Results 41 to 50 of about 25,277 (239)

Pulsed accretion in a variable protostar [PDF]

Nature, 2013
Periodic increases in luminosity arising from variable accretion rates have been predicted for some close pre-main sequence binary stars as they grow from circumbinary disks. The phenomenon is known as "pulsed accretion" and can affect the orbital evolution and mass distribution of young binaries, as well as the potential for planet formation in the ...
Muzerolle, James, Furlan, Elise, Flaherty, Kevin, Balog, Zoltan, Gutermuth, Robert   +4 more
openaire   +3 more sources

An empirical model for protostellar collapse [PDF]

, 2000
We propose a new analytic model for the initial conditions of protostellar collapse in relatively isolated regions of star formation. The model is non-magnetic, and is based on a Plummer-like radial density profile as its initial condition.
Ward-Thompson, D., Whitworth, A. P.
core   +2 more sources

Molecular richness in protostars: Lessons learnt from spectral observations [PDF]

EPJ Web of Conferences, 2022
The gas associated with the early stages of star formation contains traces of a large variety of molecular species, many of which are organic in nature. Interestingly, we observe a substantial chemical diversity among protostars, with some objects being ...
López-Sepulcre Ana, Bouvier Mathilde
doaj   +1 more source

A radiation driven implosion model for the enhanced luminosity of protostars near HII regions [PDF]

, 2006
Context. Molecular clouds near the H II regions tend to harbor more luminous protostars. Aims. Our aim in this paper is to investigate whether or not radiation-driven implosion mechanism enhances luminosity of protostars near regions of high-ionizing ...
Belloche, Bertoldi, Bertoldi, Bonnor, Boss, Canto, Deharveng, Dobashi, Elmegreen, Fukuda, Getman, H. Shang, K. Motoyama, Kessel-Deynet, Lee, Lefloch, Miao, Motoyama, Pavlakis, Sandell, Shu, Sugitani, Sugitani, T. Umemoto, Thompson, Vacca, White, Whitworth, Whitworth, Williams, Yamaguchi   +30 more
core   +3 more sources

Observations of phosphorus-bearing molecules in the interstellar medium

Frontiers in Astronomy and Space Sciences
The chemistry of phosphorus (31P) in space is particularly significant due to the key role it plays in biochemistry on Earth. Utilising radio and infrared spectroscopic observations, several key phosphorus-containing molecules have been detected in ...
Francesco Fontani, Francesco Fontani, Francesco Fontani   +2 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). X. Compact Disks, Extended Infall, and a Fossil Outburst in the Class I Oph IRS43 Binary

The Astrophysical Journal, 2023
We present the first results from the Early Planet Formation in Embedded Disks Atacama Large Millimeter/submillimeter Array Large Program toward Oph IRS43, a binary system of solar mass protostars. The 1.3 mm dust continuum observations resolve a compact
Suchitra Narayanan, Jonathan P. Williams, John J. Tobin, Jes K. Jørgensen, Nagayoshi Ohashi, Zhe-Yu Daniel Lin, Merel L. R. van’t Hoff, Zhi-Yun Li, Adele L. Plunkett, Leslie W. Looney, Shigehisa Takakuwa, Hsi-Wei Yen, Yusuke Aso, Christian Flores, Jeong-Eun Lee, Shih-Ping Lai, Woojin Kwon, Itziar de Gregorio-Monsalvo, Rajeeb Sharma, Chang Won Lee   +19 more
doaj   +1 more source

Variable Accretion Rates and Fluffy First Stars [PDF]

, 2012
We combine the output of hydrodynamical simulations of Population III star cluster formation with stellar evolution models, and calculate the evolution of protostars experiencing variable mass accretion rates due to interactions within a massive disk. We
Baraffe, Baraffe, Bate, Baumgardt, Bonnell, Bromm, Clark, Clark, Federrath, Fryer, Girichidis, Greif, Hilditch, Hosokawa, Hosokawa, Hosokawa, Hosokawa, Jappsen, Kazuyuki Omukai, Krumholz, Lajoie, Mac Low, Machida, Machida, McKee, Offner, Omukai, Omukai, Peters, Prieto, Ralf S. Klessen, Rowan J. Smith, Schmeja, Simon C. O. Glover, Smith, Stacy, Stacy, Stahler, Takashi Hosokawa, Tan, Turk, Vorobyov, Woosley, Wuchterl   +43 more
core   +1 more source

A Keplerian Circumbinary Disk around the Protobinary System L1551 NE [PDF]

, 2012
We present SubMillimeter-Array observations of a Keplerian disk around the Class I protobinary system L1551 NE in 335 GHz continuum emission and submillimeter line emission in 13CO (J=3-2) and C18O (J=3-2) at a resolution of ~120 x 80 AU.
Andrews, Andrews, Bate, Chen, Crutcher, Delfosse, Duquennoy, Enoch, Enoch, Froebrich, Fuller, Guilloteau, Guilloteau, Harvey, Harvey, Hayashi, Ho, Hogerheijde, Jeremy Lim, Kazuya Saigo, Lim, Loinard, Looney, Looney, Machida, Machida, Machida, Masao Saito, Mathieu, Mellon, Mellon, Momose, Moriarty-Schieven, Moriarty-Schieven, Nimesh A. Patel, Ochi, Ohashi, Ossenkopf, Reipurth, Reipurth, Rodríguez, Sault, Schaefer, Shigehisa Takakuwa, T. K. Sridharan, Takakuwa, Takakuwa, Takakuwa, Vorobyov, Yen, Yen, Yokogawa   +51 more
core   +3 more sources

A Mid-Infrared Study of the Class 0 Cluster in LDN 1448 [PDF]

, 2005
We present ground-based mid-infrared observations of Class 0 protostars in LDN 1448. Of the five known protostars in this cloud, we detected two, L1448N:A and L1448C, at 12.5, 17.9, 20.8, and 24.5 microns, and a third, L1448 IRS 2, at 24.5 microns.
Bachiller R., Bachiller R., Bachiller R., Bachiller R., Bachiller R., Bontemps S., David M. Cole, Eisloffel J., Grace Wolf-Chase, Guilloteau S., Hildebrand R., JoAnn C. O'Linger, Michael E. Ressler, Neckel T., Saraceno P., Volgnau N.   +15 more
core   +2 more sources

Safety of selective IL‐23p19 inhibitors for the treatment of psoriasis

Journal of the European Academy of Dermatology and Venereology, Volume 33, Issue 9, Page 1676-1684, September 2019., 2019
Abstract Psoriasis is a chronic disease that requires long‐term treatment. Consequently, understanding the safety and tolerability of any potential treatment over time is critical to effective prescribing. The biologic agents currently available for the treatment of psoriasis target a number of different inflammatory cytokines involved in psoriasis ...
J.J. Crowley, R.B. Warren, J.C. Cather
wiley   +1 more source