<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-1101</journal-id>
<journal-title><![CDATA[Revista mexicana de astronomía y astrofísica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. astron. astrofis]]></abbrev-journal-title>
<issn>0185-1101</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Astronomía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-11012022000100099</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2022.58.01.08</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Comprehensive Analysis of the Full Tess Orbital Phase Curve of Wasp-121b]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eftekhar]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Zanjan Faculty of Science Department of Physics]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Iran</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>58</volume>
<numero>1</numero>
<fpage>99</fpage>
<lpage>107</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012022000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012022000100099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012022000100099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT We present the full phase curve analysis of the ultrahot Jupiter WASP-121b using observations from the Transiting Exoplanet Survey Satellite (TESS). Our comprehensive phase curve model includes primary transit, secondary eclipse, thermal emission, reflection, and ellipsoidal tidal distortion. After removing the instrumental systematic noise, we reliably detect the secondary eclipse with a depth of    489  - 10  + 16 parts-per-million (ppm), dominated by thermal emission. Using the TESS bandpass, we measure the dayside    2941  - 150  + 61 K and nightside    2236  - 97  + 38 K temperatures of WASP-121b. We find that a hotspot is well aligned with the substellar point, leading to the conclusion that there is an inefficient heat distribution from the dayside to the nightside. Our estimated geometric albedo,    A  g =   0.069  - 0.02  + 0.06, suggest that WASP-121b has a low geometric albedo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Presentamos el análisis de la curva de fase completa del &#8220;Júpiter&#8221; ultracaliente WASP-121b, utilizando observaciones del satélite TESS. Nuestro modelo de la curva de fase completa incluye el tránsito primario, el eclipse secundario, emisión térmica, reflexión y distorsión elipsoidal por mareas. Después de eliminar el ruido instrumental sistemático, detectamos claramente el eclipse secundario, con una profundidad de    489  - 10  + 16 partes por millón, mismo que está dominado por emisión térmica. En la banda del TESS determinamos valores de la temperatura diurna y nocturna de WASP-121 de    2941  - 150  + 61 K y    2236  - 97  + 38 K, respectivamente. Encontramos que hay una mancha caliente alineada con el punto subestelar, lo que nos lleva a concluir que la distribución de calor entre la cara diurna y la nocturna es ineficiente. Nuestra estimación para el albedo geométrico,    A  g =   0.069  - 0.02  + 0.06, sugiere un valor bajo para WASP-121b.]]></p></abstract>
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