Search Results - "Offner, Stella S. R."

The Effects of Radiative Transfer on Low-Mass Star Formation by Offner, Stella S. R, Klein, Richard I, McKee, Christopher F, Krumholz, Mark R

“…Forming stars emit a substantial amount of radiation into their natal environment. We use ORION, an adaptive mesh refinement (AMR) three-dimensional…”
Get full text

Formation of Massive Star Systems by Accretion by Krumholz, Mark R, Klein, Richard I, McKee, Christopher F, Offner, Stella S.R, Cunningham, Andrew J

“…Massive stars produce so much light that the radiation pressure they exert on the gas and dust around them is stronger than their gravitational attraction, a…”
Get full text

The formation of a quadruple star system with wide separation by Pineda, Jaime E., Offner, Stella S. R., Parker, Richard J., Arce, Héctor G., Goodman, Alyssa A., Caselli, Paola, Fuller, Gary A., Bourke, Tyler L., Corder, Stuartt A.

“…Observations of a wide-separation quadruple system in the Perseus star-forming region reveal a young protostar and three gravitationally bound dense gas…”
Get full text

Driven and Decaying Turbulence Simulations of Low-Mass Star Formation: From Clumps to Cores to Protostars by Offner, Stella S. R, Klein, Richard I, McKee, Christopher F

“…Molecular clouds are observed to be turbulent, but the origin of this turbulence is not well understood. As a result, there are two different approaches to…”
Get full text

Impact of Protostellar Outflows on Turbulence and Star Formation Efficiency in Magnetized Dense Cores by Offner, Stella S. R., Chaban, Jonah

“…The star-forming efficiency of dense gas is thought to be set within cores by outflow and radiative feedback. We use magnetohydrodynamic simulations to…”
Get full text

STARFORGE: the effects of protostellar outflows on the IMF by Guszejnov, Dávid, Grudić, Michael Y, Hopkins, Philip F, Offner, Stella S R, Faucher-Giguère, Claude-André

“…ABSTRACT The initial mass function (IMF) of stars is a key quantity affecting almost every field of astrophysics, yet it remains unclear what physical…”
Get full text

The Astrochemical Impact of Cosmic Rays in Protoclusters. I. Molecular Cloud Chemistry by Gaches, Brandt A. L., Offner, Stella S. R., Bisbas, Thomas G.

“…We present astrochemical photodissociation region models in which cosmic-ray (CR) attenuation has been fully coupled to the chemical evolution of the gas. We…”
Get full text

The Formation and Evolution of Wide-orbit Stellar Multiples In Magnetized Clouds by Lee, Aaron T., Offner, Stella S. R., Kratter, Kaitlin M., Smullen, Rachel A., Li, Pak Shing

“…Stars rarely form in isolation. Nearly half of the stars in the Milky Way have a companion, and this fraction increases in star-forming regions. However, why…”
Get full text

A Census of Outflow to Magnetic Field Orientations in Nearby Molecular Clouds by Xu, Duo, Offner, Stella S. R., Gutermuth, Robert, Tan, Jonathan C.

“…Abstract We define a sample of 200 protostellar outflows showing blue- and redshifted CO emission in the nearby molecular clouds Ophiuchus, Taurus, Perseus,…”
Get full text

Can magnetized turbulence set the mass scale of stars? by Guszejnov, Dávid, Grudić, Michael Y, Hopkins, Philip F, Offner, Stella S R, Faucher-Giguère, Claude-André

“…ABSTRACT Understanding the evolution of self-gravitating, isothermal, magnetized gas is crucial for star formation, as these physical processes have been…”
Get full text

Evolution of giant molecular clouds across cosmic time by Guszejnov, Dávid, Grudić, Michael Y, Offner, Stella S R, Boylan-Kolchin, Michael, Faucher-Gigère, Claude-André, Wetzel, Andrew, Benincasa, Samantha M, Loebman, Sarah

“…ABSTRACT Giant molecular clouds (GMCs) are well studied in the local Universe, however, exactly how their properties vary during galaxy evolution is poorly…”
Get full text

Impact of Cosmic-Ray Feedback on Accretion and Chemistry in Circumstellar Disks by Offner, Stella S. R., Gaches, Brandt A. L., Holdship, Jonathan R.

“…We use the gas-grain chemistry code uclchem to explore the impact of cosmic-ray feedback on the chemistry of circumstellar disks. We model the attenuation and…”
Get full text

Turbulence, coherence, and collapse: Three phases for core evolution by Offner, Stella S R, Taylor, Josh, Markey, Carleen, Chen, Hope How-Huan, Pineda, Jaime E, Goodman, Alyssa A, Burkert, Andreas, Ginsburg, Adam, Choudhury, Spandan

“…ABSTRACT We study the formation, evolution, and collapse of dense cores by tracking structures in a magnetohydrodynamic simulation of a star-forming cloud. We…”
Get full text

An ALMA Search for Substructure and Fragmentation in Starless Cores in Orion B North by Fielder, Samuel D., Kirk, Helen, Dunham, Michael M., Offner, Stella S. R.

“…Abstract We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 3 observations of 73 starless and protostellar cores in the Orion B North…”
Get full text

The Formation of Low-mass Binary Star Systems Via Turbulent Fragmentation by Offner, Stella S. R, Kratter, Kaitlin M, Matzner, Christopher D, Krumholz, Mark R, Klein, Richard I

“…We characterize the infall rate onto protostellar systems forming in self-gravitating radiation-hydrodynamics simulations. Using two dimensionless parameters…”
Get full text

Aluminum-26 Enrichment in the Surface of Protostellar Disks Due to Protostellar Cosmic Rays by Gaches, Brandt A. L., Walch, Stefanie, Offner, Stella S. R., Münker, Carsten

“…The radioactive decay of aluminum-26 (26Al) is an important heating source in early planet formation. Since its discovery, there have been several mechanisms…”
Get full text

Coevolution of Stars and Gas: Using an Analysis of Synthetic Observations to Investigate the Star–Gas Correlation in STARFORGE by Millstone, Samuel, Gutermuth, Robert, Offner, Stella S. R., Pokhrel, Riwaj, Grudić, Michael Y.

“…Abstract We explore the relation between stellar surface density and gas surface density (the star–gas, or S-G, correlation) in a 20,000 M ⊙ simulation from…”
Get full text

The Green Bank Ammonia Survey: First Results of NH3 Mapping of the Gould Belt by Friesen, Rachel K., Pineda, Jaime E., Rosolowsky, Erik, Alves, Felipe, Chacón-Tanarro, Ana, Chen, Hope How-Huan, Chen, Michael Chun-Yuan, Di Francesco, James, Keown, Jared, Kirk, Helen, Punanova, Anna, Seo, Youngmin, Shirley, Yancy, Ginsburg, Adam, Hall, Christine, Offner, Stella S. R., Singh, Ayushi, Arce, Héctor G., Caselli, Paola, Goodman, Alyssa A., Martin, Peter G., Matzner, Christopher, Myers, Philip C., Redaelli, Elena

“…We present an overview of the first data release (DR1) and first-look science from the Green Bank Ammonia Survey (GAS). GAS is a Large Program at the Green…”
Get full text

Star-Gas Surface Density Correlations in 12 Nearby Molecular Clouds. I. Data Collection and Star-sampled Analysis by Pokhrel, Riwaj, Gutermuth, Robert A., Betti, Sarah K., Offner, Stella S. R., Myers, Philip C., Megeath, S. Thomas, Sokol, Alyssa D., Ali, Babar, Allen, Lori, Allen, Thomas S., Dunham, Michael M., Fischer, William J., Henning, Thomas, Heyer, Mark, Hora, Joseph L., Pipher, Judith L., Tobin, John J., Wolk, Scott J.

“…We explore the relation between the stellar mass surface density and the mass surface density of molecular hydrogen gas in 12 nearby molecular clouds that are…”
Get full text

An Episodic Wide-angle Outflow in HH 46/47 by Zhang, Yichen, Arce, Héctor G., Mardones, Diego, Cabrit, Sylvie, Dunham, Michael M., Garay, Guido, Noriega-Crespo, Alberto, Offner, Stella S. R., Raga, Alejandro C., Corder, Stuartt A.

“…During star formation, the accretion disk drives fast MHD winds, which usually contain two components, a collimated jet and a radially distributed wide-angle…”
Get full text