197 citations · 564 across the 19 of their papers we have counts for
19 papers
The Cosmic-Ray Induced Sputtering Process On Icy Grains
Özgün Arslan, Seyit Hocuk, Paola Caselli +1
In molecular cloud cores, the cosmic ray (CR) induced sputtering via CR ion-icy grain collision is one of the desorption processes for ice molecules from mantles around dust grains…
Dust temperature and time-dependent effects in the chemistry of photodissociation regions
Gisela Esplugues, Stephanie Cazaux, Paola Caselli +2
When studying the chemistry of PDRs, time dependence becomes important as visual extinction increases, since certain chemical timescales are comparable to the cloud lifetime. Dust…
Warm dust surface chemistry. H2 and HD formation
W. F. Thi, S. Hocuk, I. Kamp +4
Molecular hydrogen (H2) is the main constituent of the gas in the planet-forming disks that surround many PMS stars. H2 can be incorporated in the atmosphere of the giant planets.…
Warm dust surface chemistry in protoplanetary disks. Formation of phyllosilicates
W. F. Thi, S. Hocuk, I. Kamp +5
The origin of the reservoirs of water on Earth is debated. The Earth's crust may contain at least three times more water than the oceans. This crust water is found in the form of p…
The first frost in the Pipe Nebula
Miwa Goto, J. D. Bailey, Seyit Hocuk +4
Spectroscopic studies of ices in nearby star-forming regions indicate that ice mantles form on dust grains in two distinct steps, starting with polar ice formation (H2O rich) and s…
Parameterizing the interstellar dust temperature
S. Hocuk, L. Szucs, P. Caselli +3
The temperature of interstellar dust particles is of great importance to astronomers. It plays a crucial role in the thermodynamics of interstellar clouds, because of the gas-dust…
Chemical fractionation of deuterium in the protosolar nebula
J. Kalvans, I. Shmeld, J. R. Kalnin +1
Understanding gas-grain chemistry of deuterium in star-forming objects may help to explain their history and present state. We aim to clarify how processes in ices affect the deute…
The role of ices in star-forming clouds
Seyit Hocuk
Ices play a critical role during the evolution of interstellar clouds. Their presence is ubiquitous in the dense molecular medium and their impact is not only limited to chemistry.…
How chemistry influences cloud structure, star formation, and the IMF
S. Hocuk, S. Cazaux, M. Spaans +1
In the earliest phases of star-forming clouds, stable molecular species, such as CO, are important coolants in the gas phase. Depletion of these molecules on dust surfaces affects…
Dust as interstellar catalyst - II. How chemical desorption impacts the gas
S. Cazaux, M. Minissale, F. Dulieu +1
Context. Interstellar dust particles, which represent 1% of the total mass, are recognized to be very powerful interstellar catalysts in star-forming regions. The presence of dust…
Dust as interstellar catalyst I. Quantifying the chemical desorption process
M. Minissale, F. Dulieu, S. Cazaux +1
Context. The presence of dust in the interstellar medium has profound consequences on the chemical composition of regions where stars are forming. Recent observations show that man…
Interplay of gas and ice during cloud evolution
S. Hocuk, S. Cazaux
During the evolution of diffuse clouds to molecular clouds, gas-phase molecules freeze out on surfaces of small dust particles to form ices. On dust surfaces, water is the main con…
The impact of freeze-out on collapsing molecular clouds
S. Hocuk, S. Cazaux, M. Spaans
Atoms and molecules, and in particular CO, are important coolants during the evolution of interstellar star-forming gas clouds. The presence of dust grains, which allow many chemic…
The impact of magnetic fields on the IMF in star-forming clouds near a supermassive black hole
S. Hocuk, D. R. G. Schleicher, M. Spaans +1
Star formation in the centers of galaxies is thought to yield massive stars with a possibly top-heavy stellar mass distribution. It is likely that magnetic fields play a crucial ro…
Star formation near an obscured AGN: Variations in the initial mass function
S. Hocuk, M. Spaans
The conditions that affect the formation of stars in radiatively and mechanically active environments are quite different than the conditions that apply to our local interstellar n…
The impact of X-rays on molecular cloud fragmentation and the IMF
S. Hocuk, M. Spaans
Star formation is regulated through a variety of feedback processes. In this study, we treat feedback by X-rays and discuss its implications. Our aim is to investigate whether star…
The asymmetric radio structure and record jet of giant quasar 4C34.47
S. Hocuk, P. D. Barthel
Giant double-lobed radio source 4C34.47 displays a straight one-sided jet, measuring a record length of 380kpc, in its double-lobed radio structure. Assuming an intrinsically symme…
The impact of metallicity and X-rays on star formation
Marco Spaans, Aycin Aykutalp, Seyit Hocuk
Star formation is regulated through a variety of feedback processes. In this study, we treat feedback by metal injection and a UV background as well as by X-ray irradiation. Our ai…
The Thermodynamics of Molecular Cloud Fragmentation: Star Formation Under Non-Milky Way Conditions
S. Hocuk, M. Spaans
Properties of candidate stars, forming out of molecular clouds, depend on the ambient conditions of the parent cloud. We present a series of 2D and 3D simulations of fragmentation…