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SPATIAL CLUSTERING FROM<i>GALEX</i>-SDSS SAMPLES: STAR FORMATION HISTORY AND LARGE-SCALE CLUSTERING
Heinis, Sé,bastien,Budavá,ri, Tamá,s,Szalay, Alex S.,Arnouts, Sté,phane,Aragó,n-Calvo, Miguel A.,Wyder, Ted K.,Barlow, Tom A.,Foster, Karl,Peter, Friedman G.,Martin, D. C IOP Publishing 2009 The Astrophysical journal Vol.698 No.2
Dominique Heinis,Antoine Lesuffleur,Christophe Gorecki,Philippe Gogol,Yannick Poujet 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.1
We propose an original concept of a near-field optical sensor which uses the modifications of emission properties of a vertical cavity surface-emitting laser (VCSEL) in the presence of optical feedback. The detection is based on monitoring the power modulation induced in the laser cavity by the backscattered light coming from the specimen. Test images confirm the efficiency of the proposed detection principle and its sensitivity to the polarization. We propose a massively parallel version of such microscope based on an array of VCSELs integrated with SNOM probes.
The <i>UV</i>–optical colour dependence of galaxy clustering in the local universe
Loh, Yeong-Shang,Rich, R. Michael,Heinis, Sé,bastien,Scranton, Ryan,Mallery, Ryan P.,Salim, Samir,Martin, D. Christopher,Wyder, Ted,Arnouts, Sté,phane,Barlow, Tom A.,Forster, Karl,Friedman Blackwell Publishing Ltd 2010 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.407 No.1
<P>ABSTRACT</P><P>We measure the UV-optical colour dependence of galaxy clustering in the local Universe. Using the clean separation of the red and blue sequences made possible by the <I>NUV</I>−<I>r</I> colour–magnitude diagram, we segregate the galaxies into red, blue and intermediate ‘green’ classes. We explore the clustering as a function of this segregation by removing the dependence on luminosity and by excluding edge-on galaxies as a means of a non-model dependent veto of highly extincted galaxies. We find that ξ(<I>r</I><SUB>p</SUB>, π) for both red and green galaxies shows strong redshift-space distortion on small scales – the ‘finger-of-God’ effect, with green galaxies having a lower amplitude than is seen for the red sequence, and the blue sequence showing almost no distortion. On large scales, ξ(<I>r</I><SUB>p</SUB>, π) for all three samples show the effect of large-scale streaming from coherent infall. On scales of 1 <I>h</I><SUP>−1</SUP> Mpc < <I>r</I><SUB>p</SUB> < 10 <I>h</I><SUP>−1</SUP> Mpc, the projected auto-correlation function <I>w</I><SUB>p</SUB>(<I>r</I><SUB>p</SUB>) for red and green galaxies fits a power law with slope γ∼ 1.93 and amplitude <I>r</I><SUB>0</SUB>∼ 7.5 and 5.3, compared with γ∼ 1.75 and <I>r</I><SUB>0</SUB>∼ 3.9 <I>h</I><SUP>−1</SUP> Mpc for blue sequence galaxies. Compared to the clustering of a fiducial <I>L</I>* galaxy, the red, green and blue have a relative bias of 1.5, 1.1 and 0.9, respectively. The <I>w</I><SUB>p</SUB>(<I>r</I><SUB>p</SUB>) for blue galaxies display an increase in convexity at ∼ 1 <I>h</I><SUP>−1</SUP> Mpc, with an excess of large-scale clustering. Our results suggest that the majority of blue galaxies are likely central galaxies in less massive haloes, while red and green galaxies have larger satellite fractions, and preferentially reside in virialized structures. If blue sequence galaxies migrate to the red sequence via processes like mergers or quenching that take them through the green valley, such a transformation may be accompanied by a change in environment in addition to any change in luminosity and colour.</P>
<i>GALEX</i>-SDSS CATALOGS FOR STATISTICAL STUDIES
Budavá,ri, Tamá,s,Heinis, Sé,bastien,Szalay, Alexander S.,Nieto-Santisteban, Marí,a,Gupchup, Jayant,Shiao, Bernie,Smith, Myron,Chang, Ruixiang,Kauffmann, Guinevere,Morrissey, P IOP Publishing 2009 The Astrophysical journal Vol.694 No.2
STUDYING LARGE- AND SMALL-SCALE ENVIRONMENTS OF ULTRAVIOLET LUMINOUS GALAXIES
Basu-Zych, Antara R.,Schiminovich, David,Heinis, Sebastien,Overzier, Roderik,Heckman, Tim,Zamojski, Michel,Ilbert, Olivier,Koekemoer, Anton M.,Barlow, Tom A.,Bianchi, Luciana,Conrow, Tim,Donas, Jose,F IOP Publishing 2009 The Astrophysical journal Vol.699 No.2
AKARI-SDSS-GALEX SURVEYS: SPECTRAL ENERGY DISTRIBUTIONS OF NEARBY GALAXIES
Buat, V.,Yuan, F.T.,Takeuchi, T.T.,Giovannoli, E.,Heinis, S. The Korean Astronomical Society 2012 天文學論叢 Vol.27 No.4
A sample of nearby galaxies was built from the AKARI/FIS all sky survey cross-correlated with the SDSS and GALEX surveys. The spectral energy distributions from 0.15 to 160 microns of these galaxies are analysed to study dust attenuation and star formation properties. The calibrations of the amount of dust attenuation as a function of the IR-to-UV flux ratio and the FUV-NUV colour are re-investigated: the former one is confirmed to be robust and accurate whereas the use of the FUV-NUV colour to measure dust attenuation is found highly uncertain. The current star formation rate given by the SED fitting process is compared to that directly obtained from the UV and total IR luminosities. It leads to an accurate estimate of dust heating by old stars. We emphasize the importance of such a sample as a reference for IR selected star forming galaxies in the nearby universe.
Sartoneva Reetta,Paakinaho Kaarlo,Hannula Markus,Kuismanen Kirsi,Huhtala Heini,Hyttinen Jari,Miettinen Susanna 한국조직공학과 재생의학회 2024 조직공학과 재생의학 Vol.21 No.1
Background: The reconstructive surgery of vaginal defects is highly demanding and susceptible to complications, especially in larger defects requiring nonvaginal tissue grafts. Thus, tissue engineering-based solutions could provide a potential approach to the reconstruction of vaginal defects. Methods: Here, we evaluated a novel porous ascorbic acid 2-phosphate (A2P)-releasing supercritical carbon dioxide foamed poly-L-lactide-co-ε-caprolactone (scPLCLA2P) scaffold for vaginal reconstruction with vaginal epithelial (EC) and stromal (SC) cells. The viability, proliferation, and phenotype of ECs and SCs were evaluated in monocultures and in cocultures on d 1, d 7 and d 14. Furthermore, the collagen production of SCs on scPLCLA2P was compared to that on scPLCL without A2P on d 14. Results: Both ECs and SCs maintained their viability on the scPLCLA2P scaffold in mono- and coculture conditions, and the cells maintained their typical morphology during the 14-d culture period. Most importantly, the scPLCLA2P scaffolds supported the collagen production of SCs superior to plain scPLCL based on total collagen amount, collagen I and III gene expression results and collagen immunostaining results. Conclusion: This is the first study evaluating the effect of A2P on vaginal tissue engineering, and the results are highly encouraging, indicating that scPLCLA2P has potential as a scaffold for vaginal tissue engineering. Background: The reconstructive surgery of vaginal defects is highly demanding and susceptible to complications, especially in larger defects requiring nonvaginal tissue grafts. Thus, tissue engineering-based solutions could provide a potential approach to the reconstruction of vaginal defects. Methods: Here, we evaluated a novel porous ascorbic acid 2-phosphate (A2P)-releasing supercritical carbon dioxide foamed poly-L-lactide-co-ε-caprolactone (scPLCLA2P) scaffold for vaginal reconstruction with vaginal epithelial (EC) and stromal (SC) cells. The viability, proliferation, and phenotype of ECs and SCs were evaluated in monocultures and in cocultures on d 1, d 7 and d 14. Furthermore, the collagen production of SCs on scPLCLA2P was compared to that on scPLCL without A2P on d 14. Results: Both ECs and SCs maintained their viability on the scPLCLA2P scaffold in mono- and coculture conditions, and the cells maintained their typical morphology during the 14-d culture period. Most importantly, the scPLCLA2P scaffolds supported the collagen production of SCs superior to plain scPLCL based on total collagen amount, collagen I and III gene expression results and collagen immunostaining results. Conclusion: This is the first study evaluating the effect of A2P on vaginal tissue engineering, and the results are highly encouraging, indicating that scPLCLA2P has potential as a scaffold for vaginal tissue engineering.