Zobrazeno 1 - 10
of 382
pro vyhledávání: '"Offner, Stella"'
Autor:
Pineda, Jaime E., Soler, Juan D., Offner, Stella, Koch, Eric W., Segura-Cox, Dominique M., Neri, Roberto, Kuffmeier, Michael, Ivlev, Alexei V., Valdivia-Mena, Maria Teresa, Sipilä, Olli, Maureira, Maria Jose, Caselli, Paola, Cunningham, Nichol, Schmiedeke, Anika, Gieser, Caroline, Chen, Michael, Spezzano, Silvia
Publikováno v:
A&A 690, L5 (2024)
Context. Turbulence is a key component of molecular cloud structure. It is usually described by a cascade of energy down to the dissipation scale. The power spectrum for subsonic incompressible turbulence is $k^{-5/3}$, while for supersonic turbulenc
Externí odkaz:
http://arxiv.org/abs/2409.00392
Autor:
Axen, Margot Fitz, Offner, Stella, Hopkins, Phillip F., Krumholz, Mark R., Grudic, Michael Y.
Cosmic rays (CRs) are the primary driver of ionization in star forming molecular clouds (MCs). Despite their potential impacts on gas dynamics and chemistry, no simulations of star cluster formation following the creation of individual stars have inc
Externí odkaz:
http://arxiv.org/abs/2407.17597
We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 3 observations of 73 starless and protostellar cores in the Orion B North molecular cloud. We detect a total of 34 continuum sources at 106 GHz, and after comparisons with other dat
Externí odkaz:
http://arxiv.org/abs/2404.13520
Autor:
Hopkins, Philip F., Grudic, Michael Y., Kremer, Kyle, Offner, Stella S. R., Guszejnov, David, Rosen, Anna L.
Recently, we demonstrated self-consistent formation of strongly-magnetized quasar accretion disks (QADs) from cosmological radiation-magnetohydrodynamic-thermochemical galaxy-star formation simulations, including the full STARFORGE physics shown prev
Externí odkaz:
http://arxiv.org/abs/2404.08046
Autor:
Valdivia-Mena, María Teresa, Pineda, Jaime E., Caselli, Paola, Segura-Cox, Dominique M., Schmiedeke, Anika, Spezzano, Silvia, Offner, Stella, Ivlev, Alexei V., Küffmeier, Michael, Cunningham, Nichol, Neri, Roberto, Maureira, María José
Publikováno v:
A&A 687, A71 (2024)
The detection of narrow channels of accretion toward protostellar disks, known as streamers, have increased in number in the last few years. However, it is unclear if streamers are a common feature around protostars that were previously missed, or if
Externí odkaz:
http://arxiv.org/abs/2404.02144
Autor:
Pineda, Jaime E., Sipilä, Olli, Segura-Cox, Dominique M., Valdivia-Mena, Maria Teresa, Neri, Roberto, Kuffmeier, Michael, Ivlev, Alexei V., Offner, Stella S. R., Maureira, Maria Jose, Caselli, Paola, Spezzano, Silvia, Cunningham, Nichol, Schmiedeke, Anika, Chen, Mike
Publikováno v:
A&A 686, A162 (2024)
Electron fraction and cosmic-ray ionization rates (CRIR) in star-forming regions are important quantities in astrochemical modeling and are critical to the degree of coupling between neutrals, ions, and electrons, which regulates the dynamics of the
Externí odkaz:
http://arxiv.org/abs/2402.16202
Autor:
Choudhury, Spandan, Pineda, Jaime E., Caselli, Paola, Chen, Michael Chun-Yuan, Offner, Stella S. R., Valdivia-Mena, Maria Teresa
Aims. We aim to study the structure and kinematics of the two filaments inside the subsonic core Barnard 5 in Perseus using high-resolution ($\approx$ 2400 au) NH3 data and a multi-component fit analysis. Methods. We used observations of NH3 (1,1) an
Externí odkaz:
http://arxiv.org/abs/2312.17398
Autor:
Chen, Che-Yu, Friesen, Rachel, Li, Jialu, Schmiedeke, Anika, Frayer, David, Li, Zhi-Yun, Tobin, John, Looney, Leslie W., Offner, Stella, Mundy, Lee G., Harris, Andrew I., Church, Sarah, Ostriker, Eve C., Pineda, Jaime E., Hsieh, Tien-Hao, Lam, Ka Ho
The internal velocity structure within dense gaseous cores plays a crucial role in providing the initial conditions for star formation in molecular clouds. However, the kinematic properties of dense gas at core scales (~0.01 - 0.1 pc) has not been ex
Externí odkaz:
http://arxiv.org/abs/2312.12504
Autor:
Millstone, Samuel, Gutermuth, Robert, Offner, Stella S. R., Pokhrel, Riwaj, Grudić, Michael Y.
We explore the relationship between stellar surface density and gas surface density (the star-gas or S-G correlation) in a 20,000 M$_{\odot}$ simulation from the STAR FORmation in Gaseous Environments (STARFORGE) Project. We create synthetic observat
Externí odkaz:
http://arxiv.org/abs/2310.11544
Most stars form in highly clustered environments within molecular clouds, but eventually disperse into the distributed stellar field population. Exactly how the stellar distribution evolves from the embedded stage into gas-free associations and (boun
Externí odkaz:
http://arxiv.org/abs/2309.11415