Les Québecoises have taken a second look at TOI-1452. That's a TESS-telescope, transits-a-star object-of-interest. The object is in a binary; another, smaller star orbits their barycentre at 97 AU, whence it doesn't illuminate the inner-system much.
The article does well explaining why-not "TOI-1452 Ab". At ~100 light years away this is a high parallax system as may be read here, currently 32.782 ± 0.014 mas for TOI-1452 and 32.791 ± 0.014 mas (closer) for the other one which they call "TIC 420112587". The data are from Gaia EDR3, so the early-release.
As a transit TOI-1452's planet has a disc, therefore a volume. At 4.82 ± 1.30 M⊕ and 1.672 ± 0.071 R⊕, density is considered low. This might be accounted for by an opaque outer layer such as methane or water clouds might provide. The article is thinking: water. The paper admits low-density crust or even a subUranus helium envelope might also suffice. For that, both the article and the paper suggest this world as a Webb 'scope candidate.
Well... maybe. JWST has other priorities. 33 mas parallax is pretty low especially where another star is swamping the readings. I still want 55 Cancri, and Wolf 437 and maybe Gliese 832. Assuming we cannot simply hoist up new 'scopes.
No comments:
Post a Comment