Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title> <jats:p>The Comet Interceptor Mission (ESA/JAXA) aims to visit a long-period comet or interstellar object. Its primary science goals are to characterize the object's shape, structure, and the composition of its surface and gas coma. The mission consists of three spacecraft, the primary and two accompanying ones. The focus of this paper is the unique synergetic activities between two mass spectrometers to investigate the chemical composition of the coma, one on the primary spacecraft and another on an accompanying spacecraft. Both can be operated in a complementary fashion, at different locations and at the same time, to sort out spatial from temporal effects. Relevant investigations of the coma composition and chemistry within the technical specifications of the instruments could address several unsolved questions. The Comet Interceptor Mission is posed to be an important mission for advancing our knowledge of comets, especially clues for understanding coma chemistry and composition.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>In the current picture of cosmology and astrophysics, the formation and evolution of galaxies is closely linked to that of their dark matter haloes. The best representation of this galaxy-dark matter halo co-evolution is the <jats:inline-formula> <jats:tex-math> <?CDATA ${M}_{* }\mbox{--}{M}_{\mathrm{halo}}$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>*</mml:mo> </mml:mrow> </mml:msub> <mml:mo>–</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>halo</mml:mi> </mml:mrow> </mml:msub> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="rnaasabf4e5ieqn1.gif" xlink:type="simple" /> </jats:inline-formula> relation. In this study we investigate how the radio-mode feedback from active galactic nuclei (AGN) affects the <jats:inline-formula> <jats:tex-math> <?CDATA ${M}_{* }\mbox{--}{M}_{\mathrm{halo}}$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>*</mml:mo> </mml:mrow> </mml:msub> <mml:mo>–</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>halo</mml:mi> </mml:mrow> </mml:msub> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="rnaasabf4e5ieqn2.gif" xlink:type="simple" /> </jats:inline-formula> relation at redshifts 0.08 &lt; <jats:italic>z</jats:italic> &lt; 1.53. We use a set of 111 radio-selected AGN at 3 GHz VLA-COSMOS within the X-ray galaxy groups in the COSMOS field. We compare these results to those for 171 star-forming galaxies (SFGs), using the theoretical relation of Moster et al. We find that AGN agree within 1% with the Moster et al. relation, SFGs show an offset of 37%, suggesting that the radio-mode feedback from AGN at a median redshift of ∼0.5 still plays a significant role in the <jats:inline-formula> <jats:tex-math> <?CDATA ${M}_{* }\mbox{--}{M}_{\mathrm{halo}}$?> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>*</mml:mo> </mml:mrow> </mml:msub> <mml:mo>–</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>halo</mml:mi> </mml:mrow> </mml:msub> </mml:math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="rnaasabf4e5ieqn3.gif" xlink:type="simple" /> </jats:inline-formula> relation.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>We present 46 HW Virginis Post-Common Envelope Binary Systems identified by the Zwicky Transient Facility, 26 of which appear to be new discoveries. Through the application of the Box Least-Squares Algorithm to ZTF data, we searched a data set of 17,473 systems for periodicity and phase-folded all of the ZTF lightcurves of the objects at their best period. Through visual analysis of these phase-folded lightcurves, we identified the 46 HW Vir Systems.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>In the last decade, exoplanets space missions started to collect a huge amount of photometric observations, with over ∼1,000,000 new light curves generated every month from the Transiting Exoplanet Survey Satellite (TESS) full-frame images alone. In order to analyze such an unprecedented volume of data, automated planet-candidate detection has become an appreciable replacement to human vetting. In this work, we present a Machine Learning approach, based on Deep Neural Networks, to perform a binary classification of TESS light curves in terms of planet candidate and not-planet. Since few TESS labeled data exist to date, we pre-train the network with Kepler DR24 data set, including ≳15,000 labeled light curves. Our pre-trained model is then tested on ExoFOP data, showing an appreciable gain in terms of reliability with respect to a randomly initialized model.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>In this research note, we present <jats:monospace>linemake</jats:monospace>, an open-source atomic and molecular line list generator. Rather than a replacement for a number of well-established atomic and molecular spectral databases, <jats:monospace>linemake</jats:monospace> aims to be a lightweight, easy-to-use tool to generate formatted and curated lists suitable for spectral synthesis work. We encourage users of <jats:monospace>linemake</jats:monospace> to understand the sources of their transition data and cite them as appropriate in published work. We provide the code, line database, and an extensive list of literature references in a <jats:monospace>GitHub</jats:monospace> repository (<jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="https://github.com/vmplacco/linemake" xlink:type="simple">https://github.com/vmplacco/linemake</jats:ext-link>), which will be updated regularly as new data become available.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>The Sun, Moon, planets, and stars have accompanied sky watchers over millennia. The Pleiades star cluster, observable from every continent except Antarctica, is tied to Indigenous worldviews, astronomy, calendaring, traditional weaving, weather prediction, and agriculture. The heliacal rising of the cluster—its first visible sighting in the morning twilight before sunrise, is particularly significant. For the original peoples of Polynesia, Mesoamerica, and the Andes, the Pleiades continue to be a source of knowledge, both culturally and scientifically. Due to the loss of Indigenous languages and the pressures of globalization, the knowledge is eroding at a fast pace. We describe a Fulbright U.S. Global Scholar project and emerging results from collaborative research conducted in ancestral lands with Indigenous elders, young adults, and academics, as well as with other knowledge holders in Aotearoa/New Zealand, Guatemala, and Peru. Results are being shared locally for the benefit of the host communities and future generations.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>For many generations, the Maya people of the highlands of Guatemala have been engaged in continual knowledge creation emerging from a deep and sustained relationship with the Earth and the sky. Maya elders and youth who are Calendar Keepers, or Ajq’ijab’ in the K’iche’ Mayan language, curate calendars with roots in pre-colonial times. The pressures of colonial invasion, civil war, and globalization have eroded the oral tradition and ancestral memory in the community, causing the loss of invaluable cultural information. Today, certain sectors of Maya youth are engaged in cultural revitalization and the recovery of ancestral astronomical knowledge. Our elders are extremely important for strengthening the oral tradition and the historical, scientific, and cultural understandings of the night sky. I describe a project of recovery of the Maya constellations, ancestral observation sites, and measurement techniques in the Guatemala highlands.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>Galaxy mergers are a mechanism for rapid quenching of star formation. We are studying E+A galaxies (a type of post-starburst galaxy) and how they are impacted by merging. Examining E+A galaxies with companions offers insight into the evolution of E+As and the quenching process. The Y/Dim Collaboration collected a sample of E+A candidate galaxies from the SDSS DR16. Among the E+A candidates that were visually identified as interacting, 14 were spectroscopically confirmed to have companions. Our sample contained 11 pairs of galaxies and two groups of three galaxies. In one of these groups of three, there are two E+A candidates. Nine of these E+A candidates are involved in minor interactions with their companions.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>We report the preliminary near- and mid-infrared 3D radiative transfer simulations of the carbon-rich AGB star RU Vir using the 3D radiative transfer code RADMC-3D. We found that the inclusion of molecular and dust species reproduces the extended atmosphere of this star well. This study is the beginning of an in-progress effort toward a more systematic 3D radiative transfer modeling of RU Vir’s extended atmosphere, and other AGB stars. These efforts aim at constraining the stars’ stellar parameters, and as preparatory work for the first multi-wavelength imaging of carbon-rich AGB stars with the newest VLTI/MATISSE interferometric instrument.</jats:p>

<jats:title>Abstract</jats:title> <jats:p>We report on the processes and findings related to the iterative design of the San Antonio Teacher Training Astronomy Academy (SATTAA). In particular, we show how the initial iteration in 2018, limited to only future (or preservice) secondary school STEM teachers, broadened to include current (or in-service) secondary school teachers in 2019, and then added primary school pre- and in-service teachers in 2020. The participants of all three years are now part of a community of practice that continues to engage in astronomy education in varied ways.</jats:p>