82 citations · 464 across the 25 of their papers we have counts for
23 papers · 1 filter
Sulphur-bearing molecule survey towards prestellar and starless cores in the Perseus molecular cloud
J. Ferrer Asensio, S. Scibelli, A. Pokorny-Yadav +7
Sulphur is drastically depleted from the gas phase in dense starless and prestellar cores, creating the long-standing "missing sulphur problem". Observations of sulphur-bearing mol…
Chemical complexity in feedback from supernova remnants: first detection of PO+ in IC443 and W44
G. Cosentino, F. Priestley, S. Scibelli +1
Supernova remnant (SNR) may shape the physical and chemical properties of star formation. By releasing refractory elements into the gas phase, they inject material of pre-biotic re…
Deuteration of Organic Molecules as a Probe of Starless Core and Filament Evolution in Barnard 10
Hanga Andras-Letanovszky, Yancy L. Shirley, Lucille J. Steffes +4
The deuterium fractionation of molecules in starless cores is sensitive to their dynamical histories, which recent magnetohydrodynamical simulations have shown to be extremely vari…
Inventories of Rich Carbon-Chain Chemistry in Prestellar and Starless Cores in the Perseus Molecular Cloud
Anissa Pokorny-Yadav, Samantha Scibelli, Judit Ferrer Asensio +3
Carbon-chain molecules serve as an important reservoir of reactive organic matter that will eventually be incorporated into protoplanetary disks, planets, and cometary material. Pr…
c-C3H2 deuteration towards prestellar and starless cores in the Perseus Molecular Cloud
J. Ferrer Asensio, S. Scibelli, L. Steffes +6
Deuterium fractionation becomes highly efficient in cold, dense cores where CO is frozen out. Cyclopropenylidene (c-C3H2), an early-formed carbon ring, and its deuterated isotopolo…
The Green Bank Ammonia Survey: Data Release 2
Jaime E. Pineda, Rachel K. Friesen, Erik Rosolowsky +22
We present an overview of the final data release (DR2) from the Green Bank Ammonia Survey (GAS). GAS is a Large Program at the Green Bank Telescope to map all Gould Belt star-formi…
Nascent chemical complexity in prestellar core IRAS 16293E: complex organics and deuterated methanol
Samantha Scibelli, Maria N. Drozdovskaya, Paola Caselli +5
Prestellar cores represent early sites of low-mass ( few M) star and planet formation and provide insight into initial chemical conditions of complex organic mole…
First Detections of PN, PO, and PO+ toward a Shocked Low-mass Starless Core
Samantha Scibelli, Andrés Megías, Izaskun Jiménez-Serra +6
Phosphorus is a key element that plays an essential role in biological processes important for living organisms on Earth. The origin and connection of phosphorus-bearing molecules…
NEATH IV: an early onset of complex organic chemistry in molecular clouds
F. D. Priestley, P. C. Clark, S. E. Ragan +6
Complex organic molecules (COMs) are widely detected in protostellar and protoplanetary systems, where they are thought to have been inherited in large part from earlier evolutiona…
Survey of Complex Organic Molecules in Starless and Prestellar Cores in the Perseus Molecular Cloud
Samantha Scibelli, Yancy Shirley, Andrés Megías +1
Cold (10 K) and dense (10 cm) cores of gas and dust within molecular clouds, known as starless and dynamically evolved prestellar cores, are the birthplace…
Alignment of dense molecular core morphology and velocity gradients with ambient magnetic fields
A. Pandhi, R. K. Friesen, L. Fissel +15
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 spectroscopi…
3D Radiative Transfer Modelling and Virial Analysis of Starless Cores in the B10 Region of the Taurus Molecular Cloud
Samantha Scibelli, Yancy Shirley, Anika Schmiedeke +4
Low-mass stars like our Sun begin their evolution within cold (10 K) and dense ( cm) cores of gas and dust. The physical structure of starless cores is best probe…
Velocity-Coherent Substructure in TMC-1: Inflow and Fragmentation
Simon E. T. Smith, Rachel Friesen, Antoine Marchal +11
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 Mole…
Methanol Mapping in Cold Cores: Testing Model Predictions
Anna Punanova, Anton Vasyunin, Paola Caselli +5
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 co…
Detection of Complex Organic Molecules in Young Starless Core L1521E
Samantha Scibelli, Yancy Shirley, Anton Vasyunin +1
Determining the level of chemical complexity within dense starless and gravitationally bound prestellar cores is crucial for constructing chemical models, which subsequently constr…
A Survey of CH2DOH Towards Starless and Prestellar Cores in the Taurus Molecular Cloud
Hannah E. Ambrose, Yancy L. Shirley, Samantha Scibelli
Recent observations indicate that organic molecules are prevalent towards starless and prestellar cores. Deuteration of these molecules has not been well-studied during the starles…
Relative Alignment between Dense Molecular Cores and Ambient Magnetic Field: The Synergy of Numerical Models and Observations
Che-Yu Chen, Erica A. Behrens, Jasmin E. Washington +26
The role played by magnetic field during star formation is an important topic in astrophysics. We investigate the correlation between the orientation of star-forming cores (as defi…
Velocity-coherent Filaments in NGC 1333: Evidence for Accretion Flow?
Michael Chun-Yuan Chen, James Di Francesco, Erik Rosolowsky +11
Recent observations of global velocity gradients across and along molecular filaments have been interpreted as signs of gas accreting onto and along these filaments, potentially fe…
Prevalence of Complex Organic Molecules in Starless and Prestellar Cores within the Taurus Molecular Cloud
Samantha Scibelli, Yancy Shirley
The detection of complex organic molecules (COMs) toward dense, collapsing prestellar cores has sparked interest in the fields of astrochemistry and astrobiology, yet the mechanism…
Droplets II: Internal Velocity Structures and Potential Rotational Motions in Pressure-dominated Coherent Structures
Hope How-Huan Chen, Jaime E. Pineda, Stella S. R. Offner +6
We present an analysis of the internal velocity structures of the newly identified sub-0.1 pc coherent structures, droplets, in L1688 and B18. By fitting 2D linear velocity fields…
Biases in inferring dark matter profiles from dynamical and lensing measurements
Samantha Scibelli, Rosalba Perna, Charles Keeton
The degeneracy between disc and halo contributions in spiral galaxy rotation curves makes it difficult to obtain a full understanding of the distribution of baryons and dark matter…
Droplets I: Pressure-Dominated Sub-0.1 pc Coherent Structures in L1688 and B18
Hope How-Huan Chen, Jaime E. Pineda, Alyssa A. Goodman +22
We present the observation and analysis of newly discovered coherent structures in the L1688 region of Ophiuchus and the B18 region of Taurus. Using data from the Green Bank Ammoni…
Census of blue stars in SDSS DR8
Samantha Scibelli, Heidi Jo Newberg, Jeffrey L. Carlin +1
We present a census of the 12,060 spectra of blue objects () in the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8). As part of the data release, all of the spe…