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Related papers: Climbing the Cliffs: Classifying YSOs in the Cosmi…

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The HII complex N44 in the Large Magellanic Cloud (LMC) provides an excellent site to perform a detailed study of star formation in a mild starburst, as it hosts three regions of star formation at different evolutionary stages and it is not…

Astrophysics of Galaxies · Physics 2014-11-18 C. -H. Rosie Chen , You-Hua Chu , Robert A. Gruendl , Karl D. Gordon , Fabian Heitsch

The results of the searching on the bases of GPS UKIDSS survey's data of dense compact stellar clusters in the vicinity of 20 YSOs with high and middle masses are presented. Totally we have revealed clusters in 13 areas. Around 5 objects…

Solar and Stellar Astrophysics · Physics 2015-12-29 N. M. Azatyan , E. H. Nikoghosyan

We apply machine learning algorithms to classify Infrared (IR)-selected targets for NASA's upcoming SPHEREx mission. In particular, we are interested in classifying Young Stellar Objects (YSOs), which are essential for understanding the…

Solar and Stellar Astrophysics · Physics 2023-09-25 K. Lakshmipathaiah , S. Vig , Matthew L. N. Ashby , Joseph L. Hora , Miju Kang , Rama Krishna Sai S. Gorthi

The past decade has seen a rise in the use of Machine Learning methods in the study of young stellar evolution. This trend has led to a growing need for a comprehensive database of young stellar objects (YSO) that goes beyond…

Solar and Stellar Astrophysics · Physics 2025-10-08 J. Roquette , M. Audard , D. Hernandez , I. Gezer , G. Marton , C. Mas , M. Madarász , O. Dionatos

We present a spectroscopic follow-up of photometrically-selected young stellar object (YSO) candidates in the Central Molecular Zone of the Galactic center. Our goal is to quantify the contamination of this YSO sample by reddened giant…

On July 13, 2022, NASA released to the whole world the data obtained by the James Webb Space Telescope (JWST) Early Release Observations (ERO). These are the first set of science-grade data from this long-awaited facility, marking the…

Astrophysics of Galaxies · Physics 2023-01-04 Haojing Yan , Zhiyuan Ma , Chenxiaoji Ling , Cheng Cheng , Jia-sheng Huang

Using infrared photometric data extracted from the 2MASS, IRAS and MSX databases, 142 suspected young stellar objects (YSOs) are selected from about 2 million stars in the Camelopardalis segment of the Milky Way limited by Galactic…

Astrophysics · Physics 2009-06-25 V. Straizys , V. Laugalys

We present the clump populations detected in 18 lensed galaxies at redshifts 1 to 8.5 within the lensing cluster field SMACS0723. The recent JWST Early Release Observations of this poorly known region of the sky have revealed numerous…

Using NIRSpec on JWST, we studied a sample of 15 intermediate-mass (1.8-4.1 Msun) young stellar objects (YSOs) previously identified with MIRI photometry in the low-metallicity NGC 346 star-forming cluster in the Small Magellanic Cloud…

We performed a deep wide-field (6.76 deg^2) near-infrared survey with the VISTA telescope that covers the entire extent of the Carina nebula complex (CNC). The point-source catalog created from these data contains around four million…

Solar and Stellar Astrophysics · Physics 2015-12-17 Peter Zeidler , Thomas Preibisch , Thorsten Ratzka , Veronica Roccatagliata , Monika G. Petr-Gotzens

Classifying and summarizing large data sets from different sky survey projects is essential for various subsequent scientific research. By combining data from 4XMM-DR13, SDSS DR18, and CatWISE, we formed an XMM-WISE-SDSS sample that…

Astrophysics of Galaxies · Physics 2024-10-16 Xiangyao Ma , Yanxia Zhang , Jingyi Zhang , Changhua Li , Zihan Kang , Ji Li

We present a comprehensive study of massive young stellar objects (YSOs) in the metal-poor galaxy NGC 6822 using IRAC and MIPS data obtained from the {\em Spitzer Space Telescope}. We find over 500 new YSO candidates in seven massive…

Astrophysics of Galaxies · Physics 2019-09-25 Olivia C. Jones , Michael J. Sharp , Megan Reiter , Alec S. Hirschauer , M. Meixner , Sundar Srinivasan

Star formation is known to occur more readily where more raw materials are available. This is often expressed by a 'Kennicutt-Schmidt' relation where the surface density of Young Stellar Objects (YSOs) is proportional to column density to…

Astrophysics of Galaxies · Physics 2021-08-13 Brendan Retter , Jennifer Hatchell , Tim Naylor

Infrared Dark Clouds are ideal laboratories to study the initial processes of high-mass star and star cluster formation. We investigated star formation activity of an unexplored filamentary dark cloud (~5.7pc x 1.9pc), which itself is part…

Astrophysics of Galaxies · Physics 2015-09-09 M. R. Samal , D. K. Ojha , J. Jose , A. Zavagno , S. Takahashi , B. Neichel , J. S. Kim , N. Chauhan , A. K. Pandey , I. Zinchenko , M. Tamura , S. K. Ghosh

We provide classifications for all 143 million non-repeat photometric objects in the Third Data Release of the Sloan Digital Sky Survey (SDSS) using decision trees trained on 477,068 objects with SDSS spectroscopic data. We demonstrate that…

Astrophysics · Physics 2008-11-26 Nicholas M. Ball , Robert J. Brunner , Adam D. Myers , David Tcheng

We review the use of young low mass stars and protostars, or young stellar objects (YSOs), as tracers of star formation. Observations of molecular clouds at visible, infrared, radio and X-ray wavelengths can identify and characterize the…

Astrophysics of Galaxies · Physics 2022-05-04 S. T. Megeath , R. A. Gutermuth , M. A. Kounkel

OB associations are home to newly formed massive stars, whose turbulent winds and ionizing flux create H II regions rich with star formation. Studying the distribution and abundance of young stellar objects (YSOs) in these ionized bubbles…

Solar and Stellar Astrophysics · Physics 2021-11-17 Abby Mintz , Joseph L. Hora , Elaine Winston

The first deep field images from the James Webb Space Telescope (JWST) of the galaxy cluster SMACS~J0723.3-7327 reveal a wealth of new lensed images at uncharted infrared wavelengths, with unprecedented depth and resolution. Here we…

With the advent of JWST, we can probe the rest-frame optical emission of galaxies at $z>3$ with high sensitivity and spatial resolution, making it possible to accurately characterise red, optically-faint galaxies and thus move towards a…

The recent discovery of objects with redshift $z>10$ with the help of James Webb Space Telescope (JWST) poses serious challenges to the $\Lambda$CDM cosmological model, which has been in vogue for some time now. The new data indicate that…

Cosmology and Nongalactic Astrophysics · Physics 2023-06-08 Moncy V. John , K. Babu Joseph