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200 papers

With the goal to study the physical and chemical evolution of ices in solar-mass systems, a spectral survey is conducted of a sample of 41 low luminosity YSOs using 3-38 um Spitzer and ground-based spectra. The long-known 6.0 and 6.85 um…

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

Extensive surveys of star-forming regions with Spitzer have revealed populations of disk-bearing young stellar objects. These have provided crucial constraints, such as the timescale of dispersal of protoplanetary disks, obtained by…

Solar and Stellar Astrophysics · Physics 2018-07-04 C. F. Manara , T. Prusti , F. Comeron , R. Mor , J. M. Alcala , T. Antoja , S. Facchini , D. Fedele , A. Frasca , T. Jerabkova , G. Rosotti , L. Spezzi , L. Spina

We investigate the distribution of different classes of spectroscopically identified sources and theoretical models in the color-color diagrams (CCDs) combining the near-infrared (NIR) and mid-infrared (MIR) data to develop a method to…

Solar and Stellar Astrophysics · Physics 2016-08-24 Ryszard Szczerba , Natasza Siódmiak , Aleksandra Leśniewska , Agata Karska , Marta Sewiło

Arcuate infrared nebulae are ubiquitous throughout the Galactic Plane and are candidates for partial shells, bubbles, or bowshocks produced by massive runaway stars. We tabulate infrared photometry for 709 such objects using images from the…

We present the first results from a 124 night J, H, K near-infrared monitoring campaign of the dark cloud L 1003 in Cygnus OB7, an active star-forming region. Using 3 seasons of UKIRT observations spanning 1.5 years, we obtained…

Solar and Stellar Astrophysics · Physics 2015-06-05 Thomas S. Rice , Scott J. Wolk , Colin Aspin

Embedded Young Stellar Objects (YSO) in dense interstellar clouds is treated self-consistently to understand their spectral energy distributions (SED). Radiative transfer calculations in spherical geometry involving the dust as well as the…

Astrophysics · Physics 2009-10-31 Bhaswati Mookerjea , S. K. Ghosh

We investigate the young stellar objects (YSOs) in the Lynds~1641 (L1641) cloud using multi-wavelength data including Spitzer, WISE, 2MASS, and XMM covering ~1390 YSOs across a range of evolutionary stages. In addition, we targeted a…

Solar and Stellar Astrophysics · Physics 2015-06-15 Min Fang , Jinyoung Serena Kim , Roy van Boekel , Aurora Sicilia-Aguilar , Thomas Henning , Kevin Flaherty

We present a catalog of 652 young stellar objects (YSOs) in the Carina star-forming region. The catalog was constructed by combining near-infrared Ks-band variability from the VISTA Variables in the Via Lactea eXtended survey and…

AGBs and YSOs often share the same domains in IR color-magnitude or color-color diagrams leading to potential mis-classification. We extracted a list of AGB interlopers from the published YSO catalogues using the periodogram analysis on…

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

Since 2003, the Spitzer Space Telescope has provided groundbreaking views of Galactic star formation in bands from 3.6 past 24 microns. During the cryogenic mission (the first 5.5 years), variability of young stars at these bands was noted,…

Solar and Stellar Astrophysics · Physics 2015-03-18 L. M. Rebull

In this paper an extensive survey of the star forming complex Sh2-252 has been undertaken with an aim to explore its hidden young stellar population as well as to understand the structure and star formation history. This complex is composed…

Solar and Stellar Astrophysics · Physics 2015-06-15 Jessy Jose , A. K. Pandey , M. R. Samal , D. K. Ojha , K. Ogura , J. S. Kim , N. Kobayashi , A. Goyal , N. Chauhan , C. Eswaraiah

We introduce a binary classification model, {\it the Double Filter Model}, utilizing various machine learning and deep learning methods to classify Young Stellar Objects (YSOs) and Asymptotic Giant Branch (AGB) stars. Since YSOs and AGB…

Solar and Stellar Astrophysics · Physics 2025-11-27 Hyunwook Jheonn , Jeong-Eun Lee , Jinho Lee , Seonjae Lee , Hyeyoon Lee , ShinGeon Kim , Carlos Contreras Peña , Mi-Ryang Kim

The most recently formed young stellar objects (YSOs) in active star forming regions are excellent tracers of their parent cloud motion. Their positions and dynamics provide insight into cluster formation and constrain kinematic decoupling…

We report the results of visual spectroscopy, mid-infrared (MIR) mapping and photometry, and near-infrared photometry of two candidate symbiotic stars (IPHAS J193108.67+164950.5 and IPHAS J193709.65+202655.7) associated with extended MIR…

Astrophysics of Galaxies · Physics 2010-02-11 J. P. Phillips , J. A. Perez-Grana , G. Ramos-Larios , S. Velasco-Gas

UCHII regions are an important phase in the formation and early evolution of massive stars and a key component of the interstellar medium. The main objectives of this work are to study the young stellar objects (YSOs) associated with the…

Solar and Stellar Astrophysics · Physics 2022-06-01 Naira Azatyan , Elena Nikoghosyan , Hayk Harutyunian , Daniel Baghdasaryan , Derenik Andreasyan

As a part of the Milky Way Imaging Scroll Painting (MWISP) survey, we performed a simultaneous 12CO(1-0), 13CO(1-0), C18O(1-0) mapping toward molecular clouds in a region encompassing 3.75 square degrees. We reveal three molecular clouds,…

Astrophysics of Galaxies · Physics 2016-03-30 Y. Gong , R. Q. Mao , M. Fang , S. B. Zhang , Y. Su , J. Yang , Z. B. Jiang , Y. Xu , M. Wang , Y. Wang , D. R. Lu , J. X. Sun

The results of a deep mid-IR ISOCAM survey of the L1551 dark molecular cloud are presented. The aim of this survey is a search for new YSO (Young Stellar Object) candidates, using two broad-band filters centred at 6.7 and 14.3 micron.…