Koley & Roy (2018) – Estimating kinetic temperature from H I 21 cm absorption studies: correction for the turbulence broadening

Neutral hydrogen 21 cm transition is a useful tracer of the neutral interstellar medium. However, inferring physical condition from the observed 21 cm absorption and/or emission spectra is often not

Stanimirovic, Heiles & Kanekar (2007) – Properties of the Thinnest Cold HI clouds in the Diffuse Interstellar Medium

We have obtained deep HI observations in the direction of 22 continuum sources without previously detected cold neutral medium (CNM). 18 CNM clouds were detected with a typical HI column

Ysard et al. (2018) – The optical properties of dust: the effects of composition, size, and structure

Grains are determinant for setting the chemical, physical, dynamical, and radiative properties of all the media in which they are present. Their influence depends on the grain composition, size, and

Aannestad & Purcell (1973) – Interstellar Grains

Not Available Aannestad, Per A.; Purcell, Edward M. 1973, Annual Review of Astronomy and Astrophysics, 11, 309 http://adsabs.harvard.edu/abs/1973ARA%26A..11..309A

Mohan, Dwarakanath & Srinivasan (2004) – A High Galactic Latitude HI 21cm-line Absorption Survey using the GMRT: I. Observations and Spectra

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

Heiles (1997) – Tiny-Scale Atomic Structure and the Cold Neutral Medium

We consider the tiny-scale atomic structure (TSAS) on scales of tens of astronomical units, which has been detected by 21 cm absorption lines against quasars with VLBI techniques, against pulsars

Roy et al. (2013) – The temperature of the diffuse H I in the Milky Way – I. High resolution H I-21 cm absorption studies

We have carried out deep, high velocity resolution, interferometric Galactic H I-21 cm absorption spectroscopy towards 32 compact extragalactic radio sources with the Giant Metrewave Radio Telescope (GMRT) and the

Stanimirovic et al. (2010) – Arecibo Multi-epoch H I Absorption Measurements Against Pulsars: Tiny-scale Atomic Structure

We present results from multi-epoch neutral hydrogen (H I) absorption observations of six bright pulsars with the Arecibo telescope. Moving through the interstellar medium (ISM) with transverse velocities of 10-150

Heiles & Troland (2003) – The Millennium Arecibo 21 Centimeter Absorption-Line Survey. II. Properties of the Warm and Cold Neutral Media

We use the Gaussian fit results of Paper I to investigate the properties of interstellar H I in the solar neighborhood. The warm and cold neutral media (WNM and CNM)

Colgan, Salpeter & Terzian (1988) – H I emission-absorption studies with high-velocity resolution

The properties of interstellar H I are investigated using high-velocity resolution, Arecibo emission-absorption spectra in the direction of 40 radio continuum sources, including 21 at low Galactic latitude. Comparison of

Payne, Salpeter & Terzian (1983) – Interpretation of neutral hydrogen spin temperature measurements

Arecibo 3-arcsec beam neutral hydrogen emission-absorption observations are analyzed, and spin temperature results in the direction of ‘small’ and ‘large’ extragalactic sources are found to be statistically similar. The variations

Murray et al. (2015) – The 21-SPONGE HI Absorption Survey I: Techniques and Initial Results

We present methods and results from “21 cm Spectral Line Observations of Neutral Gas with the EVLA” (21-SPONGE), a large survey for Galactic neutral hydrogen (H i) absorption with the

Braun & Kanekar (2005) – Tiny H I clouds in the local ISM

We report deep, high spectral resolution WSRT H I 21 cm observations of four high latitude compact radio sources, that have revealed a new population of tiny, discrete clouds in

Mohan, Dwarakanath & Srinivasan (2004) – A High Galactic Latitude HI 21cm-line Absorption Survey using the GMRT: II. Results and Interpretation

We have carried out a sensitive high-latitude (|b| > 15?) HI 21 cm-line absorption survey towards 102 sources using the GMRT. With a 3sigma detection limit in optical depth of