Phosphorus-related species are not known to be as omnipresent in space as hydrogen, carbon, nitrogen, oxygen, and sulfur-bearing species. Astronomers spotted very few P-bearing molecules in the interstellar medium and circumstellar envelopes. Limited discovery of the P-bearing species imposes severe constraints in modeling the P-chemistry. In this paper, we carry out extensive chemical models to follow the fate of P-bearing species in diffuse clouds, photon-dominated or photodissociation regions (PDRs), and hot cores/corinos. We notice a curious correlation between the abundances of PO and PN and atomic nitrogen. Since N atoms are more abundant in diffuse clouds and PDRs than in the hot core/corino region, PO/PN reflects <1 in diffuse clouds, ≪1 in PDRs, and >1 in the late warm-up evolutionary stage of the hot core/corino regions. During the end of the post-warm-up stage, we obtain PO/PN > 1 for hot core and <1 for its low-mass analog. We employ a radiative transfer model to investigate the transitions of some of the P-bearing species in diffuse cloud and hot core regions and estimate the line profiles. Our study estimates the required integration time to observe these transitions with ground-based and space-based telescopes. We also carry out quantum chemical computation of the infrared features of PH₃, along with various impurities. We notice that SO₂ overlaps with the PH₃ bending-scissoring modes around ∼1000–1100 cm⁻¹. We also find that the presence of CO₂ can strongly influence the intensity of the stretching modes around ∼2400 cm⁻¹ of PH₃.

与磷相关的物种在太空中并不像氢、碳、氮、氧和含硫物种那样无处不在。天文学家在星际介质和星周包膜中发现了很少的含磷分子。对含磷物质的有限发现对 P 化学建模施加了严重的限制。在本文中，我们开展了广泛的化学模型，以追踪弥散云、光子主导或光解离区 (PDR) 和热核/corinos 中含磷物种的命运。我们注意到 PO 和 PN 的丰度与原子氮之间存在奇怪的相关性。由于扩散云和 PDR 中的 N 原子比热核/corino 区域中的 N 原子更丰富，PO/PN 在扩散云中反射 <1，在 PDR 中 ≪1，在热核的预热演化后期>1 /科里诺地区。在后热身阶段结束时，我们获得热核的 PO/PN > 1 和低质量模拟物的 <1。我们采用辐射传输模型来研究散布云和热核心区域中一些含磷物质的转变，并估计线剖面。我们的研究估计了使用陆基和天基望远镜观察这些转变所需的积分时间。我们还对PH的红外特征进行了量子化学计算 我们的研究估计了使用陆基和天基望远镜观察这些转变所需的积分时间。我们还对PH的红外特征进行了量子化学计算 我们的研究估计了使用陆基和天基望远镜观察这些转变所需的积分时间。我们还对PH的红外特征进行了量子化学计算₃、伴随着各种杂质。我们注意到 SO ₂与约 1000–1100 cm ^-1的 PH ₃弯剪模式重叠。我们还发现，CO ₂的存在可以强烈影响PH _{3 ～} 2400 cm ^-1附近的拉伸模式的强度。