Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Kalevi Mattila"'
Autor:
Kalevi Mattila, Petri Vaisanen
The Extragalactic Background Light (EBL) stands for the mean surface brightness of the sky as we would see it from a representative vantage point in the intergalactic space outside of our Milky Way Galaxy. Averaged over the whole 4 pi solid angle it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a8b7b0d4b026e61f03dda529edac6b3
http://hdl.handle.net/10138/305273
http://hdl.handle.net/10138/305273
Publikováno v:
Astronomy & Astrophysics. 645:A36
An intriguing silhouette of a small dust patch can be seen against the disk of the S0 galaxy NGC 3269 in the Antlia cluster in optical images. The images do not provide any clue as to whether the patch is a local Jupiter mass-scale cloudlet or a larg
Publikováno v:
Tampere University
This paper represents a systematic way for generation of Aaria, a simulated model for serial manipulators for the purpose of kinematic or dynamic analysis with a vast variety of structures based on Simulink SimMechanics. The proposed model can receiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a121c01d4573fdc0870d3e7ccc3288c
http://arxiv.org/abs/1803.00532
http://arxiv.org/abs/1803.00532
Autor:
Petri Väisänen, Martin Haas, Kalevi Mattila, Y.-S. Jo, L. K. Haikala, Christoph Leinert, Kimmo Lehtinen
Publikováno v:
Astronomy and Astrophysics
Photometry of the nebulae LDN1780, LDN1642 and LBN406 is used to derive scattering properties of dust and to investigate the presence of UV fluorescence emission by molecular hydrogen and the extended red emission (ERE). We used multi-wavelength opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87525d804edd1e098792881afc201947
Autor:
Gerhard F. O. von Appen-Schnur, Kalevi Mattila, Petri Vaisanen, K. Lehtinen, Christoph Leinert
Publikováno v:
Proceedings of the International Astronomical Union. 7:429-436
The Extragalactic Background Light (EBL) at UV, optical and NIR wavelengths consists of the integrated light of all unresolved galaxies along the line of sight plus any contributions by intergalactic matter including hypothetical decaying relic parti
Autor:
Kalevi Mattila, Jari Kotilainen, Andreas Efstathiou, Mika Juvela, Petri Väisänen, Jere Kahanpää
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 401:1587-1601
We present follow-up observations of the far-infrared (FIR) sources at 90, 150 and 180 mu detected as part of the ISOPHOT EBL project, which has recently measured the absolute surface brightness of the cosmic infrared background radiation (CIRB) for
Publikováno v:
Astronomy & Astrophysics. 466:969-976
Our aim is to compare the infrared properties of big, ``classical'' dust grains with visual extinction in the cloud L1642. In particular, we study the differences of grain emissivity between diffuse and dense regions in the cloud. The far-infrared pr
Publikováno v:
Astronomy & Astrophysics. 431:149-163
The Chamaeleon I dark cloud (Cha I} has been mapped in C18O J=1-0 with an angular resolution of 1 arcmin using the SEST telescope. The large scale structures previously observed with lower spatial resolution in the cloud turn into a network of clumpy
Publikováno v:
Astronomy & Astrophysics. 420:533-546
Three prominent cold objects of the Taurus Molecular Ring (TMR) were revealed by our ISOPHOT 200 µ mm ap of the south-eastern part of the Heiles Cloud 2 (HCL 2) cloud complex. One corresponds to the cyanopolyyne peak region of the TMC-1 ridge, (TMC-
Publikováno v:
Astronomy & Astrophysics. 414:69-78
We present global IR properties of the Small Magellanic Cloud using an ISOPHOT 170 µm map and re-visited IRAS data. The integrated 170 µm flux is 14 950 ± 2300 Jy, and the integrated IR flux is F1−1000 = 7.48 × 10 −10 Wm −2 . Discrete sourc