A study of far infrared loop at -5o galactic latitude around pulsar J1627-5547

Jha, Ajay Kumar; Aryal, B.

doi:10.3126/bibechana.v15i0.18443

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…The average value of the dust color temperature in the core region of the cavity is found to be 18.15 K, equal to the Gaussian center (Fig. 4a) with an offset of 1.10 K (< 2 K), suggests that the cavity is dynamically stable [19]. Generally, the Gaussian distribution is found to be in the good agreement with both Td and Md distributions (Figs.…”

Section: Gaussian Nature Of Dust Color Temperature and Dust Massmentioning

confidence: 57%

A study of dust structure nearby white dwarf WD1334-678

2021

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A low flux density region nearby white dwarf WD1334-678 in the 140 µm AKARI survey maps has been systematically searched and found a far-infrared cavity centered at R.A. (J2000) = 13h38m14.4s, Dec.(J2000) = −68◦40’42”, in which minimum flux is 19.5 MJy/sr at 90 µm wavelength. The physical properties (Size, dust color temperature, dust mass) and thermodynamic property (Planck function distribution) of the cavity using 140 µm and 90 µm AKARI survey data. The size of the cavity is found to be 0.17◦× 0.12◦ has been presented. The dust color temperature is found in the range 17.70 ± 0.01 K to 18.81 ± 0.01 K. The Plank function distribution along major and minor diameters shows a very good agreement with sinusoidal fitting. The period of oscillation of dust particles along major and minor diameters are 3.2 Wm-2Sr-1Hz-1arcmin-1and 1.6 Wm-2Sr-1Hz-1arcmin-1, respectively. BIBECHANA 18 (2) (2021) 130-137

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Section: Gaussian Nature Of Dust Color Temperature and Dust Massmentioning

confidence: 57%

A study of dust structure nearby white dwarf WD1334-678

2021

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“…A study of dust cavity near the Pulsar at Galactic latitude: -60 0 shows the variation of dust color temperature from 22.78 K to 24.78 K, implying that the cavity structure is less disturbed from nearby Pulsar and it's radiation [11]. The study of FIR loop (cavity) at Galactic latitude: -5 0 near the Pulsar J1627-5547 shows a temperature variation of 16 K suggesting the cavity is dynamically active, which consists of a more stable core region having a temperature variation of less than 3 K [12]. In a study using Improved Reprocessing of IRAS Survey (IRIS) and AKARI infrared survey data, the infra-red study of isolated dust structure, located at Galactic latitude 0.04 0 nearby supernova remnants G053.41+00.3, G053.9+00.2 and G053.1+00.3, found a large fluctuation of dust color temperature of more than10 K [13].…”

Section: Introductionmentioning

confidence: 94%

Comparative Study of Dust Properties around White Dwarf PG 1225-079 in IRIS, AKARI and WISE Data

Sigdel¹,

Rijal²,

Paudel³

2022

J. Nep. Phys. Soc.

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In this work, dust properties around the White Dwarf PG 1225-079 located at RA (J2000): 12h 27m 47.35s, DEC(J2000): -08° 14’ 37.97” is studied extensively using the publicly available data from Improved Reprocessing of IRAS Survey (IRIS), AKARI infrared survey and Wide field Infrared Survey Explorer (WISE). The bipolar dust structure hardly resolved in IRIS (60 μm and 100 μm) is clearly resolved in AKARI (90 μm and 140 μm) and WISE (12 μm and 22 μm) images. The dust color temperature and dust mass are calculated from the infrared flux density. The average value of dust color temperature in isolated dust structure is 27.57 K for IRIS (I1). For isolated upper and lower dust clouds the average temperatures are; 22.64 K and 22.63 K for AKARI (A1 and A2), 295.34 K and 296.85 K in WISE (W1 and W2) data. A wide range of temperatures suggests the bipolar dust structure is dynamically active. The mass of dust is found to be 3.44 × 1025 kg in IRIS (I1), 1.82 × 1026 kg and 5.89×1026 kg in two bipolar regions in AKARI (A1 and A2) and 1.12 ×1026 kg and 1.14×1026 kg in WISE (W1 and W2). A good relation is found between the infrared flux in all survey data with r2 value 0.83 in IRIS (I1) and more than 0.90 in AKARI (A1, A2) and WISE (W1, W2) data. SIMBAD database explore some sources including Supernova Remnants nearby the dust which might be the progenitor of dust as well as the contributor of energetic radiation. The Gaussian modeling of temperature is found to be deviated from normal shape. The contour plot of dust color temperature and dust mass shows non uniform variation among the IRIS, AKARI and WISE survey. The relation between infrared flux, dust color temperature and dust mass within the dust clouds are presented.

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“…Study of dust cavity nearby the Pulsar at Galactic latitude: −60 • shows the variation of dust color temperature from 22.78 K to 24.78 K and concluded that the cavity structure is less disturbed from nearby Pulsar and it's radiation [4]. The study of FIR loop (cavity) at Galactic latitude: −5 • near the Pulsar J1627−5547 shows temperature variation of 16 K suggesting the cavity is dynamically active, which consist of a more stable core region having temperature variation less than 3 K [2]. In the study of dust properties within a dust structure located at Galactic latitude 0.04 • nearby Supernova remnants G053.41+00.3, G053.9+00.2 and G053.1+00.3, a large fluctuation of dust color temperature more than 10 K is found [6].…”

Section: Introductionmentioning

confidence: 98%

“…Study of interstellar dust enables us to explore the distribution of temperature and related phenomenon around the region. There have been many works exploring the properties of the dust within the nebulae [1], FIR loops [2,3] Pulsar [4], Supernova remnants [5], White Dwarf [5] and many more. Study of dust cavity nearby the Pulsar at Galactic latitude: −60 • shows the variation of dust color temperature from 22.78 K to 24.78 K and concluded that the cavity structure is less disturbed from nearby Pulsar and it's radiation [4].…”

Section: Introductionmentioning

confidence: 99%

Studies of Dust Properties in Sub−Structures around White Dwarf WD 0307+077 in IRIS Survey

Paudel

2022

J. Nep. Phys. Soc.

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A huge dust structure of size 3° ×3° consisting of many sub−structures of dust nebulae and dust cavities is discovered around the WD 0307+077, located at RA (ICRS): 47.59° , DEC (ICRS): +7.84° , in far−infrared image of IRIS survey. Infrared flux density at 60 µm and 100 µm are used to calculate dust color temperature and dust mass in dust structure and all sub−structures. The contour plot is used to visualize the variation of infrared flux, dust color temperature and dust mass within all sub−structures. The inclination angle of isolated region of sub−structures is calculated to know the shape of the dust cloud. It is found that the dust color temperature of all the nebulae and cavities lies between the 20 K to 24 K, with range not more than 3 K. This range of temperature suggests that the sub−structures are moving towards the thermal stability. The dust mass shows the similar mass composition within all sub−structures, with variation of just one order magnitude. The linear regression shows a very good linear relation between between the infrared flux at 60 µm and 100 µm wavelength with regression coefficient more than 0.90 in five sub−structures and more than 0.78 in remaining two. The inclination angle of shows the all sub−structures are clearly edge−on in shape having inclination angle i > 45° . The Gaussian distribution of dust color temperature in all sub−structures shows more or less deviation from Normal distribution, the background sources observed in the SIMBAD database are suspected for this deviation.

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A study of far infrared loop at -5o galactic latitude around pulsar J1627-5547

Cited by 5 publications

References 6 publications

A study of dust structure nearby white dwarf WD1334-678

A study of dust structure nearby white dwarf WD1334-678

Comparative Study of Dust Properties around White Dwarf PG 1225-079 in IRIS, AKARI and WISE Data

Studies of Dust Properties in Sub−Structures around White Dwarf WD 0307+077 in IRIS Survey

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