| Records |
| Author |
Ahrer, E.M.; Alderson, L.; Batalha, N.M.; Batalha, N.E.; Bean, J.L.; Beatty, T.G.; Bell, T.J.; Benneke, B.; Berta-Thompson, Z.K.; Carter, A.L.; Crossfield, I.J.M.; Espinoza, N.; Feinstein, A.D.; Fortney, J.J.; Gibson, N.P.; Goyal, J.M.; Kempton, E.M.R.; Kirk, J.; Kreidberg, L.; Lopez-Morales, M.; Line, M.R.; Lothringer, J.D.; Moran, S.E.; Mukherjee, S.; Ohno, K.; Parmentier, V.; Piaulet, C.; Rustamkulov, Z.; Schlawin, E.; Sing, D.K.; Stevenson, K.B.; Wakeford, H.R.; Allen, N.H.; Birkmann, S.M.; Brande, J.; Crouzet, N.; Cubillos, P.E.; Damiano, M.; Desert, J.M.; Gao, P.; Harrington, J.; Hu, R.Y.; Kendrew, S.; Knutson, H.A.; Lagage, P.O.; Leconte, J.; Lendl, M.; MacDonald, R.J.; May, E.M.; Miguel, Y.; Molaverdikhani, K.; Moses, J.I.; Murray, C.A.; Nehring, M.; Nikolov, N.K.; de la Roche, D.J.M.P.D.; Radica, M.; Roy, P.A.; Stassun, K.G.; Taylor, J.; Waalkes, W.C.; Wachiraphan, P.; Welbanks, L.; Wheatley, P.J.; Aggarwal, K.; Alam, M.K.; Banerjee, A.; Barstow, J.K.; Blecic, J.; Casewell, S.L.; Changeat, Q.; Chubb, K.L.; Colon, K.D.; Coulombe, L.P.; Daylan, T.; De Val-Borro, M.; Decin, L.; Dos Santos, L.A.; Flagg, L.; France, K.; Fu, G.W.; Munoz, A.G.; Gizis, J.E.; Glidden, A.; Grant, D.; Heng, K.; Henning, T.; Hong, Y.C.; Inglis, J.; Iro, N.; Kataria, T.; Komacek, T.D.; Krick, J.E.; Lee, E.K.H.; Lewis, N.K.; Lillo-Box, J.; Lustig-Yaeger, J.; Mancini, L.; Mandell, A.M.; Mansfield, M.; Marley, M.S.; Mikal-Evans, T.; Morello, G.; Nixon, M.C.; Ceballos, K.O.; Piette, A.A.A.; Powell, D.; Rackham, B.V.; Ramos-Rosado, L.; Rauscher, E.; Redfield, S.; Rogers, L.K.; Roman, M.T.; Roudier, G.M.; Scarsdale, N.; Shkolnik, E.L.; Southworth, J.; Spake, J.J.; Steinrueck, M.E.; Tan, X.Y.; Teske, J.K.; Tremblin, P.; Tsai, S.M.; Tucker, G.S.; Turner, J.D.; Valenti, J.A.; Venot, O.; Waldmann, I.P.; Wallack, N.L.; Zhang, X.; Zieba, S. |
| Title |
Identification of carbon dioxide in an exoplanet atmosphere |
Type |
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| Year |
2023 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
Early Access |
Issue |
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Pages |
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| Keywords |
GIANT PLANETS; BROWN DWARFS; LINE LISTS; H2O; SKY |
| Abstract |
Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the metal enrichment (that is, elements heavier than helium, also called 'metallicity')(1-3), and thus the formation processes of the primary atmospheres of hot gas giants(4-6). It is also one of the most promising species to detect in the secondary atmospheres of terrestrial exoplanets(7-9). Previous photometric measurements of transiting planets with the Spitzer Space Telescope have given hints of the presence of CO2, but have not yielded definitive detections owing to the lack of unambiguous spectroscopic identification(10-12). Here we present the detection of CO2 in the atmosphere of the gas giant exoplanet WASP-39b from transmission spectroscopy observations obtained with JWST as part of the Early Release Science programme(13,14). The data used in this study span 3.0-5.5micrometres in wavelength and show a prominent CO2 absorption feature at 4.3micrometres (26-sigma significance). The overall spectrum is well matched by one-dimensional, ten-times solar metallicity models that assume radiative-convective-thermochemical equilibrium and have moderate cloud opacity. These models predict that the atmosphere should have water, carbon monoxide and hydrogen sulfide in addition to CO2, but little methane. Furthermore, we also tentatively detect a small absorption feature near 4.0micrometres that is not reproduced by these models. |
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| ISSN |
0028-0836 |
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| Notes |
WOS:000927885000001 |
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| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1760 |
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| Author |
Feinstein, A.D.; Radica, M.; Welbanks, L.; Murray, C.A.; Ohno, K.; Coulombe, L.P.; Espinoza, N.; Bean, J.L.; Teske, J.K.; Benneke, B.; Line, M.R.; Rustamkulov, Z.; Saba, A.; Tsiaras, A.; Barstow, J.K.; Fortney, J.J.; Gao, P.T.; Knutson, H.A.; MacDonald, R.J.; Mikal-Evans, T.; Rackham, B.V.; Taylor, J.; Parmentier, V.; Batalha, N.M.; Berta-Thompson, Z.K.; Carter, A.L.; Changeat, Q.; dos Santos, L.A.; Gibson, N.P.; Goyal, J.M.; Kreidberg, L.; Lopez-Morales, M.; Lothringer, J.D.; Miguel, Y.; Molaverdikhani, K.; Moran, S.E.; Morello, G.; Mukherjee, S.; Sing, D,.K.; Stevenson, K.B.; Wakeford, H.R.; Ahrer, E.M.; Alam, M.K.; Alderson, L.; Allen, N.H.; Batalha, N.E.; Bell, T.J.; Blecic, J.; Brande, J.; Caceres, C.; Casewell, S.L.; Chubb, K.L.; Crossfield, I.J.M.; Crouzet, N.; Cubillos, P.E.; Decin, L.; Desert, J.M.; Harrington, J.; Heng, K.V.; Henning, T.; Iro, N.; Kempton, E.M.R.; Kendrew, S.; Kirk, J.; Krick, J.; Lagage, P.O.; Lendl, M.; Mancini, L.; Mansfield, M.; May, E.M.; Mayne, N.J.; Nikolov, N.K.; Palle, E.; de la Roche, D.J.M.P.D.; Piaulet, C.; Powell, D.; Redfield, S.; Rogers, L.K.; Roman, M.T.; Roy, P.A.; Nixon, M.C.; Schlawin, E.; Tan, X.Y.; Tremblin, P.; Turner, J.D.; Venot, O.; Waalkes, W.C.; Wheatley, P.J.; Zhang, X. |
| Title |
Early Release Science of the exoplanet WASP-39b with JWST NIRISS |
Type |
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| Year |
2023 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
Early Access |
Issue |
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Pages |
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| Keywords |
EXOMOL LINE LISTS; THERMAL STRUCTURE; MODEL; ABUNDANCES; ATMOSPHERE; RETRIEVAL; SCATTERING; EFFICIENT; SPECTRUM; METHANE |
| Abstract |
The Saturn-mass exoplanet WASP-39b has been the subject of extensive efforts to determine its atmospheric properties using transmission spectroscopy(1-4). However, these efforts have been hampered by modelling degeneracies between composition and cloud properties that are caused by limited data quality(5-9). Here we present the transmission spectrum of WASP-39b obtained using the Single-Object Slitless Spectroscopy (SOSS) mode of the Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument on the JWST. This spectrum spans 0.6-2.8 mu m in wavelength and shows several water-absorption bands, the potassium resonance doublet and signatures of clouds. The precision and broad wavelength coverage of NIRISS/SOSS allows us to break model degeneracies between cloud properties and the atmospheric composition of WASP-39b, favouring a heavy-element enhancement ('metallicity') of about 10-30 times the solar value, a sub-solar carbon-to-oxygen (C/O) ratio and a solar-to-super-solar potassium-to-oxygen (K/O) ratio. The observations are also best explained by wavelength-dependent, non-grey clouds with inhomogeneous coverageof the planet's terminator. |
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0028-0836 |
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WOS:000951197700001 |
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| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1800 |
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| Author |
Kirk, J.; Rackham, B.V.; MacDonald, R.J.; Lopez-Morales, M.; Espinoza, N.; Lendl, M.; Wilson, J.; D.J.; Wheatley, P.J.; Skillen, I.; Apai, D.; Bixel, A.; Gibson, N.P.; Jordan, A.; Lewis, N.K.; Louden, T.; McGruder, C.D.; Nikolov, N.; Rodler, F.; Weaver, I.C. |
| Title |
ACCESS and LRG-BEASTS: A Precise New Optical Transmission Spectrum of the Ultrahot Jupiter WASP-103b |
Type |
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| Year |
2021 |
Publication |
Astronomical Journal |
Abbreviated Journal |
Astron. J. |
| Volume |
162 |
Issue |
1 |
Pages |
34 |
| Keywords |
GAS-GIANT EXOPLANET; HOT JUPITERS; ATMOSPHERES; TRANSIT; PLANET; EFFICIENT; SPECTROSCOPY; RETRIEVAL; CHEMISTRY; EXPLAIN |
| Abstract |
We present a new ground-based optical transmission spectrum of the ultrahot Jupiter WASP-103b (Teq=2484 |
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0004-6256 |
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WOS:000667942900001 |
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UAI @ alexi.delcanto @ |
Serial |
1434 |
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Sedaghati, E.; MacDonald, R.J.; Casasayas-Barris, N.; Hoeijmakers, H.J.; Boffin, H.M.J.; Rodler, F.; Brahm, R.; Jones, M.; Sanchez-Lopez, A.; Carleo, I.; Figueira, P.; Mehner, A.; Lopez-Puertas, M. |
| Title |
A spectral survey of WASP-19b with ESPRESSO |
Type |
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| Year |
2021 |
Publication |
Monthly Notices Of The Royal Astronomical Society |
Abbreviated Journal |
Mon. Not. Roy. Astron. Soc. |
| Volume |
505 |
Issue |
1 |
Pages |
435-458 |
| Keywords |
methods: data analysis; techniques: spectroscopic; planets and satellites: atmospheres; planets and satellites: individual: WASP-19b; stars: activity; stars: individual: WASP-19 |
| Abstract |
High-resolution precision spectroscopy provides a multitude of robust techniques for probing exoplanetary atmospheres. We present multiple VLT/ESPRESSO transit observations of the hot-Jupiter exoplanet WASP-19b with previously published but disputed atmospheric features from low resolution studies. Through spectral synthesis and modelling of the Rossiter-McLaughlin (RM) effect we calculate stellar, orbital and physical parameters for the system. From narrow-band spectroscopy we do not detect any of Hi, Fei, Mgi, Cai, Nai, and Ki neutral species, placing upper limits on their line contrasts. Through cross-correlation analyses with atmospheric models, we do not detect Fei and place a 3 sigma upper limit of on its mass fraction, from injection and retrieval. We show the inability to detect the presence of H2O for known abundances, owing to lack of strong absorption bands, as well as relatively low S/N ratio. We detect a barely significant peak (3.02 +/- 0.15 sigma) in the cross-correlation map for TiO, consistent with the sub-solar abundance previously reported. This is merely a hint for the presence of TiO and does not constitute a confirmation. However, we do confirm the presence of previously observed enhanced scattering towards blue wavelengths, through chromatic RM measurements, pointing to a hazy atmosphere. We finally present a reanalysis of low-resolution transmission spectra of this exoplanet, concluding that unocculted starspots alone cannot explain previously detected features. Our reanalysis of the FORS2 spectra of WASP-19b finds a similar to 100x sub-solar TiO abundance, precisely constrained to , consistent with the TiO hint from ESPRESSO. We present plausible paths to reconciliation with other seemingly contradicting results. |
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0035-8711 |
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WOS:000671453100031 |
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UAI @ alexi.delcanto @ |
Serial |
1438 |
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