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We have used the Submillimeter Array for the first interferometric CO imaging toward the starburst-Seyfert nucleus of the southern barred spiral galaxy NGC 1365, which is one of the four galaxies within 30 Mpc that have L_{8-1000micron} >=…

Astrophysics · Physics 2008-11-26 Kazushi Sakamoto , Paul T. P. Ho , Rui-Qing Mao , Satoki Matsushita , Alison B. Peck

We study the fraction of the intra-cluster light (ICL) formed in-situ in the three most massive clusters of the TNG50 simulation, with virial masses $\sim 10^{14}$ M$_{\odot}$. We find that a significant fraction of ICL stars ($8\%$-$28\%$)…

Astrophysics of Galaxies · Physics 2024-12-10 Niusha Ahvazi , Laura V. Sales , Julio F. Navarro , Andrew Benson , Alessandro Boselli , Richard D'Souza

It is well known that most of the stars form in rich clusters. However, recent $Spitzer$ observations have shown that a significant number of stars also form in distributed mode, origin of which is not well understood. In this work, we aim…

Solar and Stellar Astrophysics · Physics 2019-02-20 Neelam Panwar , Manash R. Samal , A. K. Pandey , H. P . Singh , Saurabh Sharma

We report the discovery of a dense molecular ring-like structure in a dense (10$^5$ cm$^{-3}$), cold (pc-scale CO depletion at a factor of 5), and young (10$^4$ year) star-forming region G34.74-0.12, revealed by C$^{18}$O (2-1), HNC (1-0),…

We studied the HST-WFPC2 observations of the inner kpc of the interacting galaxy M51 in six bands from 2550 to 8140 Angstrom. The images show an oval shaped area ("bulge") of 11x16 arcsec or 450x650 pc around the nucleus, dominated by a…

Understanding the characteristics of young stellar populations is essential for deriving insights into star formation processes within parent molecular clouds and the influence of massive stars. This study focuses on YSOs in the G…

Astrophysics of Galaxies · Physics 2024-06-10 N. Azatyan , E. Nikoghosyan , A. Samsonyan , D. Elia , L. Kaper , A. Yeghikyan , D. Andreasyan , D. Baghdasaryan

Filamentary structures are ubiquitously seen in the interstellar medium. The concentrated molecular mass in the filaments allows fragmentation to occur in a shorter timescale than the timescale of the global collapse. Such hierarchical…

Solar and Stellar Astrophysics · Physics 2015-06-05 Hauyu Baobab Liu , Izaskun Jiménez-Serra , Paul T. -P. Ho , Huei-Ru Chen , Qizhou Zhang , Zhi-Yun Li

To probe the star formation (SF) process, we present a multi-wavelength study of IRAS 05480+2545 (hereafter I05480+2545). Analysis of Herschel data reveals a massive clump (M_clump ~ 1875 Msun; peak N(H_2) ~ 4.8 x 10^{22} cm^{-2}; A_V ~ 51…

Astrophysics of Galaxies · Physics 2017-07-26 Lokesh K. Dewangan , Devendra K. Ojha , Tapas Baug

The luminous Young Stellar Object (YSO) IRAS 07422-2001 is studied in the infrared. We discover star forming activity in embedded clusters located in a cloud detected at mid-IR wavelengths in emission. Multiple outflows are discovered from…

Solar and Stellar Astrophysics · Physics 2015-06-04 Watson P. Varricatt

Herein, we present the 12CO (J=1-0) and 13CO (J=1-0) emission line observations via the FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) toward a Spitzer bubble N4. We observed clouds of three discrete…

We investigate radiative feedback from a 34 M$_\odot$ star in a $10^4$ M$_\odot$ turbulent cloud using three-dimensional radiation-hydrodynamics (RHD) models. We use Monte Carlo radiative transfer to accurately compute photoionization…

Astrophysics of Galaxies · Physics 2019-06-26 Ahmad A. Ali , Tim J. Harries

We present a uniform mid-infrared imaging and photometric survey of 36 young, nearby, star-forming clusters and groups using {\it Spitzer} IRAC and MIPS. We have confidently identified and classified 2548 young stellar objects using…

Solar and Stellar Astrophysics · Physics 2009-08-25 R. A. Gutermuth , S. T. Megeath , P. C. Myers , L. E. Allen , J. L. Pipher , G. G. Fazio

(Abridged) Bright-rimmed clouds (BRCs) are isolated molecular clouds located on the edges of evolved HII regions where star formation is thought may have been triggered. In this paper we investigate the current level of star formation…

Astrophysics of Galaxies · Physics 2009-11-13 J. S. Urquhart , L. K. Morgan , M. A. Thompson

The filamentary infrared dark cloud L1287 is actively forming a dense cluster of low-mass YSOs at its inner $\sim$0.1 pc region. To help understand the origin of this low-mass YSO cluster, the present work aims at resolving the gas…

Solar and Stellar Astrophysics · Physics 2019-01-23 Carmen Juárez , Hauyu-Baobab Liu , Josep M. Girart , Aina Palau , Gemma Busquet , Roberto Galván-Madrid , Naomi Hirano , Yuxin Lin

The recent identification of several groups of young stars within 100 parsecs of the Sun has generated widespread interest. Given their proximity and possible age differences, these systems are ideally suited for detailed studies of star…

We study the formation of star clusters in molecular clouds by performing three-dimensional radiation hydrodynamics simulations with far ultraviolet (FUV; $6 ~{\rm eV} \leqq h \nu \leqq 13.6 ~{\rm eV}$) and extreme ultraviolet (EUV; $h\nu…

Astrophysics of Galaxies · Physics 2022-02-09 Hajime Fukushima , Hidenobu Yajima

We present near-infrared spectroscopy and 1 mm line and continuum observations of a recently identified site of high mass star formation likely to be located in the Central Molecular Zone near Sgr C. Located on the outskirts of the massive…

To shed light on the time evolution of local star formation episodes in M33, we study the association between 566 Giant Molecular Clouds (GMCs), identified through the CO (J=2-1) IRAM-all-disk survey, and 630 Young Stellar Cluster…

We present 737 candidate Young Stellar Objects (YSOs) near the W51 Giant Molecular Cloud (GMC) over an area of 1.25 deg x 1.00 deg selected from Spitzer Space Telescope data. We use spectral energy distribution (SED) fits to identify YSOs…

Astrophysics of Galaxies · Physics 2014-11-20 Miju Kang , John H. Bieging , Matthew S. Povich , Youngung Lee

We present far-infrared observations of Monoceros R2 (a giant molecular cloud at approximately 830 pc distance, containing several sites of active star formation), as observed at 70 {\mu}m, 160 {\mu}m, 250 {\mu}m, 350 {\mu}m, and 500 {\mu}m…