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Browsing by Subject "ISM: clouds"

Browsing by Subject "ISM: clouds"

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  • The 3-Dimensional Distribution of Interstellar Dust 
    Murthy, J (Cambridge University Press, 2014-01)
    A knowledge of the three dimensional distribution of interstellar dust is critical in interpreting all observations of the sky, particularly in the understanding of the structure and morphology of our Galaxy. It has been ...
  • ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions – IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics 
    Liu, Hong-Li; Tej, Anandmayee; Liu, Tie; Goldsmith, Paul F; Stutz, Amelia; Juvela, Mika; Qin, Sheng-Li; Xu, Feng-Wei; Bronfman, Leonardo; Evans, Neal J; Saha, Anindya; Issac, Namitha; Tatematsu, Ken’ichi; Wang, Ke; Li, Shanghuo; Zhang, Siju; Baug, Tapas; Dewangan, Lokesh; Wu, Yue-Fang; Zhang, Yong; Lee, Chang Won; Liu, Xun-Chuan; Zhou, Jianwen; Archana Soam (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    We present a comprehensive study of the gas kinematics associated with density structures at different spatial scales in the filamentary infrared dark cloud, G034.43+00.24 (G34). This study makes use of the H13CO+ (1–0) ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – VII. A catalogue of SiO clumps from ACA observations 
    Liu, Rong; Liu, Tie; Chen, Gang; Liu, Hong-Li; Wang, Ke; Li, Jin-Zeng; Lee, Chang Won; Liu, Xunchuan; Juvela, Mika; Garay, Guido; Dewangan, Lokesh; Archana Soam; Bronfman, Leonardo; He, Jinhua; Eswaraiah, Chakali; Zhang, Si-Ju; Zhang, Yong; Xu, Feng-Wei; Tóth, L. Viktor; Shen, Zhi-Qiang; Li, Shanghuo; Wu, Yue-Fang; Qin, Sheng-Li; Ren, Zhiyuan; Zhang, Guoyin; Tej, Anandmayee; Goldsmith, Paul F; Baug, Tapas; Luo, Qiuyi; Zhou, Jianwen; Zhang, Chang (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    To understand the nature of SiO emission, we conducted ACA observations of the SiO (2-1) lines toward 146 massive starforming regions, as part of the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – XII: Fragmentation and multiscale gas kinematics in protoclusters G12.42+0.50 and G19.88−0.53 
    Saha, Anindya; Tej, Anandmayee; Liu, Hong-Li; Liu, Tie; Issac, Namitha; Lee, Chang Won; Garay, Guido; Goldsmith, Paul F; Juvela, Mika; Qin, Sheng-Li; Stutz, Amelia; Li, Shanghuo; Wang, Ke; Baug, Tapas; Bronfman, Leonardo; Xu, Feng-Wei; Zhang, Yong; Eswaraiah, Chakali (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    We present new continuum and molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) survey for the two protoclusters, G12.42+0.50 and G19.88−0.53. The 3 mm continuum maps ...
  • A census of young stellar population associated with the Herbig Be star HD 200775 
    Saha, Piyali; Maheswar, G; Kamath, U. S; Lee, C. W; Puravankara, Manoj; Mathew, B; Sharma, Ekta (Oxford University Press on behalf of the Royal Astronomical Society, 2020-06)
    The region surrounding the well-known reflection nebula, NGC 7023, illuminated by a Herbig Be star, HD 200775, located in the dark cloud L1174 is studied in this work. Based on the distances and proper motion values from ...
  • A Compilation of Interstellar Column Densities 
    Gudennavar, S. B; Bubbly, S. G; Preethi, K; Murthy, J (IOP Publishing, 2012-03)
    We have collated absorption line data toward 3008 stars in order to create a unified database of interstellar column densities. These data have been taken from a number of different published sources and include many ...
  • Components of the diffuse ultraviolet radiation at high latitudes 
    Akshaya, M. S; Murthy, J; Ravichandran, S; Henry, R. C; Overduin, J (Oxford University Press on behalf of the Royal Astronomical Society, 2019-08-08)
    We have used data from the Galaxy Evolution Explorer to study the different components of the diffuse ultraviolet background in the region between the Galactic latitudes 70◦–80◦. We find an offset at zero dust column density ...
  • Distance, magnetic field, and kinematics of the filamentary cloud LDN 1157 
    Sharma, Ekta; Maheswar, G; Archana Soam; Lee, Chang Won; Kim, Shinyoung; Ghosh, Tuhin; Anandmayee Tej; Kim, Gwanjeong; Sharma, Neha; Saha, Piyali (EDP Sciences, 2020-07)
    Context. LDN 1157 is one of several clouds that are situated in the cloud complex LDN 1147/1158. The cloud presents a coma-shaped morphology with a well-collimated bipolar outflow emanating from a Class 0 protostar, LDN ...
  • Dynamics of embedded protostar clusters in clouds 
    Gorti, U; Bhatt, H. C (Royal Astronomical Society, 1996-01)
    The dynamics of clumps and protostars in a young protocluster system embedded in its parent molecular cloud are studied here through numerical simulations. It is found that the presence of massive clumps and their dynamics ...
  • Enhanced luminosity of young stellar objects in cometary globules 
    Maheswar, G; Bhatt, H. C (Springer, 2008-06)
    In this study we investigated the effects of external trigger on the characteristics of young stellar objects (YSOs) associated with cometary globules (CGs). We made optical spectroscopy of stars associated with star-forming ...
  • Evidence of high-mass star formation through multiscale mass accretion in hub-filament-system clouds 
    Liu, Hong-Li; Tej, Anandmayee; Liu, Tie; Sanhueza, Patricio; Qin, Sheng-Li; He, Jinhua; Goldsmith, Paul F; Garay, Guido; Pan, Sirong; Morii, Kaho; Li, Shanghuo; Stutz, Amelia; Tatematsu, Ken’ichi; Xu, Feng-Wei; Bronfman, Leonardo; Saha, Anindya; Issac, Namitha; Baug, Tapas; Toth, L Viktor; Dewangan, Lokesh; Wang, Ke; Zhou, Jianwen; Lee, Chang Won; Yang, Dongting; Luo, Anxu; Shen, Xianjin; Zhang, Yong; Wu, Yue-Fang; Ren, Zhiyuan; Liu, Xun-Chuan; Archana Soam; Zhang, Siju; Luo, Qiu-Yi (Oxford University Press on behalf of Royal Astronomical Society, 2023-07)
    We present a statisticalstudy of a sample of 17 hub-filament-system (HFS) clouds of high-massstar formation using high-angular resolution (∼1–2 arcsec) ALMA 1.3 and 3 mm continuum data. The sample includes eight infrared ...
  • A High Galactic Latitude HI 21cm-line Absorption Survey using the GMRT: I. Observations and Spectra 
    Mohan, Rekhesh; Dwarakanath, K. S; Srinivasan, G (Indian Academy of Sciences, 2004-12)
    We have used the Giant Meterwave Radio Telescope (GMRT) to measure the Galactic HI 21-cm line absorption towards 102 extragalactic radio continuum sources, located at high (|b| > 15?) Galactic latitudes. The Declination ...
  • A High Galactic Latitude HI 21cm-line Absorption Survey using the GMRT: II. Results and Interpretation 
    Mohan, Rekhesh; Dwarakanath, K. S; Srinivasan, G (Indian Academy of Sciences, 2004-12)
    We have carried out a sensitive high-latitude (|b| > 15?) HI 21 cm-line absorption survey towards 102 sources using the GMRT. With a 3σ detection limit in optical depth of ?0.01, this is the most sensitive HI absorption ...
  • In fl uence of Wolf – Rayet Stars on Surrounding Star-forming Molecular Clouds 
    Baug, T; Richard de Grijs; Dewangan, L. K; Herczeg, Gregory J; Ojha, D. K; Ke Wang; Licai Deng; Bhatt, B. C (IOP Publishing, 2019-11)
    We investigate the in fl uence of Wolf – Rayet ( W-R ) stars on their surrounding star-forming molecular clouds. We study fi ve regions containing W-R stars in the inner Galactic plane ( l ∼ [ 14 ° ...
  • Investigation of Rocket Effect in BRC 18 using Gaia EDR3 
    Saha, Piyali; Maheswar, G; Ojha, D. K; Neha, Sharma (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    Bright-rimmed clouds (BRCs) are ideal candidates to study radiation-driven implosion mode of star formation as they are potential sites of triggered star formation, located at the edges of HII regions, showing evidence ...
  • Investigation of rocket effect in bright-rimmed clouds using Gaia EDR3 
    Saha, Piyali; Maheswar, G; Ojha, D. K; Baug, Tapas; Neha, Sharma (Oxford University Press on behalf of Royal Astronomical Society, 2022-09)
    Bright-rimmed clouds (BRCs) are excellent laboratories to explore the radiation-driven implosion mode of star formation because they show evidence of triggered star formation. In our previous study, BRC 18 has been found ...
  • The JCMT BISTRO Survey: multiwavelength polarimetry of bright regions in NGC 2071 in the far-infrared/submillimetre range, with POL-2 and HAWC+ 
    Fanciullo, Lapo; Kemper, Francisca; Pattle, Kate; Koch, Patrick M; Sadavoy, Sarah; Coude, Simon; Archana Soam; Hoang, Thiem; Onaka, Takashi; Gouellec, Valentin J M Le; Arzoumanian, Doris; Berry, David; Eswaraiah, Chakali; Chung, Eun Jung; Furuya, Ray; Hull, Charles L H; Hwang, Jihye; Johnstone, Douglas; Kang, Ji-hyun; Kim, Kyoung Hee; Kirchschlager, Florian; Konyves, Vera; Kwon, Jungmi; Kwon, Woojin; Lai, Shih-Ping; Lee, Chang Won; Liu, Tie; Lyo, A-Ran; Stephens, Ian; Tamura, Motohide; Tang, Xindi; Ward-Thompson, Derek; Whitworth, Anthony; Shinnaga, Hiroko (Oxford University Press on behalf of Royal Astronomical Society, 2022-05)
    Polarized dust emission is a key tracer in the study of interstellar medium and of star formation. The observed polarization, however, is a product of magnetic field structure, dust grain properties, and grain alignment ...
  • Kinematics of diffuse interstellar clouds: recent GMRT results 
    Dwarakanath, K. S (Astronomical Society of India, 2004-09)
    high latitude HI 21 cm-line absorption survey towards extragalactic sources was recently completed using the Giant Meterwave Radio Telescope (GMRT). A total of 104 sources with |b|>15o and with a 21 cm ¤ux density greater ...
  • Magnetic field structure around cores with very low luminosity objects 
    Soam, A; Maheswar, G; Lee, C. W; Dib, S; Bhatt, H. C; Tamura, M; Kim, G (EDP Sciences, 2015-01)
    Aims. We carried out optical polarimetry of five dense cores, (IRAM 04191, L1521F, L328, L673-7, and L1014) which are found to harbour very low luminosity objects (VeLLOs; Lint ≲ 0.1 L⊙). This study was conducted mainly ...
  • Magnetic fields and young stellar objects in cometary cloud L1616 
    Saha, Piyali; Archana Soam; Baug, Tapas; Maheswar, G; Mondal, Soumen; Ghosh, Tuhin (Oxford University Press on behalf of Royal Astronomical Society, 2022-06)
    The Lynds’ Dark Nebula (LDN) 1615/1616 and CB 28 (hereafter L1616) together form a cometary globule located at an angular distance of about 8◦ west of the Orion OB1 association, aligned roughly along the east–west direction, ...

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