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A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs : Color validation of TOI-4479b and TOI-2081b

Esparza-Borges, E. ; Parviainen, H. ; Murgas, F. ; Pallé, E. ; Maas, A. ; Morello, G. ; Zapatero-Osorio, M. R. ; Barkaoui, K. ; Narita, N. and Fukui, A. , et al. (2022) In Astronomy and Astrophysics 666.
Abstract

Aims. We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.


Methods. We jointly analyzed space (TESS mission) and
ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves
using our multicolor photometry transit analysis pipeline. This allowed
us to compute contamination limits for both candidates and validate them
as planet-sized companions.


Results. We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82−0.63+0.65 R⊕) and TOI-2081b to be a super-Earth-sized planet (Rp =... (More)

Aims. We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.


Methods. We jointly analyzed space (TESS mission) and
ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves
using our multicolor photometry transit analysis pipeline. This allowed
us to compute contamination limits for both candidates and validate them
as planet-sized companions.


Results. We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82−0.63+0.65 R⊕) and TOI-2081b to be a super-Earth-sized planet (Rp = 2.04−0.54+0.50 R⊕). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890−0.00001+0.00002
days, lies within the Neptune desert and is in fact the largest nearly
ultra-short period planet around an M dwarf known to date.


Conclusions. These results make TOI-4479b rare among
the currently known exoplanet population of M dwarf stars and an
especially interesting target for spectroscopic follow-up and future
studies of planet formation and evolution.

(Less)
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type
Contribution to journal
publication status
published
subject
keywords
Methods: observational, Planets and satellites: detection, Planets and satellites: general, Planets and satellites: individual: TOI-2081b, Planets and satellites: individual: TOI-4479b, Techniques: photometric
in
Astronomy and Astrophysics
volume
666
article number
A10
pages
13 pages
publisher
EDP Sciences
external identifiers
  • scopus:85141010423
ISSN
0004-6361
DOI
10.1051/0004-6361/202243731
language
English
LU publication?
no
additional info
Publisher Copyright: ©
id
79dbd3e6-3e12-49a3-8c06-09d90e8c0ef0
date added to LUP
2023-01-17 09:10:19
date last changed
2023-02-11 17:01:21
@article{79dbd3e6-3e12-49a3-8c06-09d90e8c0ef0,
  abstract     = {{<p><i>Aims<b>.</b></i> We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.</p><br>
<p><i>Methods<b>.</b></i> We jointly analyzed space (TESS mission) and <br>
ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves <br>
using our multicolor photometry transit analysis pipeline. This allowed <br>
us to compute contamination limits for both candidates and validate them<br>
 as planet-sized companions.</p><br>
<p><i>Results<b>.</b></i> We found TOI-4479b to be a sub-Neptune-sized planet (<i>R</i><sub>p</sub> = 2.82<sub>−0.63</sub><sup>+0.65</sup> <i>R</i><sub>⊕</sub>) and TOI-2081b to be a super-Earth-sized planet (<i>R</i><sub>p</sub> = 2.04<sub>−0.54</sub><sup>+0.50</sup> <i>R</i><sub>⊕</sub>). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890<sub>−0.00001</sub><sup>+0.00002</sup><br>
 days, lies within the Neptune desert and is in fact the largest nearly <br>
ultra-short period planet around an M dwarf known to date.</p><br>
<p><i>Conclusions<b>.</b></i> These results make TOI-4479b rare among <br>
the currently known exoplanet population of M dwarf stars and an <br>
especially interesting target for spectroscopic follow-up and future <br>
studies of planet formation and evolution.</p>}},
  author       = {{Esparza-Borges, E. and Parviainen, H. and Murgas, F. and Pallé, E. and Maas, A. and Morello, G. and Zapatero-Osorio, M. R. and Barkaoui, K. and Narita, N. and Fukui, A. and Casasayas-Barris, N. and Oshagh, M. and Crouzet, N. and Galán, D. and Fernández, G. E. and Kagetani, T. and Kawauchi, K. and Kodama, T. and Korth, J. and Kusakabe, N. and Laza-Ramos, A. and Luque, R. and Livingston, J. and Madrigal-Aguado, A. and Mori, M. and Orell-Miquel, J. and Puig-Subirà, M. and Stangret, M. and Terada, Y. and Watanabe, N. and Zou, Y. and Baliga Savel, A. and Belinski, A. A. and Collins, K. and Dressing, C. D. and Giacalone, S. and Gill, H. and Goliguzova, M. V. and Ikoma, M. and Jenkins, J. M. and Tamura, M. and Twicken, J. D. and Ricker, G. R. and Schwarz, R. P. and Seager, S. and Shporer, A. and Vanderspek, R. and Winn, J.}},
  issn         = {{0004-6361}},
  keywords     = {{Methods: observational; Planets and satellites: detection; Planets and satellites: general; Planets and satellites: individual: TOI-2081b; Planets and satellites: individual: TOI-4479b; Techniques: photometric}},
  language     = {{eng}},
  month        = {{10}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs : Color validation of TOI-4479b and TOI-2081b}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/202243731}},
  doi          = {{10.1051/0004-6361/202243731}},
  volume       = {{666}},
  year         = {{2022}},
}