Zobrazeno 1 - 10
of 104
pro vyhledávání: '"KANAK SAHA"'
Autor:
Suraj Dhiwar, Kanak Saha, Soumil Maulick, Brent M. Smith, Chayan Mondal, Harry I. Teplitz, Marc Rafelski, Rogier A. Windhorst
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L23 (2024)
We report the direct detection of Lyman continuum (LyC) emission from nine galaxies and one active galactic nucleus at z ∼ 1.1–1.6 in the GOODS-North field using deep observations from the Ultraviolet Imaging Telescope (UVIT) on board AstroSat. T
Externí odkaz:
https://doaj.org/article/1903de82de05419387a03fc508a18c11
Autor:
Kanak Saha, Soumil Maulick, Pushpak Pandey, Souradeep Bhattacharya, Anshuman Borgohain, Chayan Mondal, Marc Rafelski, Manish Kataria, Harry I. Teplitz, Shyam N. Tandon, Rogier A. Windhorst, Bruce G. Elmegreen, Edmund Christian Herenz, Michael Rutkowski
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 28 (2024)
We present the AstroSat UV Deep Field south (AUDFs), an imaging survey using the wide-field Ultraviolet Imaging Telescope on board AstroSat. AUDFs cover ∼236 arcmin ^2 of the sky area, including the Great Observatories Origins Deep Survey (GOODS) S
Externí odkaz:
https://doaj.org/article/b4072cf312bc4c1a94176bc90958d792
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 117 (2024)
We present results from our deep far-ultraviolet (FUV) survey using AstroSat/UVIT of a filamentary structure at z ∼0.072. A total of four filaments comprising 58 galaxies were probed in our study. We detect 18 filament galaxies in our FUV observati
Externí odkaz:
https://doaj.org/article/c2a0d72d470649d293dbb41f76cb63e3
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 138 (2024)
We report the detection of Lyman-continuum (LyC) photons from a massive interacting system at z = 1.097 in the Hubble Ultra Deep Field. The LyC detection is made in the far-ultraviolet F154W band of the UVIT telescope on board AstroSat. Both JWST and
Externí odkaz:
https://doaj.org/article/8df331e9e1d141a5b6d373e267853859
Autor:
Chayan Mondal, Kanak Saha
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 80 (2024)
The relation between the observed UV continuum slope ( β ) and the infrared excess (IRX) is used as a powerful probe to understand the nature of dust attenuation law in high-redshift galaxies. We present a study of 83 UV-selected galaxies between a
Externí odkaz:
https://doaj.org/article/c4448e03b21b469bada8c3a57a85d9a3
Autor:
Chayan Mondal, Kanak Saha, Souradeep Bhattacharya, Anshuman Borgohain, Shyam N. Tandon, Marc Rafelski, Rolf A. Jansen, Rogier A. Windhorst, Harry I. Teplitz, Brent M. Smith
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 264, Iss 2, p 40 (2023)
We present deep UV imaging observations of the Great Observatories Origins Survey Northern (GOODS-N) field with AstroSat/UVIT (AstroSat UV Deep Field north—AUDFn), using one far-UV (FUV) (F154W, 34.0 ks) and two near-UV (NUV) filters (N242W, 19.2 k
Externí odkaz:
https://doaj.org/article/4a31ad4a2d01490cb7aa32ea8825d096
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 90 (2023)
We estimate the UV continuum slope ( β ) of 465 galaxies (with luminosities of 0.028–3.3 ${L}_{z=0.5}^{* }$ ) in the Great Observatories Origins Survey Northern field in the redshift range z = 0.40–0.75. We use two AstroSat/UVIT (N242W, N245M) b
Externí odkaz:
https://doaj.org/article/2efbfc7ae936404d9ab5a6c33e348335
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 511:5878-5896
An $m=1$ lopsided asymmetry is common in disc galaxies. Here, we investigate the excitation of an $m=1$ lopsidedness in host galaxies during minor mergers while choosing a set of 1:10 merger models (with varying orbital configurations, morphology of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd86cbf38b652f36c6bb2f2618a1beff
https://doi.org/10.1093/mnras/stac461
https://doi.org/10.1093/mnras/stac461
We estimate the UV continuum slope ($\beta$) of 465 galaxies (with luminosities of 0.028 $-$ 3.3 $L^{*}_{z=0.5}$) in the Great Observatories Origins Survey (GOODS) Northern field in the redshift range $z=0.40 - 0.75$. We use two AstroSat/UVIT (N242W,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::730968228055f7c8db54e7947220fda2
The origin of star-formation in customarily passively evolving early-type massive galaxies is poorly understood. We present a case study of a massive galaxy, I~Zw~81, inside the Bootes void. The void galaxy is known to host an active galactic nuclei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01c056cdfcec38a8509182a970fd5305
http://arxiv.org/abs/2211.04043
http://arxiv.org/abs/2211.04043