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MASCARA

Coordinates:29°15′25″S70°44′16″W/ 29.257078°S 70.737822°W/-29.257078; -70.737822
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MASCARA
The five cameras that form the MASCARA system installed at La Silla Observatory
Alternative namesMulti-site All-Sky CAmeRAEdit this at Wikidata
Part ofLa Silla Observatory
Roque de los Muchachos ObservatoryEdit this on Wikidata
Location(s)Spain, ChileEdit this at Wikidata
Coordinates29°15′25″S70°44′16″W/ 29.257078°S 70.737822°W/-29.257078; -70.737822Edit this at Wikidata
Telescope styleoptical telescopeEdit this on Wikidata
Websitemascara1.strw.leidenuniv.nlEdit this at Wikidata
Related media on Commons
[edit on Wikidata]
The compact housing of MASCARA atLa Silla Observatory

MASCARA(Multi-site All-Sky CAmeRA) is anexoplanetexperiment byLeiden University.It has two stations, one in eachhemisphere,each of which use cameras to make shortexposurephotographs of most of the visible sky[1]to observe stars to amagnitudeof 8.4.[2]The Northern Hemisphere station atRoque de los Muchachos Observatory,La Palma,started observations in February 2015. The Southern Hemisphere station atLa Silla Observatory,Chile, sawfirst lightin July 2017.[3]

MASCARA-1b

[edit]
Main article:MASCARA-1b

On 17 July 2017, the discovery ofMASCARA-1b,a confirmedsuperjovianexoplanet with a mass 3.7MJ,was reported by the survey team. MASCARA-1b is ahot Jupitertransiting its parentA-type star;its orbit is misaligned with the star's rotation.[4]The planet was found unusually reflective for hot Jupiter with the measured geometric albedo of 0.171+0.066
−0.068and dayside temperature of 3062+66
−68K.[5]Attempts to spectroscopically characterize its composition were failing as in 2022 due to relatively high planetary surface gravity resulting in compact atmosphere.[6]

MASCARA-2b

[edit]
Main article:KELT-20b

A second planet,MASCARA-2b,also known asKELT-20b,was also announced in 2017. It is a hot Jupiter orbiting an A-type star.[7]Thecarbon monoxide,steam[8][9]and neutral iron[10]detection in the atmosphere ofMASCARA-2bwas announced in 2022.

MASCARA-4b

[edit]
Main article:HD 85628 Ab

A planet MASCARA-4b (also known asHD 85628 Ab) discovery was announced in 2019. It is a hot Jupiter on retrograde and slightly eccentric orbit.[11]The planet is unusually reflective for a hot Jupiter.[12]Hydrogen, sodium, magnesium, calcium and iron emission from planetary atmosphere was detected.[13]

MASCARA-5b

[edit]
Main article:TOI-1431 b

In 2021, a planet MASCARA-5b (more commonly known asTOI-1431 b), is anUltra-hot Jupiter.Its dayside temperature is 2,700 K (2,427 °C), making it hotter than 40% of stars in our galaxy.[14]The nightside temperature is 2,600 K (2,300 °C).[15]

List of discovered exoplanets

[edit]
Star Constellation Right
ascension 		Declination App.
mag. 		Distance(ly) Spectral
type 		Planet Mass
(MJ) 		Radius
(RJ) 		Orbital
period
(d) 		Semimajor
axis
(AU) 		Orbital
eccentricity 		Inclination
(°) 		Discovery
year
MASCARA-1 Equuleus 21h10m12.4s +10° 44′ 20″ 8.3 188.7 A8 b 3.7 1.5 2.14878 0.043 0 87 2017
MASCARA-2 Cygnus 19h38m38.7s +31° 13′ 09″ 7.58 137 A2V b 3.518 1.83 3.4741085 0.0542 0.0 86.2 2017
MASCARA-3 Ursa Major 10h47m38s +71° 39′ 21″ 8.4 96.79 F5 b 5.18 1.272 5.5514926 0.06971 89.16 83.11 2019
MASCARA-4 Carina 09h50m19.2s −66° 06′ 50″ 86.7 171.54 A3V b 3.1 1.53 2.82406 0.047 0 88.81 2019
MASCARA-5 Cepheus 21h04m49s +55° 35′ 17″ 8 149.6 AmC b 3.14 1.508 2.65022 0.047 0.01 80.4 2021

References

[edit]
  1. ^"Multi-site All-Sky CAmeRA – Official Website".Leiden Astronomy MASCARA group.Retrieved26 July2017.
  2. ^"Eyes Wide Open for MASCARA in Chile – Exoplanet hunter sees first light at ESO's La Silla Observatory".European Southern Observatory.Retrieved26 July2017.
  3. ^"Eyes Wide Open for MASCARA in Chile – Exoplanet hunter sees first light at ESO's La Silla Observatory".European Southern Observatory.19 July 2017.Retrieved26 July2017.
  4. ^Talens, G. J. J; et al. (2017). "MASCARA-1 b. A hot Jupiter transiting a bright mV= 8.3 A-star in a misaligned orbit ".Astronomy & Astrophysics.606:A73.arXiv:1707.04262.Bibcode:2017A&A...606A..73T.doi:10.1051/0004-6361/201731282.S2CID119259578.
  5. ^Hooton, M. J.; et al. (2022), "Spi-OPS:Spitzerand CHEOPS confirm the near-polar orbit of MASCARA-1 b and reveal a hint of dayside reflection ",Astronomy & Astrophysics,658:A75,arXiv:2109.05031,Bibcode:2022A&A...658A..75H,doi:10.1051/0004-6361/202141645
  6. ^Casasayas-Barris, N.; et al. (2022), "Transmission spectroscopy of MASCARA-1b with ESPRESSO: Challenges of overlapping orbital and Doppler tracks",Astronomy & Astrophysics,664:A121,arXiv:2206.09443,Bibcode:2022A&A...664A.121C,doi:10.1051/0004-6361/202143016
  7. ^Talens, G. J. J; et al. (2018). "MASCARA-2 b: A hot Jupiter transiting a mV= 7.6 A-star ".Astronomy & Astrophysics.A57:612.arXiv:1707.01500.Bibcode:2018A&A...612A..57T.doi:10.1051/0004-6361/201731512.S2CID119422884.
  8. ^Fu, Guangwei; Sing, David K.; Lothringer, Joshua D.; Deming, Drake; Ih, Jegug; Kempton, Eliza M. -R.; Malik, Matej; Komacek, Thaddeus D.; Mansfield, Megan; Bean, Jacob L. (2022), "Strong H2O and CO Emission Features in the Spectrum of KELT-20b Driven by Stellar UV Irradiation ",The Astrophysical Journal Letters,925(1): L3,arXiv:2201.02261,Bibcode:2022ApJ...925L...3F,doi:10.3847/2041-8213/ac4968
  9. ^Kasper, David; Bean, Jacob L.; Line, Michael R.; Seifahrt, Andreas; Brady, Madison T.; Lothringer, Joshua; Pino, Lorenzo; Fu, Guangwei; Pelletier, Stefan; Stürmer, Julian; Benneke, Björn; Brogi, Matteo; Désert, Jean-Michel (2023), "Unifying High- and Low-resolution Observations to Constrain the Dayside Atmosphere of KELT-20b/MASCARA-2b",The Astronomical Journal,165(1): 7,arXiv:2208.04759,Bibcode:2023AJ....165....7K,doi:10.3847/1538-3881/ac9f40
  10. ^Yan, F.; Reiners, A.; Pallé, E.; Shulyak, D.; Stangret, M.; Molaverdikhani, K.; Nortmann, L.; Mollière, P.; Henning, Th.; Casasayas-Barris, N.; Cont, D.; Chen, G.; Czesla, S.; Sánchez-López, A.; López-Puertas, M.; Ribas, I.; Quirrenbach, A.; Caballero, J. A.; Amado, P. J.; Galadí-Enríquez, D.; Khalafinejad, S.; Lara, L. M.; Montes, D.; Morello, G.; Nagel, E.; Sedaghati, E.; Zapatero Osorio, M. R.; Zechmeister, M. (2022), "Detection of iron emission lines and a temperature inversion on the dayside of the ultra-hot Jupiter KELT-20b",Astronomy & Astrophysics,659:A7,arXiv:2201.08759,Bibcode:2022A&A...659A...7Y,doi:10.1051/0004-6361/202142395
  11. ^Dorval, P.; Talens, G. J. J.; Otten, G. P. P. L.; Brahm, R.; Jordán, A.; Torres, P.; Vanzi, L.; Zapata, A.; Henry, T.; Paredes, L.; Jao, W. C.; James, H.; Hinojosa, R.; Bakos, G. A.; Csubry, Z.; Bhatti, W.; Suc, V.; Osip, D.; Mamajek, E. E.; Mellon, S. N.; Wyttenbach, A.; Stuik, R.; Kenworthy, M.; Bailey, J.; Ireland, M.; Crawford, S.; Lomberg, B.; Kuhn, R.; Snellen, I. (2019), "MASCARA-4 b/BRing-1 b: A retrograde hot Jupiter around a bright A-type star",Astronomy & Astrophysics,635:A60,arXiv:1904.02733,doi:10.1051/0004-6361/201935611
  12. ^Ahlers, John P.; Kruse, Ethan; Colón, Knicole D.; Dorval, Patrick; Talens, Geert Jan; Snellen, Ignas; Albrecht, Simon; Otten, Gilles; Ricker, George; Vanderspek, Roland; Latham, David; Seager, Sara; Winn, Joshua; Jenkins, Jon M.; Haworth, Kari; Cartwright, Scott; Morris, Robert; Rowden, Pam; Tenenbaum, Peter; Ting, Eric B. (2019), "Gravity-darkening Analysis of the Misaligned Hot Jupiter MASCARA-4 B",The Astrophysical Journal,888(2): 63,arXiv:1911.05025,doi:10.3847/1538-4357/ab59d0
  13. ^Zhang, Yapeng; Snellen, Ignas A. G.; Wyttenbach, Aurèlien; Nielsen, Louise D.; Lendl, Monika; Casasayas-Barris, Núria; Chaverot, Guillaume; Kesseli, Aurora Y.; Lovis, Christophe; Pepe, Francesco A.; Psaridi, Angelica; Seidel, Julia V.; Udry, Stéphane; Ulmer-Moll, Solène (2022), "Transmission spectroscopy of the ultra-hot Jupiter MASCARA-4 B",Astronomy & Astrophysics,666:A47,arXiv:2208.11427,doi:10.1051/0004-6361/202244203
  14. ^"Scientists uncover a 'hellish' planet so hot it could vaporize most metals".CNET.April 27, 2021.RetrievedApril 27,2021.
  15. ^"'Hellish' new planet discovered ".University of Southern Queensland.April 27, 2021.RetrievedApril 27,2021.

Papers

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  • G.J.J. Talens et al., The Multi-site All-Sky CAmeRA: Finding transiting exoplanets around bright (mV< 8) stars, accepted for publication in A&AarXiv:1702.03931
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