An overview of the proposed Indian spectroscopic and imaging space telescope

Subramaniam, Annapurni

doi:10.1007/s12036-022-09870-3

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…However, some of the filters are still working and providing good results. A future UV mission, INdian Spectroscopic and Imaging Space Telescope (INSIST; PI: Annapurni Subramaniam: [147]) has been approved by the Indian Space Research Organisation (ISRO) (https://www.isro.gov.in/) in 2019. This is an observatory-class mission with an expected resolution of ∼0.2 ′′ , FOV of ∼5 ′ -15 ′ and a detection limit of ∼26 mag in UV for an exposure time of 1 kilosec.…”

Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

“…This is an observatory-class mission with an expected resolution of ∼0.2 ′′ , FOV of ∼5 ′ -15 ′ and a detection limit of ∼26 mag in UV for an exposure time of 1 kilosec. More details about the instruments of the mission can be found in [147]. Ultraviolet Explorer (UVEX) is NASA's upcoming mission, targeted in 2030.…”

Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

“…Both INSIST [147] and UVEX [148] are motivated by strong scientific goals, which include understanding galaxy formation and evolution, the nuclei of galaxies, stellar populations, transients, large sky survey, etc. AGN feedback is an important part of galaxy evolution and a slowly emerging picture is that both positive and negative feedback may be present in galaxies coupled with galaxy mergers or secular and environmental processes.…”

Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

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AGN Feedback Signatures in UV Emission

Rubinur

2024

Galaxies

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Supermassive black holes (SMBH) are believed to influence galaxy evolution through AGN (active galactic nuclei) feedback. Galaxy mergers are key processes of galaxy formation that lead to AGN activity and star formation. The relative contribution of AGN feedback and mergers to star formation is not yet well understood. In radio-loud objects, AGN outflows are dominated by large jets. However, in radio-quiet objects, outflows are more complex and involve jet, wind, and radiation. In this review, we discuss the signatures of AGN feedback through the alignment of radio and UV emissions. Current research on AGN feedback is discussed, along with a few examples of studies such as the galaxy merger system MRK 212, the radio-quiet AGN NGC 2639, and the radio-loud system Centaurus A. Multi-frequency observations of MRK 212 indicate the presence of dual AGN, as well as feedback-induced star-forming UV clumps. The fourth episode of AGN activity was detected in radio observations of the Seyfert galaxy NGC 2639, which also showed a central cavity of 6 kpc radius in CO and UV maps. This indicates that multi-epoch jets of radio-quiet AGN can blow out cold molecular gas, which can further reduce star formation in the center of the galaxies. Recent UV observations of Cen A have revealed two sets of stellar population in the northern star-forming region, which may have two different origins. Recent studies have shown that there is evidence that both positive and negative feedback can be present in galaxies at different scales and times. High-resolution, multi-band observations of large samples of different types of AGN and their host galaxies are important for understanding the two types of AGN feedback and their effect on the host galaxies. Future instruments like INSIST and UVEX will be able to help achieve some of these goals.

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Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

Section: Summary and Future Scope With Uv Telescopesmentioning

confidence: 99%

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AGN Feedback Signatures in UV Emission

Rubinur

2024

Galaxies

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Optical design studies for national large optical-IR telescope

Padikal,

Hasan,

Valsan

et al. 2024

J Astrophys Astron

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Hunting down white dwarf–main sequence binaries using multiwavelength observations

Nayak,

Ganguly,

Chatterjee

2023

Monthly Notices of the Royal Astronomical Society

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Identification of white dwarfs (WD) with main-sequence (MS) companions and characterization of their properties can put important constraints on our understanding of binary stellar evolution and guide the theoretical predictions for a wide range of interesting transient events relevant for, e.g. Rubin Observatory (LSST), ZTF, and LISA. In this study, we combine ultraviolet (UV) and optical colour–magnitude diagrams (CMDs) to identify unresolved WD–MS binaries. In particular, we combine high-precision astrometric and photometric data in the optical from Gaia-DR3 and UV data from GALEX GR6/7 to identify 93 WD–MS candidates within 100 pc. Of these, 80 are newly identified. Using the Virtual Observatory SED Analyzer (VOSA), we fit the spectral energy distributions (SEDs) of all our candidates and derive stellar parameters, such as effective temperature, bolometric luminosity, and radius for both companions. We find that our identification method helps identify hotter and smaller WD companions (majority with ≥10 000 K and ≤0.02 R⊙) relative to the WDs identified by past surveys. We infer that these WDs are relatively more massive (median ∼ $0.76\, \mathrm{M}_\odot$). We find that most of the MS companions in our binaries are of the K and M spectral types.

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An overview of the proposed Indian spectroscopic and imaging space telescope

Cited by 9 publications

References 19 publications

AGN Feedback Signatures in UV Emission

AGN Feedback Signatures in UV Emission

Optical design studies for national large optical-IR telescope

Hunting down white dwarf–main sequence binaries using multiwavelength observations

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