2020ApJ...905..119F


Query : 2020ApJ...905..119F

2020ApJ...905..119F - Astrophys. J., 905, 119-119 (2020/December-3)

The Herschel Orion Protostar Survey: far-infrared photometry and colors of protostars and their variations across Orion A and B.

FISCHER W.J., MEGEATH S.T., FURLAN E., STUTZ A.M., STANKE T., TOBIN J.J., OSORIO M., MANOJ P., DI FRANCESCO J., ALLEN L.E., WATSON D.M., WILSON T.L. and HENNING T.

Abstract (from CDS):

The degree to which the properties of protostars are affected by environment remains an open question. To investigate this, we look at the Orion A and B molecular clouds, home to most of the protostars within 500 pc. At ∼400 pc, Orion is close enough to distinguish individual protostars across a range of environments in terms of both the stellar and gas projected densities. As part of the Herschel Orion Protostar Survey (HOPS), we used the Photodetector Array Camera and Spectrometer to map 108 partially overlapping square fields with edge lengths of 5' or 8' and measure the 70 and 160 µm flux densities of 338 protostars within them. In this paper we examine how these flux densities and their ratio depend on evolutionary state and environment within the Orion complex. We show that Class 0 protostars occupy a region of the 70 µm flux density versus 160 µm/70 µm flux density ratio diagram that is distinct from their more evolved counterparts. We then present evidence that the Integral-Shaped Filament (ISF) and Orion B contain protostars with more massive inner envelopes than those in the more sparsely populated LDN 1641 region. This can be interpreted as evidence for increasing star formation rates in the ISF and Orion B or as a tendency for more massive inner envelopes to be inherited from denser birth environments. We also provide technical details about the mapmaking and photometric procedures used in the HOPS program.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Protostars - Star formation - Infrared sources

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME California Molecular Cloud MoC 04 10.0 +39 00           ~ 111 1
2 NGC 2028 Cl* 05 33 50.370 -69 56 41.23   13.16 12.88     ~ 21 0
3 NAME f-Shaped Filament in Orion Cld 05 35.0 -05 30           ~ 81 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2067 1
5 [MGM2012] 1400 Y*O 05 35 08.52 -05 35 59.4           ~ 8 0
6 NAME Ori Complex Cld 05 35.3 -05 23           ~ 362 0
7 JW 703 Y*O 05 35 22.4056752156 -05 08 05.132895734     17.26   13.95 M0e 33 0
8 2MASS J05352341-0512023 Y*O 05 35 23.417 -05 12 02.34           ~ 25 0
9 NAME OMC-2/3 reg 05 35 33.0 -05 00 32           ~ 62 0
10 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 223 0
11 HOPS 169 Y*O 05 36 36.00 -06 38 54.0           ~ 7 0
12 2MASS J05375096-0647195 Y*O 05 37 50.966 -06 47 19.56           ~ 7 0
13 NAME Ori I As* 05 38 -02.8           ~ 570 0
14 NAME Ori A MoC 05 38 -07.1           ~ 2774 0
15 NAME LDN 1641 Center DNe 05 38 46.4 -07 01 05           ~ 52 0
16 LDN 1641 MoC 05 39.0 -07 00           ~ 441 0
17 NAME LDN 1641 South DNe 05 40 27.6 -07 27 28           ~ 51 1
18 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 582 1
19 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1225 0
20 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1091 1
21 [MGM2012] 246 Y*O 05 42 58.36 -08 37 43.5           ~ 4 0
22 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 352 0
23 LDN 1622 DNe 05 54 28 +01 48.2           ~ 96 0
24 HOPS 362 Y*O ~ ~           ~ 4 0

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2021.07.31-09:18:35

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