02/02/2022

The impact of faculae on the radius determination of exoplanets: The case of the M-star GJ 1214

“Faculae can pose a problem if they are inhomogeneously distributed on the stellar surface. Using the eclipse mapping method, we study the distribution of the faculae on the surface of GJ 1214 using the Ca II H&K lines as tracers. In order to assess the homogeneity of the distribution in a quantitative way, we introduce the inhomogeneity factor IHF.”, said Eike Guenther (Thueringer Landessternwarte Tautenburg).

GJ 1214 is a red dwarf 47.8 light-years away from Earth. It has about 15% of the Sun’s mass and is much fainter than it. The effective temperature of GJ 1214 is about 3000 K. At a distance of about 0.014 AU it orbits GJ 1214 b, an exoplanet having the mass and diameter of a super-Earth.

Read more here.

December 2024
H. Yu, Z. Garai, M. Cretignier, G. M. Szabó, S. Aigrain, D. Gandolfi, E. M. Bryant, A. C. M. Correia, B. Klein, A. Brandeker, J. E. Owen, M. N. Günther, J. N. Winn, A. Heitzmann, H. M. Cegla, T. G. Wilson, S. Gill, L. Kriskovics, O. Barragán, A. Boldog, L. D. Nielsen, N. Billot, M. Lafarga, A. Meech, Y. Alibert

A possible misaligned orbit for the young planet AU Mic c

bib

@article{Yu_2024,
title={A possible misaligned orbit for the young planet AU Mic c},
volume={536},
ISSN={1365-2966},
url={http://dx.doi.org/10.1093/mnras/stae2655},
DOI={10.1093/mnras/stae2655},
number={3},
journal={Monthly Notices of the Royal Astronomical Society},
publisher={Oxford University Press (OUP)},
author={Yu, H and Garai, Z and Cretignier, M and Szabó, Gy M and Aigrain, S and Gandolfi, D and Bryant, E M and Correia, A C M and Klein, B and Brandeker, A and Owen, J E and Günther, M N and Winn, J N and Heitzmann, A and Cegla, H M and Wilson, T G and Gill, S and Kriskovics, L and Barragán, O and Boldog, A and Nielsen, L D and Billot, N and Lafarga, M and Meech, A and Alibert, Y and Alonso, R and Bárczy, T and Barrado, D and Barros, S C C and Baumjohann, W and Bayliss, D and Benz, W and Bergomi, M and Borsato, L and Broeg, C and Cameron, A Collier and Csizmadia, Sz and Cubillos, P E and Davies, M B and Deleuil, M and Deline, A and Demangeon, O D S and Demory, B -O and Derekas, A and Doyle, L and Edwards, B and Egger, J A and Ehrenreich, D and Erikson, A and Fortier, A and Fossati, L and Fridlund, M and Gazeas, K and Gillon, M and Güdel, M and Helling, Ch and Isaak, K G and Kiss, L L and Korth, J and Lam, K W F and Laskar, J and Lecavelier des Etangs, A and Lendl, M and Magrin, D and Maxted, P F L and McCormac, J and Merín, B and Mordasini, C and Nascimbeni, V and O’Brien, S M and Olofsson, G and Ottensamer, R and Pagano, I and Pallé, E and Peter, G and Piazza, D and Piotto, G and Pollacco, D and Queloz, D and Ragazzoni, R and Rando, N and Rauer, H and Ribas, I and Santos, N C and Scandariato, G and Ségransan, D and Simon, A E and Smith, A M S and Sousa, S G and Southworth, R and Stalport, M and Steinberger, M and Sulis, S and Udry, S and Ulmer, B and Ulmer-Moll, S and Van Grootel, V and Venturini, J and Villaver, E and Walton, N A and Wheatley, P J},
year={2024},
month=nov, pages={2046–2063} }

DOI arXiv
December 2024
S. Czesla, F. Nail, A. Lavail, D. Cont, L. Nortmann, F. Lesjak, M. Rengel, L. Boldt-Christmas, D. Shulyak, U. Seemann, P. C. Schneider, A. P. Hatzes, O. Kochukhov, N. Piskunov, A. Reiners, D. J. Wilson, F. Yan

The overflowing atmosphere of WASP-121 b: High-resolution He I λ10833 transmission spectroscopy with VLT/CRIRES+

DOI
December 2024
A. M. S. Smith, Sz. Csizmadia, V. Van Grootel, M. Lendl, C. M. Persson, G. Olofsson, D. Ehrenreich, M. N. Günther, A. Heitzmann, S. C. C. Barros, A. Bonfanti, A. Brandeker, J. Cabrera, O. D. S. Demangeon, L. Fossati, J. -V. Harre, M. J. Hooton, S. Hoyer, S. Kálmán, S. Salmon, S. G. Sousa, G. M. Szabó, T. G. Wilson, Y. Alibert, R. Alonso, J. Asquier,, T. Bárczy, D. Barrado, W. Baumjohann, W. Benz, N. Billot, L. Borsato, C. Broeg, A. Collier Cameron, A. C. M. Correia, P. E. Cubillos, M. B. Davies, M. Deleuil, A. Deline, B. O. Demory, A. Derekas, B. Edwards, J. A. Egger, A. Erikson, A. Fortier, M. C. V. Fridlund, D. Gandolfi, K. Gazeas, K. W. F. Lam, D. Pollacco, N. Rando, H. Rauer, J. Venturini, I. Walter, N. A. Walton, S. Wolf

CHEOPS observations confirm nodal precession in the WASP-33 system

bib

@misc{smith2024cheopsobservationsconfirmnodal,
title={CHEOPS observations confirm nodal precession in the WASP-33 system},
author={A. M. S. Smith and Sz. Csizmadia and V. Van Grootel and M. Lendl and C. M. Persson and G. Olofsson and D. Ehrenreich and M. N. Günther and A. Heitzmann and S. C. C. Barros and A. Bonfanti and A. Brandeker and J. Cabrera and O. D. S. Demangeon and L. Fossati and J. -V. Harre and M. J. Hooton and S. Hoyer and Sz. Kalman and S. Salmon and S. G. Sousa and Gy. M. Szabó and T. G. Wilson and Y. Alibert and R. Alonso and J. Asquier and T. Bárczy and D. Barrado and W. Baumjohann and W. Benz and N. Billot and L. Borsato and C. Broeg and A. Collier Cameron and A. C. M. Correia and P. E. Cubillos and M. B. Davies and M. Deleuil and A. Deline and B. -O. Demory and A. Derekas and B. Edwards and J. A. Egger and A. Erikson and A. Fortier and M. Fridlund and D. Gandolfi and K. Gazeas and M. Gillon and M. Güdel and J. Hasiba and Ch. Helling and K. G. Isaak and L. L. Kiss and J. Korth and K. W. F. Lam and J. Laskar and A. Lecavelier des Etangs and D. Magrin and P. F. L. Maxted and B. Merín and C. Mordasini and V. Nascimbeni and R. Ottensamer and I. Pagano and E. Pallé and G. Peter and D. Piazza and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas and N. C. Santos and G. Scandariato and D. Ségransan and A. E. Simon and M. Stalport and S. Sulis and S. Udry and S. Ulmer-Moll and J. Venturini and E. Villaver and V. Viotto and I. Walter and N. A. Walton and S. Wolf},
year={2024},
eprint={2412.08557},
archivePrefix={arXiv},
primaryClass={astro-ph.EP},
url={https://arxiv.org/abs/2412.08557},
}

arXiv