Results 71 to 80 of about 12,684 (325)

CHARACTERIZING SPIRAL ARM AND INTERARM STAR FORMATION [PDF]

The Astrophysical Journal, 2016
ABSTRACT Interarm star formation contributes significantly to a galaxy’s star formation budget and provides an opportunity to study stellar birthplaces unperturbed by spiral arm dynamics. Using optical integral field spectroscopy of the nearby galaxy NGC 628 with VLT/MUSE, we construct Hα maps including detailed corrections for dust ...
Kreckel, K., Blanc, G. A., Schinnerer, E., Groves, B., Adamo, A., Hughes, A., Meidt, S.   +6 more
openaire   +5 more sources

Blobs, spiral arms, and a possible planet around HD 169142 [PDF]

Astronomy & Astrophysics, 2019
Context. Young planets are expected to cause cavities, spirals, and kinematic perturbations in protostellar disks that may be used to infer their presence.
R. Gratton, R. Ligi, E. Sissa, S. Desidera, D. Mesa, M. Bonnefoy, G. Chauvin, A. Cheetham, M. Feldt, A. Lagrange, M. Langlois, M. Meyer, M. Meyer, A. Vigan, A. Boccaletti, M. Janson, C. Lazzoni, A. Zurlo, J. D. Boer, T. Henning, V. D’Orazi, L. Gluck, F. Madec, M. Jaquet, P. Baudoz, D. Fantinel, A. Pavlov, F. Wildi   +27 more
semanticscholar   +1 more source

Massive Stars in the Nuclei and Arms of Spirals [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractMany of the properties of massive stars in external galaxies, such as chemical compositions, mass functions, and ionizing fluxes, can be derived from the study of the associated clouds of ionized gas. Moreover, the signatures of Wolf-Rayet stars are often detected in the spectra of extragalactic H ii regions.
openaire   +2 more sources

ON THE NATURE OF THE LOCAL SPIRAL ARM OF THE MILKY WAY [PDF]

The Astrophysical Journal, 2013
Trigonometric parallax measurements of nine water masers associated with the Local arm of the Milky Way were carried out as part of the BeSSeL Survey using the VLBA. When combined with 21 other parallax measurements from the literature, the data allow us to study the distribution and 3-dimensional motions of star forming regions in the spiral arm over ...
Xu, Y., Li, J. J., Reid, M. J., Menten, K. M., Zheng, X. W., Brunthaler, A., Moscadelli, L., Dame, T. M., Zhang, B.   +8 more
openaire   +2 more sources

Spiral Arms Around a Star: Geometric Explanation

, 2022
Recently, astronomers discovered spiral arms around a star. While their shape is similar to the shape of the spiral arms in the galaxies, however, because of the different scale, galaxy-related physical explanations of galactic spirals cannot be directly
Puebla, Juan L., Kreinovich, Vladik
core  

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

The Distribution of Open Clusters in the Galaxy

Frontiers in Astronomy and Space Sciences, 2021
In this work we explore the new catalog of galactic open clusters that became available recently, containing 1,750 clusters that have been re-analyzed using the Gaia DR2 catalog to determine the stellar memberships.
Hektor Monteiro, Douglas A. Barros, Wilton S. Dias, Jacques R. D. Lépine   +3 more
doaj   +1 more source

Measuring Spiral Arm Torques: Results for M100 [PDF]

The Astronomical Journal, 1995
Uuencoded compressed PostScript (300k) - 26 pages, figs. 3-9; submitted to AJ. Full PostScript version (with all figures) is available through anonymous ftp at ftp://astro.princeton.edu/ognedin/Torque/paper.ps or ftp://astro.princeton.edu/library/preprints/pop613.ps.Z or through WWW http://www.astro.princeton.edu/~library/prep ...
GNEDIN, OY, GOODMAN, J, FREI, Z
openaire   +3 more sources

Star Formation in Spiral Arms

, 2011
The origin and types of spiral arms are reviewed with an emphasis on the connections between these arms and star formation. Flocculent spiral arms are most likely the result of transient instabilities in the gas that promote dense cloud formation, star ...
B.G. Elmegreen
core   +1 more source

The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome

FEBS Letters, EarlyView.
This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley   +1 more source