Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Aleks Scholz"'
Autor:
Aleks Scholz, Koraljka Muzic, Victor Almendros-Abad, Antonella Natta, Dary Ruiz-Rodriguez, Lucas Cieza, Cristina Rodriguez-Lopez
Publikováno v:
The Open Journal of Astrophysics, Vol 7 (2024)
We report on a search for variability in the young brown dwarf SST1624 ($\sim$M7 spectral type, $M\sim 0.05\,M_{\odot}$), previously found to feature an expanding gaseous shell and to undergo quasi-spherical mass loss. We find no variability on times
Externí odkaz:
https://doaj.org/article/c70ac9afcd314f67963f303d2bbfb963
Autor:
Adam B. Langeveld, Aleks Scholz, Koraljka Mužić, Ray Jayawardhana, Daniel Capela, Loïc Albert, René Doyon, Laura Flagg, Matthew de Furio, Doug Johnstone, David Lafrèniere, Michael Meyer
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 179 (2024)
The discovery and characterization of free-floating planetary-mass objects (FFPMOs) is fundamental to our understanding of star and planet formation. Here we report results from an extremely deep spectroscopic survey of the young star cluster NGC1333
Externí odkaz:
https://doaj.org/article/1a7cf3a31e2e4287bf759d54d5eb0212
Publikováno v:
The Astronomical Journal, Vol 165, Iss 5, p 196 (2023)
We report on a sensitive infrared search for disks around isolated young planetary-mass objects (PMOs) in the NGC 1333 cluster, by stacking 70 Spitzer/IRAC frames at 3.6 and 4.5 μ m. Our coadded images go >2.3 mag deeper than single-epoch frames, an
Externí odkaz:
https://doaj.org/article/73db79a5225449079315efb7b62c70cf
Publikováno v:
The Open Journal of Astrophysics, Vol 3 (2020)
We report the discovery of a deep, singular eclipse of the bona fide brown dwarf Roque 12, a substellar member of the Pleiades. The eclipse was 0.6mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002. No further
Externí odkaz:
https://doaj.org/article/94fc2885cdf54d46a29964b826fc72d2
Free-floating (or rogue) planets are planets that are liberated (or ejected) from their host systems. Although simulations predict their existence in substantial numbers, direct observational evidence for free-floating planets with masses below ~5 MJ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd242fbef884683ccde252476f67c824
We present measurements of spot properties on 31 young stellar objects, based on multi-band data from the HOYS (Hunting Outbursting Young Stars) project. On average the analysis for each object is based on 270 data points during 80 days in at least 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bcb8932c5ee2697c451536320436d03
Autor:
Jonathan M. C. Rawlings, Helen Kirk, Dipen Sahu, Oscar Morata, Samuel Pearson, Yuri Aikawa, James Lane, Aashish Gupta, Jaehan Bae, Fujun Du, Shu-ichiro Inutsuka, Daniel Harsono, Geumsook Park, Giseon Baek, Yi-Jehng Kuan, Geoffrey C. Bower, Gregory J. Herczeg, Spencer Plovie, Aleks Scholz, Doug Johnstone, Chin-Fei Lee, Zhen Guo, Hsien Shang, Hyunju Yoo, Graham S. Bell, Jeong-Eun Lee, Yong-Hee Lee, Carlos Contreras-Peña, Woojin Kwon, Paula S. Teixeira, Sheng-Yuan Liu, Gerald H. Moriarty-Schieven, Bhavana Lalchand, Somnath Dutta, Jan Forbrich, Ziyan Xu, Shih-Yun Tang, Huei-Ru Vivien Chen, Dimitris Stamatellos, Jennifer Hatchell, Colton Broughton, Tim Naylor, Wen Ping Chen, Yao-Te Wang, Tanvi Sharma, Tyler L. Bourke, Andy Pon, Steve Mairs, Shih-Ping Lai, Logan Francis, Miju Kang, Scott Chapman, Tie Liu
We present the four-year survey results of monthly submillimeter monitoring of eight nearby ($< 500 $pc) star-forming regions by the JCMT Transient Survey. We apply the Lomb-Scargle Periodogram technique to search for and characterize variability on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e4f1c59752b69b4df00540c0289c176
https://clok.uclan.ac.uk/42661/1/Lee_2021_ApJ_920_119.pdf
https://clok.uclan.ac.uk/42661/1/Lee_2021_ApJ_920_119.pdf
Autor:
Alejandra Traspas Munia, Igor Kudzej, Geoffrey Stone, Mark C. Price, P. Mikołajczyk, S. J. Billington, Barry Merrikin, Alfred Kume, Carys Herbert, Mario Morales Aimar, Esteban Fernández Mañanes, Steve Rau, Timothy P. Long, Tarik Zegmott, Franky Dubois, Bringfried Stecklum, Tim Nelson, Tonny Vanmunster, George Fleming, Efthymia Derezea, Nick Quinn, Rafael Gonzalez Farfán, Krzysztof Kotysz, Klaas Wiersema, Rafael Castillo García, Francisco C. Soldán Alfaro, Georg Piehler, Domenico Licchelli, Mark M. Phillips, Jochen Eislöffel, Jack J. Evitts, T. Killestein, Heinz-Bernd Eggenstein, Michael A. Heald, Diego Rodríguez, Pavol A. Dubovský, Thomas Urtly, Marc Deldem, Erik Schwendeman, D. Moździerski, Aleks Scholz, Katarzyna Kowalska, Siegfried Vanaverbeke, J. Campbell-White, Niall Miller, Ludwig Logie, Dirk Froebrich, S. V. Makin, Roger D. Pickard, Lord Dover, Stephen R. L. Futcher, Tony Vale, Stephen Johnstone
Studying rotational variability of young stars is enabling us to investigate a multitude of properties of young star-disk systems. We utilise high cadence, multi-wavelength optical time series data from the Hunting Outbursting Young Stars citizen sci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::307f9345f22fe82de46de2cc5f9a1929
https://hdl.handle.net/10023/24057
https://hdl.handle.net/10023/24057
We present spectroscopic follow-up observations of 68 red, faint candidates from our multi-epoch, multi-wavelength, previously published survey of NGC 2264. Using near-infrared spectra from VLT/KMOS, we measure spectral types and extinction for 32 yo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aed25dfdf62cc55904554ecbed32d1eb
https://hdl.handle.net/10023/24020
https://hdl.handle.net/10023/24020
We use photometric and kinematic data from Gaia DR2 to explore the structure of the star forming region associated with the molecular cloud of Perseus. Apart from the two well known clusters, IC 348 and NGC 1333, we present five new clustered groups
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf9ed49e86a96a5fc07dcd94505d1ed5
https://hdl.handle.net/10023/21480
https://hdl.handle.net/10023/21480