Explanipedia

Ice crystal complexity leads to weaker ice cloud radiative heating in idealized single-column simulations Open

E. D. Araya, Sylvia Sullivan, Aiko Voigt · 2025

Ice clouds play an important role in the atmospheric radiation budget, both by reflecting shortwave radiation and by absorbing or emitting longwave radiation. These effects can modulate the cloud radiative heating (CRH) rate, which in turn…

Sensitivity of ice cloud radiative heating to optical, macro- and microphysical properties Open

E. D. Araya, Sylvia Sullivan, Aiko Voigt · 2024

Ice clouds play an important role in the atmospheric radiation budget, both by reflecting shortwave radiation and absorbing or emitting longwave radiation. These effects can modulate the cloud radiative heating (CRH) rate, which in turn in…

Radio Continuum and Water Maser Observations of the High-mass Protostar IRAS 19035+0641 A Open

Tatiana M. Rodríguez, Emmanuel Momjian, P. Höfner, A. P. Sarma, E. D. Araya · 2024

We present Very Large Array 1.3 cm continuum and 22.2 GHz H 2 O maser observations of the high-mass protostellar object IRAS 19035+0641 A. Our observations unveil an elongated bipolar 1.3 cm continuum structure at scales ≲500 au, which, to…

Radio Continuum and Water Maser Observations of the High-Mass Protostar IRAS 19035+0641 A Open

Tatiana M. Rodriguez, Emmanuel Momjian, P. Höfner, A. P. Sarma, E. D. Araya · 2024

We present Very Large Array (VLA) 1.3 cm continuum and 22.2 GHz H$_2$O maser observations of the high-mass protostellar object IRAS 19035+0641 A. Our observations unveil an elongated bipolar 1.3 cm continuum structure at scales $\lesssim50…

Broadband VLA Spectral-line Survey of a Sample of Ionized Jet Candidates Open

E. Sanchez-Tovar, E. D. Araya, Viviana Rosero, P. Höfner, S. Kurtz · 2023

The study of the interaction between ionized jets, molecular outflows, and their environments is critical to understanding high-mass star formation, especially because jets and outflows are thought to be key in the transfer of angular mome…

Excited Hydroxyl Outflow in the High-mass Star-forming Region G34.26 + 0.15 Open

Wei Siang Tan, E. D. Araya, Cade Rigg, P. Höfner, S. Kurtz , et al. · 2023

G34.26 + 0.15 is a region of high-mass star formation that contains a broad range of young stellar objects in different stages of evolution, including a hot molecular core, hypercompact H ii regions, and a prototypical cometary ultracompac…

The Next Generation Arecibo Telescope (NGAT) Open

D. Anish Roshi, Nestor Apnote, E. D. Araya, Héctor G. Arce, Lisa‐Jane Baker , et al. · 2023

Whitepaper #344 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional topics: other basic research; ground-based missions/projects; …

Excited Hydroxyl Outflow in the High-Mass Star-Forming Region G34.26+0.15 Open

W. S. Tan, E. D. Araya, Cade Rigg, P. Höfner, S. Kurtz , et al. · 2023

G34.26+0.15 is a region of high-mass star formation that contains a broad range of young stellar objects in different stages of evolution, including a hot molecular core, hyper-compact HII regions and a prototypical cometary ultra-compact …

Broadband VLA Spectral Line Survey of a Sample of Ionized Jet Candidates Open

E. Sanchez-Tovar, E. D. Araya, Viviana Rosero, P. Höfner, S. Kurtz · 2023

The study of the interaction between ionized jets, molecular outflows and their environments is critical to understanding high-mass star formation, especially because jets and outflows are thought to be key in the transfer of angular momen…

Searching for Molecular Jets from High-mass Protostars Open

Tatiana M. Rodríguez, P. Höfner, Isaac Edelman, E. D. Araya, Viviana Rosero · 2023

We report Very Large Array observations in the Q band toward 10 ionized jet candidates to search for SiO emission, a well-known shocked gas tracer. We detected 7 mm continuum counterparts toward 90% of the jet candidates. In most cases, th…

Searching for Molecular Jets from High-Mass Protostars Open

Tatiana M. Rodriguez, P. Höfner, Isaac Edelman, E. D. Araya, Viviana Rosero · 2023

We report Very Large Array (VLA) observations in the Q-band toward 10 ionized jet candidates to search for SiO emission, a well-known shocked gas tracer. We detected 7 mm continuum counterparts toward 90% of the jet candidates. In most cas…

Discovery of a Highly Collimated Flow from the High-mass Protostar ISOSS J23053+5953 SMM2 Open

Tatiana M. Rodríguez, P. Höfner, E. D. Araya, Qizhou Zhang, H. Linz , et al. · 2021

We present Very Large Array C- , X- , and Q -band continuum observations, as well as 1.3 mm continuum and CO(2-1) observations with the Submillimeter Array toward the high-mass protostellar candidate ISOSS J23053+5953 SMM2. Compact centime…

Discovery of a Highly Collimated Flow from the High-Mass Protostar ISOSS J23053+5953 SMM2 Open

T. M., Rodríguez, P. Höfner, E. D. Araya, Q. Zhang , et al. · 2021

We present Very Large Array C, X, and Q-band continuum observations, as well as 1.3 mm continuum and CO(2-1) observations with the Submillimeter Array toward the high-mass protostellar candidate ISOSS J23053+5953 SMM2. Compact cm continuum…

Thermal formaldehyde emission in NGC 7538 IRS 1 Open

Onic I. Shuvo, E. D. Araya, W. S. Tan, P. Höfner, S. Kurtz , et al. · 2021

Spectral lines from formaldehyde (H2CO) molecules at cm wavelengths are typically detected in absorption and trace a broad range of environments, from diffuse gas to giant molecular clouds. In contrast, thermal emission of formaldehyde lin…

A Highly Collimated Flow from the High-mass Protostar ISOSS J23053+5953 SMM2 Open

Tatiana M. Rodríguez, P. Höfner, E. D. Araya, Qizhou Zhang, H. Linz , et al. · 2021

We present Very Large Array cm continuum observations, as well as 1.3 mm continuum and CO(2–1) observations taken with the Submillimeter Array toward the high-mass protostellar candidate ISOSS J23053+5953 SMM2. Compact cm continuum emissio…

High-sensitivity observations of molecular lines with the Arecibo Telescope Open

W. S. Tan, E. D. Araya, L E Lee, P. Höfner, S. Kurtz , et al. · 2020

We report on one of the highest sensitivity surveys for molecular lines in the frequency range 6.0–7.4 GHz conducted to date. The observations were done with the 305- m Arecibo Telescope toward a sample of 12 intermediate-/high-mass star-f…

Radio Recombination Line Observations Toward the Massive Star Forming Region W51 IRS1 Open

Mishaal. I. Jan, D. Anish Roshi, M. Lebrón, E. Janot-Pacheco, T. Ghosh , et al. · 2019

We observed radio recombination lines (RRLs) toward the W51 molecular cloud complex, one of the most active star forming regions in our Galaxy. The UV radiation from young massive stars ionizes gas surrounding them to produce HII regions. …

Weak and Compact Radio Emission in Early High-mass Star-forming Regions. II. The Nature of the Radio Sources Open

Viviana Rosero, P. Höfner, S. Kurtz, R. Cesaroni, Carlos Carrasco‐González , et al. · 2019

In this study we analyze 70 radio continuum sources that are associated with dust clumps and which are considered to be candidates for the earliest stages of high-mass star formation. The detection of these sources was reported by Rosero e…

Astro2020 Activities and Projects White Paper: Arecibo Observatory in the Next Decade Open

D. Anish Roshi, L. D. Anderson, E. D. Araya, Dana S. Balser, W. Brisken , et al. · 2019

The white paper discusses Arecibo Observatory's plan for facility improvements and activities over the next decade. The facility improvements include: (a) improving the telescope surface, pointing and focusing to achieve superb performance…

Unveiling the Hot Molecular Core in the Ultracompact \hii Region with Extended Emission G12.21--0.10 Open

E. De la Fuente, M. A. Trinidad, Alicia Porras, C. A. Rodriguez‐Rico, E. D. Araya , et al. · 2017

We present a multiwavelength study of the cometary \hii region G12.21--0.10 using the VLA and OVRO. Both radio continuum (0.3, 0.7, 2 and 3.6~cm) and spectral lines of H41$α$, $^{13}$CS(2$-$1) \& (1$-$0), and NH$_{\rm 3}$(2,2) \& (4,4) obs…

Unveiling the Hot Molecular Core in the Ultracompact \\hii Region with\n Extended Emission G12.21--0.10 Open

E. De la Fuente, M. A. Trinidad, A. Porras, C. A. Rodriguez‐Rico, E. D. Araya , et al. · 2017

We present a multiwavelength study of the cometary \\hii region G12.21--0.10\nusing the VLA and OVRO. Both radio continuum (0.3, 0.7, 2 and 3.6~cm) and\nspectral lines of H41$\\alpha$, $^{13}$CS(2$-$1) \\& (1$-$0), and NH$_{\\rm\n3}$(2,2) …

A Catalog of 44 GHz Methanol Masers in Massive Star-forming Regions. IV. The High-mass Protostellar Object Sample Open

Carolina B. Rodríguez-Garza, S. Kurtz, Arturo I. Gómez-Ruiz, P. Höfner, E. D. Araya , et al. · 2017

We present a survey of 56 massive star-forming regions in the 44 GHz methanol\nmaser transition made with the Karl G. Jansky Very Large Array (VLA); 24 of the\n56 fields showed maser emission. The data allow us to demonstrate associations,…

Interferometric and single-dish observations of 44, 84 and 95 GHz Class I methanol masers Open

Carolina B. Rodríguez-Garza, S. Kurtz, Arturo I. Gómez-Ruiz, P. Höfner, E. D. Araya , et al. · 2017

We present observations of massive star-forming regions selected from the IRAS Point Source Catalog. The observations were made with the Very Large Array and the Large Millimeter Telescope to search for Class I methanol masers. We made int…

WEAK AND COMPACT RADIO EMISSION IN EARLY HIGH-MASS STAR-FORMING REGIONS. I. VLA OBSERVATIONS Open

Viviana Rosero, P. Höfner, M. J. Claussen, S. Kurtz, R. Cesaroni , et al. · 2016

We present a high-sensitivity radio continuum survey at 6 and 1.3 cm using the Karl G. Jansky Very Large Array toward a sample of 58 high-mass star-forming regions. Our sample was chosen from dust clumps within infrared dark clouds with an…

A CATALOG OF METHANOL MASERS IN MASSIVE STAR-FORMING REGIONS. III. THE MOLECULAR OUTFLOW SAMPLE Open

Arturo I. Gómez-Ruiz, S. Kurtz, E. D. Araya, P. Höfner, Laurent Loinard · 2016

We present an interferometric survey of the 44 GHz class I methanol maser\ntransition toward a sample of 69 sources consisting of High Mass Protostellar\nObject candidates and Ultracompact (UC) H II regions. We found a 38% detection\nrate …

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