Zobrazeno 1 - 10
of 592
pro vyhledávání: '"A. Scibelli"'
Binaries are known to play a key role in the mass loss and dynamical environments of evolved stars. Stellar and sub-stellar companion interactions produce complex wind morphologies including rotating/expanding disks, bipolar outflows, and spiral wind
Externí odkaz:
http://arxiv.org/abs/2411.08120
Cold ($\sim$10 K) and dense ($\sim$10$^{5}$ cm$^{-3}$) cores of gas and dust within molecular clouds, known as starless and dynamically evolved prestellar cores, are the birthplaces of low-mass ($M$ $\leq$ few M$_\odot$) stars. As detections of inter
Externí odkaz:
http://arxiv.org/abs/2408.11613
Autor:
Pandhi, A., Friesen, R. K., Fissel, L., Pineda, J. E., Caselli, P., Chen, M. C-Y., Di Francesco, J., Ginsburg, A., Kirk, H., Myers, P. C., Offner, S. S. R., Punanova, A., Quan, F., Redaelli, E., Rosolowsky, E., Scibelli, S., Seo, Y. M., Shirley, Y.
Studies of dense core morphologies and their orientations with respect to gas flows and the local magnetic field have been limited to only a small sample of cores with spectroscopic data. Leveraging the Green Bank Ammonia Survey alongside existing su
Externí odkaz:
http://arxiv.org/abs/2307.13022
Autor:
Scibelli, Samantha, Shirley, Yancy, Schmiedeke, Anika, Svoboda, Brian, Singh, Ayushi, Lilly, James, Caselli, Paola
Low-mass stars like our Sun begin their evolution within cold (10 K) and dense ($\sim 10^5$ cm$^{-3}$) cores of gas and dust. The physical structure of starless cores is best probed by thermal emission of dust grains. We present a high resolution dus
Externí odkaz:
http://arxiv.org/abs/2303.09574
Autor:
Smith, Simon E. T., Friesen, Rachel, Marchal, Antoine, Pineda, Jaime E., Caselli, Paola, Chen, Michael Chun-Yuan, Choudhury, Spandan, Di Francesco, James, Ginsburg, Adam, Kirk, Helen, Matzner, Chris, Punanova, Anna, Scibelli, Samantha, Shirley, Yancy
Filamentary structures have been found nearly ubiquitously in molecular clouds and yet their formation and evolution is still poorly understood. We examine a segment of Taurus Molecular Cloud 1 (TMC-1) that appears as a single, narrow filament in con
Externí odkaz:
http://arxiv.org/abs/2211.10535
Autor:
Galloway-Sprietsma, Maria, Shirley, Yancy L., Di Francesco, James, Keown, Jared, Scibelli, Samantha, Sipilä, Olli, Smullen, Rachel
Understanding the chemical processes during starless core and prestellar core evolution is an important step in understanding the initial stages of star and disk formation. This project is a study of deuterated ammonia, o-NH$_2$D, in the L1251 star-f
Externí odkaz:
http://arxiv.org/abs/2207.10718
Autor:
Alfieri, Paolo, Scibelli, Francesco, Sannino, Patrizia, Napoli, Eleonora, Menghini, Deny, Stellino, Stefania, Valeri, Giovanni, Vicari, Stefano
Publikováno v:
In Research in Developmental Disabilities December 2024 155
We have observed the mass-losing carbon star V Hya that is apparently transitioning from an AGB star to a bipolar planetary nebula, at an unprecedented angular resolution of ~0".4-0".6 with the Atacama Large Millimeter/submillimeter Wave Array (ALMA)
Externí odkaz:
http://arxiv.org/abs/2202.09335
Autor:
Punanova, Anna, Vasyunin, Anton, Caselli, Paola, Howard, Alexander, Spezzano, Silvia, Shirley, Yancy, Scibelli, Samantha, Harju, Jorma
Chemical models predict that in cold cores gas-phase methanol is expected to be abundant at the outer edge of the CO depletion zone, where CO is actively adsorbed. CO adsorption correlates with volume density in cold cores, and, in nearby molecular c
Externí odkaz:
http://arxiv.org/abs/2112.04538
Determining the level of chemical complexity within dense starless and gravitationally bound prestellar cores is crucial for constructing chemical models, which subsequently constrain the initial chemical conditions of star formation. We have searche
Externí odkaz:
http://arxiv.org/abs/2104.07683