2023ApJ...945...72A

Query : 2023ApJ...945...72A

2023ApJ...945...72A - Astrophys. J., 945, 72 (2023/March-1)

BICEP/Keck. XVI. Characterizing Dust Polarization through Correlations with Neutral Hydrogen.

ADE P.A.R., AHMED Z., AMIRI M., BARKATS D., BASU THAKUR R., BISCHOFF C.A., BECK D., BOCK J.J., BOENISH H., BULLOCK E., BUZA V., CHESHIRE IV J.R., CLARK S.E., CONNORS J., CORNELISON J., CRUMRINE M., CUKIERMAN A., DENISON E.V., DIERICKX M., DUBAND L., EIBEN M., FATIGONI S., FILIPPINI J.P., FLIESCHER S., GIANNAKOPOULOS C., GOECKNER-WALD N., GOLDFINGER D.C., GRAYSON J., GRIMES P., HALL G., HALAL G., HALPERN M., HAND E., HARRISON S., HENDERSON S., HILDEBRANDT S.R., HUBMAYR J., HUI H., IRWIN K.D., KANG J., KARKARE K.S., KARPEL E., KEFELI S., KERNASOVSKIY S.A., KOVAC J.M., KUO C.L., LAU K., LEITCH E.M., LENNOX A., MEGERIAN K.G., MINUTOLO L., MONCELSI L., NAKATO Y., NAMIKAWA T., NGUYEN H.T., O'BRIENT R., OGBURN IV R.W., PALLADINO S., PETROFF M.A., PROUVE T., PRYKE C., RACINE B., REINTSEMA C.D., RICHTER S., SCHILLACI A., SCHWARZ R., SCHMITT B.L., SHEEHY C.D., SINGARI B., SOLIMAN A., ST GERMAINE T., STEINBACH B., SUDIWALA R.V., TEPLY G.P., THOMPSON K.L., TOLAN J.E., TUCKER C., TURNER A.D., UMILTA C., VERGES C., VIEREGG A.G., WANDUI A., WEBER A.C., WIEBE D.V., WILLMERT J., WONG C.L., WU W.L.K., YANG H., YOON K.W., YOUNG E., YU C., ZENG L., ZHANG C., ZHANG S. (The BICEP/Keck Collaboration)

Abstract (from CDS):

We characterize Galactic dust filaments by correlating BICEP/Keck and Planck data with polarization templates based on neutral hydrogen (H I) observations. Dust polarization is important for both our understanding of astrophysical processes in the interstellar medium (ISM) and the search for primordial gravitational waves in the cosmic microwave background (CMB). In the diffuse ISM, H I is strongly correlated with the dust and partly organized into filaments that are aligned with the local magnetic field. We analyze the deep BICEP/Keck data at 95, 150, and 220 GHz, over the low-column-density region of sky where BICEP/Keck has set the best limits on primordial gravitational waves. We separate the H I emission into distinct velocity components and detect dust polarization correlated with the local Galactic H I but not with the H I associated with Magellanic Stream I. We present a robust, multifrequency detection of polarized dust emission correlated with the filamentary H I morphology template down to 95 GHz. For assessing its utility for foreground cleaning, we report that the HI morphology template correlates in B modes at a ∼10%-65% level over the multipole range 20 < ℓ < 200 with the BICEP/Keck maps, which contain contributions from dust, CMB, and noise components. We measure the spectral index of the filamentary dust component spectral energy distribution to be β = 1.54 ± 0.13. We find no evidence for decorrelation in this region between the filaments and the rest of the dust field or from the inclusion of dust associated with the intermediate velocity H I. Finally, we explore the morphological parameter space in the H I-based filamentary model.

Journal keyword(s): Interstellar dust - Interstellar filaments - Neutral hydrogen clouds - Cosmic microwave background radiation - Interstellar magnetic fields - Interstellar medium - Interstellar atomic gas - Galaxy magnetic fields - Milky Way magnetic fields - Magnetic fields - Interstellar phases

Simbad objects: 6

Full paper

View the references in ADS

Number of rows : 6

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Sp type	#ref 1850 - 2026	#notes
1	NAME Magellanic Stream	HVC	00 32	-30.0			~	1079	1
2	NAME SMC	G	00 52 38.0	-72 48 01	2.79	2.2	~	12317	1
3	[MSM77] MS I	HVC	01 24	-58.8			~	20	0
4	NAME Magellanic Clouds	GrG	03 00	-71.0			~	7988	0
5	NAME Magellanic Bridge	HI	03 11	-77.5			~	522	1
6	NAME LMC	G	05 23 34.6	-69 45 22		0.4	~	19090	0

To bookmark this query, right click on this link: simbad:objects in 2023ApJ...945...72A and select 'bookmark this link' or equivalent in the popup menu