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Related papers: Young Stars in the Camelopardalis Dust and Molecul…

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We report detection of moderate to high-mass star formation in an infrared dark cloud (G11.11-0.12) where we discovered class II methanol and water maser emissions at 6.7 GHz and 22.2 GHz, respectively. We also observed the object in…

Astrophysics · Physics 2009-11-13 Thushara Pillai , Friedrich Wyrowski , Karl M. Menten , Endrik Kr"ugel

Based on a multiwavelength study, the interstellar medium and young stellar objects (YSOs) around the HII region Sh2-82 have been analyzed. Two molecular clumps were found from the archival data of the Galactic Ring Survey, and using the…

Astrophysics of Galaxies · Physics 2016-05-11 Nai-Ping Yu Jun-Jie Wang

We report the discovery and characterization of a power law correlation between the local surface densities of Spitzer-identified, dusty young stellar objects and the column density of gas (as traced by near-IR extinction) in eight…

Solar and Stellar Astrophysics · Physics 2015-05-28 R. A. Gutermuth , J. L. Pipher , S. T. Megeath , P. C. Myers , L. E. Allen , T. S. Allen

Using the 13.7 m telescope of Purple Mountain Observatory (PMO), a survey of J=1-0 lines of CO and its isotopes was carried out towards 98 methanol maser sources in January 2008. Eighty-five sources have infrared counterparts within one…

Solar and Stellar Astrophysics · Physics 2015-06-04 Tie Liu , Yue-Fang Wu , Ke Wang

The theory of massive star formation currently suffers from a scarce observational base of massive young stellar objects to compare with. In this paper, we present OVRO CO(1-0), 13CO(1-0), C18O(1-0), and 2.6 mm continuum images of the…

Astrophysics of Galaxies · Physics 2015-06-11 Aina Palau , Carmen Sánchez Contreras , Raghvendra Sahai , Álvaro Sánchez-Monge , J. Ricardo Rizzo

We present an all-sky sample of 984 candidate intermediate-mass Galactic star-forming regions color-selected from the Infrared Astronomical Satellite (IRAS) Point Source Catalog and morphologically classify each object using mid-infrared…

Astrophysics of Galaxies · Physics 2015-06-18 Michael J. Lundquist , Henry A. Kobulnicky , Michael J. Alexander , Charles R. Kerton , Kim Arvidsson

We report Submillimeter Array (SMA) 1.3 mm high angular resolution observations towards the four EXor type outbursting young stellar objects (YSOs) VY Tau, V1118 Ori, V1143 Ori, and NY Ori. The data mostly show low dust masses $M_{dust}$ in…

We present multi-wavelength analysis around mid-infrared bubble N14 to probe the signature of triggered star formation as well as the formation of new massive star(s) and/or cluster(s) on the borders of the bubble by the expansion of the H…

Astrophysics of Galaxies · Physics 2015-06-12 L. K. Dewangan , D. K. Ojha

It is often assumed that the strong gravitational field of a super-massive black hole disrupts an adjacent molecular cloud preventing classical star formation in the deep potential well of the black hole. Yet, young stars have been observed…

Astrophysics of Galaxies · Physics 2016-08-10 B. Jalali , F. I. Pelupessy , A. Eckart , S. Portegies Zwart , N. Sabha , A. Borkar , J. Moultaka , K. Mužić , L. Moser

This study utilized LAMOST low-resolution spectra to identify M-type YSOs and characterize their accretion signatures. We measured characteristic features, including hydrogen Balmer, Li {\sc i}, He~{\sc i}, Na {\sc i}, and Ca {\sc ii}…

Solar and Stellar Astrophysics · Physics 2025-05-20 Xiang-Song Fang , Jian-Rong Shi , Ming-Yi Ding , Zi-Huang Cao

The formation of massive stars and their arrival on the zero-age main-sequence occurs hidden behind dense clouds of gas and dust. In the giant Hii region NGC 3603, the radiation of a young cluster of OB stars has dispersed dust and gas in…

Solar and Stellar Astrophysics · Physics 2015-10-14 C. A. Hummel , T. Stanke , R. Galvan-Madrid , B. S. Koribalski

We present and categorize Spitzer IRS spectra of 294 objects in the Large Magellanic Cloud (LMC) to create the largest and most complete catalog of massive young stellar object (YSO) spectra in the LMC. Target sources were identified from…

We study stars and molecular gas in the direction of IRAS06145+1455 (WB89-789) through NIR (JHK), molecular line-, and dust continuum observations. The kinematic distance of the associated molecular cloud is 11.9 kpc. With a galactocentric…

Astrophysics · Physics 2009-11-13 J. Brand , J. G. A. Wouterloot

We conducted an infrared search for faint companions around 351 young stellar objects in the rho Ophiucus molecular cloud and the Serpens molecular cloud. Nine objects in the Spitzer/IRAC archival images were identified as young stellar…

Solar and Stellar Astrophysics · Physics 2015-05-28 Chiaki Shirono , Yoichi Itoh , Yumiko Oasa

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

The dynamics of the inner regions of young stellar objects (YSOs) is driven by a variety of physical phenomena, from magnetospheres and accretion to the dust sublimation rim and inner disk flows. These inner environments evolve on…

We are searching for Young Stellar Objects (YSOs) near the boundary between protostars and pre-main sequence objects, what we have termed transitional YSOs. We have identified a sample of 125 objects as candidate transitional YSOs on the…

Astrophysics · Physics 2007-05-23 A. W. Volp , E. A Magnier , M. E. van den Ancker , L. B. F. M. Waters

We discover two infrared objects that show deep absorption features of H2O, CO2, and CO ices in the AKARI/Infrared Camera (IRC) slit-less spectroscopic survey of the Galactic plane in 2.5--13 micron. Both objects are located neither in…

Astrophysics of Galaxies · Physics 2021-08-11 Takashi Onaka , Tomoyuki Kimura , Itsuki Sakon , Takashi Shimonishi

The giant molecular cloud G216-2.5, also known as Maddalena's cloud or the Maddalena-Thaddeus cloud, is distinguished by an unusual combination of high gas mass (1-6 x 10^5) solar masses, low kinetic temperatures (10 K), and the lack of…

Astrophysics of Galaxies · Physics 2009-11-13 S. T. Megeath , E. Allgaier , E. Young , T. Allen , J. L. Pipher , T. L. Wilson

Using ISO-ISOPHOT we carried out a survey of almost 150 stars to search for evidence of emission from dust orbiting young main sequence stars, both in clusters and isolated systems. Over half of the detections are new examples of dusty…

Astrophysics · Physics 2010-03-19 C. Spangler , A. I. Sargent , M. D. Silverstone , E. E. Becklin , B. Zuckerman