murphy’s post
February 19, 2025 at 8:26 PM
A second like has hit Phil Murphy’s post
Hell of a ratio
February 19, 2025 at 8:24 PM
Hell of a ratio
It wouldn't! If it hits the Earth, we know WHERE it would hit: somewhere on this red line. Big cities lie along this line (Dhaka, Bogota, and Lagos, for example), but a lot of empty space, too, and Yellowstone is nowhere near.
February 7, 2025 at 5:56 PM
It wouldn't! If it hits the Earth, we know WHERE it would hit: somewhere on this red line. Big cities lie along this line (Dhaka, Bogota, and Lagos, for example), but a lot of empty space, too, and Yellowstone is nowhere near.
they're going to shapeshift the swifties, watch out
January 26, 2025 at 8:45 PM
they're going to shapeshift the swifties, watch out